ArcGIS API for WPF - Library Reference
ClassBreaksRenderer Class
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ESRI.ArcGIS.Client Namespace : ClassBreaksRenderer Class

A custom graphics renderer where the symbology of a Layer is displayed via groups based upon numerical data.

Object Model

ClassBreaksRenderer ClassSymbol Class

Syntax

Visual Basic (Declaration) 
Public NotInheritable Class ClassBreaksRenderer 
   Inherits System.Windows.DependencyObject
   Implements IJsonSerializable, ILegendSupport, IRenderer 
C# 
public sealed class ClassBreaksRenderer : System.Windows.DependencyObject, IJsonSerializable, ILegendSupport, IRenderer 

Example

XAMLCopy Code
<!-- 
Important information regarding this code:
This XAML provides three examples of using the ClassBreaksRenderer with different symbology
(Marker, Line, and Fill). Each example is nested within it's own <Grid/> block. Copy just
one example within each  into your test project. Do not copy this entire XAML code
into your test project as it will not work with three <Grid/>'s overlapping.
-->
             	
<Grid x:Name="LayoutRoot" Background="White">
  <!-- 
  Marker Example:
  This example shows how to draw Markers (aka. Points) on a FeatureLayer using the ClassBreaksRenderer 
  Class. This example takes two Map controls as arguments to compare the effect of applying a 
  ClassBreaksRenderer. Map1 will show a basic FeatureLayer that comes by default from ArcGIS Server. 
  Map2 will show the same FeatureLayer but with a specific ClassBreaksRenderer applied, to 
  compare the differences.
  -->
             	
  <!--
  Display the default FeatureLayer in myMap1:
  Add an ArcGISTiledMapsServiceLayer as a background to the map. Note: The ArcGISTiledMapsServiceLayer 
  layer is first Layer added to the Map's Layers Collection and is drawn on the bottom. A FeatureLayer 
  is then added to the map and draws on top of the background layer.
  Set the Map1 Extent to zoom to the continental United States.
  -->
  <esri:Map Background="White" HorizontalAlignment="Left" Margin="12,227,0,0" 
        Name="Map1" VerticalAlignment="Top" Height="375" Width="375" 
        Extent="-130,10,-70,60" >
            
    <esri:ArcGISTiledMapServiceLayer ID="StreetMapLayer1"
                                     Url="http://services.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer"/>
             	
    <!--
    The FeatureLayer contains United States cities as Markers (aka. Points). The Where clause for 
    the FeatureLayer is optional. The Where clause is necessary when more that 500/1000 records 
    returned. In ArcGIS Server 9.3.1 and prior, the default maximum is 500 records returned per 
    FeatureLayer. In ArcGIS Server 10 the default is 1000. This setting is configurable per map 
    service using ArcCatalog or ArcGIS Server Manager (on the Parameters tab).
    -->
     <esri:FeatureLayer ID="MyFeatureLayer1"
                        Url="http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StatesCitiesRivers_USA/MapServer/0" 
                        Where="POP1990 > 100000" />
  </esri:Map>
             	
             	
  <!--
  Display the FeatureLayer in myMap2 that has a ClassBreaksRenderer applied:
  Add an ArcGISTiledMapsServiceLayer as a background to the map. Note: The ArcGISTiledMapsServiceLayer 
  layer is first Layer added to the Map's Layers Collection and is drawn on the bottom. A FeatureLayer 
  is then added to the map and draws on top of the background layer.
  Set the Map2 Extent to zoom to the continental United States.
  -->
  <esri:Map Background="White" Height="375" HorizontalAlignment="Left" Margin="408,227,0,0" 
            Name="Map2" VerticalAlignment="Top" Width="375" 
            Extent="-130,10,-70,60" >
    <esri:ArcGISTiledMapServiceLayer ID="StreetMapLayer2"
                                     Url="http://services.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer"/>
             	
    <!--
    The FeatureLayer contains United States cities as Markers (aka. Points). The Where clause for 
    the FeatureLayer is optional. The Where clause is necessary when more that 500/1000 records 
    returned. In ArcGIS Server 9.3.1 and prior, the default maximum is 500 records returned per 
    FeatureLayer. In ArcGIS Server 10 the default is 1000. This setting is configurable per map 
    service using ArcCatalog or ArcGIS Server Manager (on the Parameters tab). Specify the 
    Outfields Property to specify which Fields are returned on which the 
    ClassBreaksRenderer.Field can use. Specifying the wildcard (*) character in the Add 
    Property will return all Fields. 
    -->
    <esri:FeatureLayer ID="MyFeatureLayer2"
                       Url="http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StatesCitiesRivers_USA/MapServer/0" 
                       Where="POP1990 > 100000" 
                       OutFields="POP1990">
    
      <!--
      Create the ClassBreakRenderer. Specify which field (via its string name) 
      the ClassBreaksRenderer will use for breaking the rendering of the Symbols into groups. 
      Note: The Field that is specified for the Field Property MUST be a numeric (Double, 
      Integer, SmallInteger, or Single) Field.FieldType. To Render groups of Strings use
      the UniqueValueRenderer instead.
      -->
      <esri:FeatureLayer.Renderer>
        <esri:ClassBreaksRenderer Field="POP1990">
        
          <!--
          Define a default SimpleMarkerSymbol for a 'catch all' to draw the features 
          for which no ClassBreaksInfo has been defined. In this example, only cities 
          with a population (POP1990) from 20,000 to 100,000,000 have a defined 
          ClassBreakInfo category and yet all cities with a population greater than 
          100,000 will be returned. Defining a default SimpleMarkerSymbol will provide 
          symbology for those features that are greater than 100,000 but less than 
          200,000. If a ClassBreaksRenderer.DefaultSymbol was not defined these features
          would not be drawn on the Map.
          -->
          <esri:ClassBreaksRenderer.DefaultSymbol>
            <esri:SimpleMarkerSymbol Color="Red" Size="3"/>
          </esri:ClassBreaksRenderer.DefaultSymbol>
                  
          <!--
          NOTE: By default if no Style is specified the is specified for a SimpleMarkerSymbol 
          the SimpleMarkerStyle.Circle is set.
                  
          A ClassBreaksRenderer should have 2 or more ClassBreakInfo Classes (meaning 
          classification or grouping) to delineate the different symbology and class break 
          information. The next three sections of code define 3 different ClassBreakInfo 
          Classes (or groups) and their associated symbology.
          -->
                
          <!--
          Group #1: Create a ClassBreakInfo object as a container of information for each 
          group. Define the minimum and maximum values for the numeric grouping of the 
          Field defined as the ClassBreaksRenderer.Field. Add a description and label.
          -->
          <esri:ClassBreakInfo MinimumValue="200000" MaximumValue="300000"
                                  Description="200K to 300K people" Label="A cyan circle size 6">
            <esri:SimpleMarkerSymbol Color="Cyan" Size="6"/>
          </esri:ClassBreakInfo>
                
          <!--
          Group #2: Create a ClassBreakInfo object as a container of information for each 
          group. Define the minimum and maximum values for the numeric grouping of the 
          Field defined as the ClassBreaksRenderer.Field. Each ClassBreakInfo grouping 
          needs a symbol to display. In this case the SimpleMarkerSymbol Style was specified 
          to be a Triangle (rather than the default Circle).  Add a description and label.
          -->
          <esri:ClassBreakInfo MinimumValue="300000" MaximumValue="750000"
                                  Description="300K to 750 people" Label="An olive triangle size 10">
            <esri:SimpleMarkerSymbol Color="Olive" Size="10" Style="Triangle"/>
          </esri:ClassBreakInfo>
                
          <!--
          Group #3: Create a ClassBreakInfo object as a container of information for each 
          group. Define the minimum and maximum values for the numeric grouping of the 
          Field defined as the ClassBreaksRenderer.Field. Each ClassBreakInfo grouping 
          needs a symbol to display. In this case the SimpleMarkerSymbol Style was specified 
          to be a Square (rather than the default Circle). Add a description and label.
          -->
          <esri:ClassBreakInfo MinimumValue="750000" MaximumValue="100000000"
                                  Description="750K to 100M people" Label="A black square size 14">
            <esri:SimpleMarkerSymbol Color="Black" Size="14" Style="Square"/>
          </esri:ClassBreakInfo>
                                    
           </esri:ClassBreaksRenderer>
         </esri:FeatureLayer.Renderer>
       </esri:FeatureLayer>
     </esri:Map>
   </Grid>
   
   <Grid x:Name="LayoutRoot">
     <!-- 
     Line Example:
     This example shows how to draw Lines (aka. Polylines) on a FeatureLayer using the ClassBreaksRenderer 
     Class. This example takes two Map controls as arguments to compare the effect of applying a 
     ClassBreaksRenderer. Map1 will show a basic FeatureLayer that comes by default from ArcGIS Server. 
     Map2 will show the same FeatureLayer but with a specific ClassBreaksRenderer applied, to 
     compare the differences.
     -->
   
     <!--
     Display the default FeatureLayer in myMap1:
     Add an ArcGISTiledMapsServiceLayer as a background to the map. Note: The ArcGISTiledMapsServiceLayer 
     layer is first Layer added to the Map's Layers Collection and is drawn on the bottom. A FeatureLayer 
     is then added to the map and draws on top of the background layer.
     Set the Map1 Extent to zoom to the continental United States.
     -->
     <esri:Map Background="White" HorizontalAlignment="Left" Margin="12,227,0,0" 
               Name="Map1" VerticalAlignment="Top" Height="375" Width="375" 
               Extent="-130,10,-70,60" >
               
       <esri:ArcGISTiledMapServiceLayer ID="StreetMapLayer1"
                                        Url="http://services.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer"/>
     
       <!--
       The FeatureLayer contains United States Interstate roads as Lines (aka. Polylines). The Where 
       clause for the FeatureLayer is optional. The Where clause is necessary when more that 500/1000 
       records returned. In ArcGIS Server 9.3.1 and prior, the default maximum is 500 records returned 
       per FeatureLayer. In ArcGIS Server 10 the default is 1000. This setting is configurable per map 
       service using ArcCatalog or ArcGIS Server Manager (on the Parameters tab).
       -->
       <esri:FeatureLayer ID="MyFeatureLayer1"
                          Url="http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StateCityHighway_USA/MapServer/0" 
                          Where="ADMN_Class='Interstate'" />
     </esri:Map>
       
       
     <!--
     Display the FeatureLayer in myMap2 that has a ClassBreaksRenderer applied:
     Add an ArcGISTiledMapsServiceLayer as a background to the map. Note: The ArcGISTiledMapsServiceLayer 
     layer is first Layer added to the Map's Layers Collection and is drawn on the bottom. A FeatureLayer 
     is then added to the map and draws on top of the background layer.
     Set the Map2 Extent to zoom to the continental United States.
     -->
     <esri:Map Background="White" Height="375" HorizontalAlignment="Left" Margin="408,227,0,0" 
               Name="Map2" VerticalAlignment="Top" Width="375" 
               Extent="-130,10,-70,60" >
                   
       <esri:ArcGISTiledMapServiceLayer ID="StreetMapLayer2"
                                        Url="http://services.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer"/>
       
       <!--
       The FeatureLayer contains United States Interstate roads as Lines (aka. Polylines). The Where 
       clause for the FeatureLayer is optional. The Where clause is necessary when more that 500/1000 
       records returned. In ArcGIS Server 9.3.1 and prior, the default maximum is 500 records returned 
       per FeatureLayer. In ArcGIS Server 10 the default is 1000. This setting is configurable per map 
       service using ArcCatalog or ArcGIS Server Manager (on the Parameters tab). Specify the 
       Outfields Property to specify which Fields are returned on which the 
       ClassBreaksRenderer.Field can use. Specifying the wildcard (*) character in the Add 
       Property will return all Fields. 
       -->
       <esri:FeatureLayer ID="MyFeatureLayer2"
                          Url="http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StateCityHighway_USA/MapServer/0" 
                          Where="ADMN_Class='Interstate'" OutFields="LENGTH">
         
         <!--
         Create the ClassBreakRenderer. Specify which Field field (via its string name) 
         the ClassBreaksRenderer will use for breaking the rendering of the Symbols into groups. 
         Note: The Field that is specified for the Field Property MUST be a numeric (Double, 
         Integer, SmallInteger, or Single) Field.FieldType. To Render groups of Strings use
         the UniqueValueRenderer instead.
         -->
         <esri:FeatureLayer.Renderer>
           <esri:ClassBreaksRenderer Field="LENGTH">
               
             <!--
             Define a default SimpleLineSymbol for a 'catch all' to draw the features 
             for which no ClassBreaksInfo has been defined. In this example, only Interstate 
             roads with a road-length (LENGTH) from 50 to 1,000 miles have a defined 
             ClassBreakInfo category and yet all the Interstate roads will be returned (really 
             only the first 500 features are returned due to the ArcGIS Service configuration). 
             Defining a default SimpleLineSymbol will provide symbology for those features that 
             have road lengths greater than 0 but less than 50 miles long. If a 
             ClassBreaksRenderer.DefaultSymbol was not defined these features would not be 
             drawn on the Map.
             -->
             <esri:ClassBreaksRenderer.DefaultSymbol>
               <esri:SimpleLineSymbol Color="Yellow" Width="5"/>
             </esri:ClassBreaksRenderer.DefaultSymbol>
             
             <!--
             NOTE: By default if no LineStyle is specified the is specified for a 
             SimpleLineSymbol the LineStyle.Solid is set.
             
             A ClassBreaksRenderer should have 2 or more ClassBreakInfo Classes (meaning 
             classification or grouping) to delineate the different symbology and class break 
             information. The next three sections of code define 3 different ClassBreakInfo 
             Classes (or groups) and their associated symbology.
             -->
             
             <!--
             Group #1: Create a ClassBreakInfo object as a container of information for each 
             group. Define the minimum and maximum values for the numeric grouping of the 
             Field defined as the ClassBreaksRenderer.Field. Add a description and label.
             -->
             <esri:ClassBreakInfo MinimumValue="50" MaximumValue="100"
                                     Description="50 to 100 miles long" Label="A cyan solid line, width 3">
               <esri:SimpleLineSymbol Color="Cyan" Width="3"/>
             </esri:ClassBreakInfo>
            
             <!--
             Group #2: Create a ClassBreakInfo object as a container of information for each 
             group. Define the minimum and maximum values for the numeric grouping of the 
             Field defined as the ClassBreaksRenderer.Field. Each ClassBreakInfo grouping 
             needs a symbol to display. In this case the SimpleLineSymbol LineStyle was 
             specified to be a Dash (rather than the default Solid). Add a description and label.
             -->
             <esri:ClassBreakInfo MinimumValue="100" MaximumValue="200"
                                     Description="100 to 200 miles long" Label="An olive dash line, width 1">
               <esri:SimpleLineSymbol Color="Olive" Width="1" Style="Dash"/>
             </esri:ClassBreakInfo>
            
             <!--
             Group #3: Create a ClassBreakInfo object as a container of information for each 
             group. Define the minimum and maximum values for the numeric grouping of the 
             Field defined as the ClassBreaksRenderer.Field. Each ClassBreakInfo grouping 
             needs a symbol to display. In this case the SimpleLineSymbol LineStyle was 
             specified to be a Dot (rather than the default Solid). Add a description and label.
             -->
             <esri:ClassBreakInfo MinimumValue="200" MaximumValue="1000"
                                     Description="200 to 1000 miles long" Label="A black dot line, width 2">
               <esri:SimpleLineSymbol Color="Black" Width="2" Style="Dot"/>
             </esri:ClassBreakInfo>
           
           </esri:ClassBreaksRenderer>
         </esri:FeatureLayer.Renderer>
       </esri:FeatureLayer>
     </esri:Map>
   </Grid>
   
   <Grid x:Name="LayoutRoot">
     
     <!-- 
     Fill Example:
     This example shows how to draw Fills (aka. Polygons) on a FeatureLayer using the ClassBreaksRenderer 
     Class. This example takes two Map controls as arguments to compare the effect of applying a 
     ClassBreaksRenderer. Map1 will show a basic FeatureLayer that comes by default from ArcGIS Server. 
     Map2 will show the same FeatureLayer but with a specific ClassBreaksRenderer applied, to 
     compare the differences.
  -->
  
  <!--
  Display the default FeatureLayer in myMap1:
  Add an ArcGISTiledMapsServiceLayer as a background to the map. Note: The ArcGISTiledMapsServiceLayer 
  layer is first Layer added to the Map's Layers Collection and is drawn on the bottom. A FeatureLayer 
  is then added to the map and draws on top of the background layer.
  Set the Map1 Extent to zoom to the continental United States.
  ->
  <esri:Map Background="White" HorizontalAlignment="Left" Margin="12,227,0,0" 
            Name="Map1" VerticalAlignment="Top" Height="375" Width="375" 
            Extent="-130,10,-70,60" >
    
    <esri:ArcGISTiledMapServiceLayer ID="StreetMapLayer1"
                                     Url="http://services.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer"/>
    
    <!--
    The FeatureLayer contains US States as Fills (aka. Polygons). The Where clause for the 
    FeatureLayer is optional. The Where clause is necessary when more that 500/1000 records 
    returned. In ArcGIS Server 9.3.1 and prior, the default maximum is 500 records returned 
    per FeatureLayer. In ArcGIS Server 10 the default is 1000. This setting is configurable 
    per map service using ArcCatalog or ArcGIS Server Manager (on the Parameters tab). 
    Tip: The syntax "1=1" for the Where clauses returns all records!
    -->
    <esri:FeatureLayer ID="MyFeatureLayer1"
                       Url="http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StatesCitiesRivers_USA/MapServer/2" 
                       Where="1=1" />
  </esri:Map>
  
          
  <!--
  Display the FeatureLayer in myMap2 that has a ClassBreaksRenderer applied:
  Add an ArcGISTiledMapsServiceLayer as a background to the map. Note: The ArcGISTiledMapsServiceLayer 
  layer is first Layer added to the Map's Layers Collection and is drawn on the bottom. A FeatureLayer 
  is then added to the map and draws on top of the background layer.
  Set the Map2 Extent to zoom to the continental United States.
  -->
  <esri:Map Background="White" Height="375" HorizontalAlignment="Left" Margin="408,227,0,0" 
            Name="Map2" VerticalAlignment="Top" Width="375" 
            Extent="-130,10,-70,60" >
    
    <esri:ArcGISTiledMapServiceLayer ID="StreetMapLayer2"
                                     Url="http://services.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer"/>
    
    <!--
    The FeatureLayer contains US States as Fills (aka. Polygons). The Where clause for the 
    FeatureLayer is optional. The Where clause is necessary when more that 500/1000 records 
    returned. In ArcGIS Server 9.3.1 and prior, the default maximum is 500 records returned 
    per FeatureLayer. In ArcGIS Server 10 the default is 1000. This setting is configurable 
    per map service using ArcCatalog or ArcGIS Server Manager (on the Parameters tab). 
    Tip: The syntax "1=1" for the Where clauses returns all records!
    -->
    <esri:FeatureLayer ID="MyFeatureLayer2"
                       Url="http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StatesCitiesRivers_USA/MapServer/2" 
                       Where="1=1" OutFields="*">
         
         <!--
         Create the ClassBreakRenderer. Specify which attribute field (via its string name) 
         the ClassBreaksRenderer will use for breaking the rendering of the Symbols into groups. 
         Note: The Field that is specified for the Field Property MUST be a numeric (Double, 
         Integer, SmallInteger, or Single) Field.FieldType. To Render groups of Strings use
         the UniqueValueRenderer instead.
         -->
         <esri:FeatureLayer.Renderer>
           <esri:ClassBreaksRenderer Field="POP1990">
             
             <!--
             Define a default SimpleLineSymbol for a 'catch all' to draw the features 
             for which no ClassBreaksInfo has been defined. In this example, only states 
             with a population (POP1990) from 1,000,000 to 100,000,000 persons have a 
             defined ClassBreakInfo category and yet all states will be returned. Defining a 
             default SimpleFillSymbol will provide symbology for those features that are 
             greater than 0 but less than 1,000,000. If a ClassBreaksRenderer.DefaultSymbol 
             was not defined these features would not be drawn on the Map.
             -->
             <esri:ClassBreaksRenderer.DefaultSymbol>
               <esri:SimpleFillSymbol Fill="Yellow"/>
             </esri:ClassBreaksRenderer.DefaultSymbol>
             
             <!--
             A ClassBreaksRenderer should have 2 or more ClassBreakInfo Classes (meaning 
             classification or grouping) to delineate the different symbology and class break 
             information. The next three sections of code define 3 different ClassBreakInfo 
             Classes (or groups) and their associated symbology.
             -->
             
             <!--
             Group #1: Create a ClassBreakInfo object as a container of information for each 
             group. Define the minimum and maximum values for the numeric grouping of the 
             Field defined as the ClassBreaksRenderer.Field. Add a description and label.
             -->
             <esri:ClassBreakInfo MinimumValue="1000000" MaximumValue="3000000"
                                     Description="1M to 3M people" Label="A cyan solid fill">
               <esri:SimpleFillSymbol Fill="Cyan"/>
             </esri:ClassBreakInfo>
             
             <!--
             Group #2: Create a ClassBreakInfo object as a container of information for each 
             group. Define the minimum and maximum values for the numeric grouping of the 
             Field defined as the ClassBreaksRenderer.Field. Add a description and label.
             -->
             <esri:ClassBreakInfo MinimumValue="3000000" MaximumValue="10000000"
                                     Description="3M to 10M people" Label="An olive solid fill">
               <esri:SimpleFillSymbol Fill="Olive"/>
             </esri:ClassBreakInfo>
             
             <!--
             Group #3: Create a ClassBreakInfo object as a container of information for each 
             group. Define the minimum and maximum values for the numeric grouping of the 
             Field defined as the ClassBreaksRenderer.Field. Add a description and label.
             -->
             <esri:ClassBreakInfo MinimumValue="10000000" MaximumValue="100000000
                                     Description="10M to 100M people" Label="A black solid fill"">
               <esri:SimpleFillSymbol Fill="Black"/>
             </esri:ClassBreakInfo>
           
           </esri:ClassBreaksRenderer>
         </esri:FeatureLayer.Renderer>
       </esri:FeatureLayer>
     </esri:Map>
   </Grid>
C#Copy Code
public void MarkerClassBreaksRenderer(ESRI.ArcGIS.Client.Map myMap1, ESRI.ArcGIS.Client.Map myMap2)
{
  
  // This example shows how to draw Markers (aka. Points) on a FeatureLayer using the ClassBreaksRenderer 
  // Class. This example takes two Map controls as arguments to compare the effect of applying a 
  // ClassBreaksRenderer. Map1 will show a basic FeatureLayer that comes by default from ArcGIS Server. 
  // Map2 will show the same FeatureLayer but with a specific ClassBreaksRenderer applied, to 
  // compare the differences.
  
  // ---------------------------------------------------------------------------------------------------------------------
  
  // Clear the Layers in the Map's for runs of the function. 
  myMap1.Layers.Clear();
  myMap2.Layers.Clear();
  
  // ---------------------------------------------------------------------------------------------------------------------
  
  // Display the default FeatureLayer in myMap1
  // ==========================================
  
  // Add an ArcGISTiledMapsServiceLayer as a background to the map. Note: The first Layer added to the Map's 
  // Layers Collection is on the bottom and the other Layer is added on the top.
  ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer myArcGISTiledMapServiceLayer1 = new ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer();
  myArcGISTiledMapServiceLayer1.Url = "http://services.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer";
  myMap1.Layers.Add(myArcGISTiledMapServiceLayer1);
  
  
  // Add a FeatureLayer to the map. Note: This Layer is drawn on top of the background layer.
  ESRI.ArcGIS.Client.FeatureLayer myFeatureLayer1 = new ESRI.ArcGIS.Client.FeatureLayer();
  
  // This FeatureLayer contains United States cities as Markers (aka. Points).
  myFeatureLayer1.Url = "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StatesCitiesRivers_USA/MapServer/0";
  
  // The Where clause is optional. It is necessary when more that 500/1000 records returned. In ArcGIS Server 
  // 9.3.1 and prior, the default maximum is 500 records returned per FeatureLayer. In ArcGIS Server 10 the 
  // default is 1000. This setting is configurable per map service using ArcCatalog or ArcGIS Server Manager 
  // (on the Parameters tab). 
  myFeatureLayer1.Where = "POP1990 > 100000";
  
  // Add the myFeatureLayer1 to the Map1 Layer Collection. 
  myMap1.Layers.Add(myFeatureLayer1);
  
  // Zoom to the continental United States.
  ESRI.ArcGIS.Client.Geometry.Envelope myEnvelope1 = new ESRI.ArcGIS.Client.Geometry.Envelope();
  myEnvelope1.XMin = -130;
  myEnvelope1.YMin = 10;
  myEnvelope1.XMax = -70;
  myEnvelope1.YMax = 60;
  myMap1.Extent = myEnvelope1;
  
  // -----------------------------------------------------------------------------------------------------------------------
  
  // Display the FeatureLayer in myMap2 that has a ClassBreaksRenderer applied
  // =========================================================================
  
  // Add an ArcGISTiledMapsServiceLayer as a background to the map. Note: The first Layer added to the Map's 
  // Layers Collection is on the bottom and the other Layer is added on the top.
  ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer myArcGISTiledMapServiceLayer2 = new ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer();
  myArcGISTiledMapServiceLayer2.Url = "http://services.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer";
  myMap2.Layers.Add(myArcGISTiledMapServiceLayer2);
  
  
  // Add a FeatureLayer to the map. Note: This Layer is drawn on top of the background layer.
  ESRI.ArcGIS.Client.FeatureLayer myFeatureLayer2 = new ESRI.ArcGIS.Client.FeatureLayer();
  
  // This FeatureLayer contains United States cities as Markers (aka. Points).
  myFeatureLayer2.Url = "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StatesCitiesRivers_USA/MapServer/0";
  
  // The Where clause is optional. It is necessary when more that 500/1000 records returned. In ArcGIS Server 
  // 9.3.1 and prior, the default maximum is 500 records returned per FeatureLayer. In ArcGIS Server 10 the 
  // default is 1000. This setting is configurable per map service using ArcCatalog or ArcGIS Server Manager 
  // (on the Parameters tab). 
  myFeatureLayer2.Where = "POP1990 > 100000";
  
  // Specify the Outfields Property to specify which Fields are returned on which the 
  // ClassBreaksRenderer.Field can use. Specifying the wildcard (*) character in the Add Property will 
  // return all Fields. 
  myFeatureLayer2.OutFields.Add("POP1990");
  
  // Create the ClassBreakRenderer.
  ESRI.ArcGIS.Client.ClassBreaksRenderer myClassBreaksRenderer = new ESRI.ArcGIS.Client.ClassBreaksRenderer();
  
  // Specify which Field (via its string name) the ClassBreaksRenderer will use for breaking the rendering
  // of the Symbols into groups. Note: The Field that is specified for the Field Property MUST be a
  // numeric (Double, Integer, SmallInteger, or Single) Field.FieldType. To Render groups of Strings use
  // the UniqueValueRenderer instead.
  myClassBreaksRenderer.Field = "POP1990"; // Requires a numeric Field
  
  
  // Define a default SimpleMarkerSymbol for a 'catch all' to draw the features for which no ClassBreaksInfo
  // has been defined. In this example, only cities with a population (POP1990) from 20,000 to 100,000,000 
  // have a defined ClassBreakInfo category and yet all cities with a population greater than 100,000 will
  // be returned. Defining a default SimpleMarkerSymbol will provide symbology for those features that are
  // greater than 100,000 but less than 200,000. If a ClassBreaksRenderer.DefaultSymbol was not defined 
  // these features would not be drawn on the Map.
  ESRI.ArcGIS.Client.Symbols.SimpleMarkerSymbol defaultSimpleMarkerSymbol = new ESRI.ArcGIS.Client.Symbols.SimpleMarkerSymbol();
  System.Windows.Media.SolidColorBrush defaultBrush = new System.Windows.Media.SolidColorBrush(Color.FromArgb(255, 255, 0, 0)); //Red
  defaultSimpleMarkerSymbol.Color = defaultBrush;
  defaultSimpleMarkerSymbol.Size = 3; 
  myClassBreaksRenderer.DefaultSymbol = defaultSimpleMarkerSymbol;
  
  // NOTE: By default if no .Style is specified the is specified for a SimpleMarkerSymbol the
  // ESRI.ArcGIS.Client.Symbols.SimpleMarkerSymbol.SimpleMarkerStyle.Circle is set.
  
  // A ClassBreaksRenderer should have 2 or more ClassBreakInfo Classes (meaning classification or grouping)
  // to delineate the different symbology and class break information. The next three sections of code
  // define 3 different ClassBreakInfo Classes (or groups) and their associated symbology.
  
  // Group #1
  // ========
  // Create a ClassBreakInfo object as a container of information for each group. 
  ESRI.ArcGIS.Client.ClassBreakInfo myClassBreakInfo1 = new ESRI.ArcGIS.Client.ClassBreakInfo();
  
  // Define the minimum and maximum values for the numeric grouping of the Field defined as the
  // ClassBreaksRenderer.Field.
  myClassBreakInfo1.MinimumValue = 200000;
  myClassBreakInfo1.MaximumValue = 300000;
  
  // Add an informational description and label for the group.
  myClassBreakInfo1.Description = "200K to 300K people";
  myClassBreakInfo1.Label = "A cyan circle size 6";
  
  // Each ClassBreakInfo grouping needs a symbol to display
  ESRI.ArcGIS.Client.Symbols.SimpleMarkerSymbol mySimpleMarkerSymbol1 = new ESRI.ArcGIS.Client.Symbols.SimpleMarkerSymbol();
  System.Windows.Media.SolidColorBrush myBrush1 = new System.Windows.Media.SolidColorBrush(Color.FromArgb(255, 0, 255, 255)); //Cyan
  mySimpleMarkerSymbol1.Color = myBrush1;
  mySimpleMarkerSymbol1.Size = 6; 
  myClassBreakInfo1.Symbol = mySimpleMarkerSymbol1;
  
  // Add the ClassBreaksInfo information to the Classes (grouping) of the ClassBreaksRenderer
  myClassBreaksRenderer.Classes.Add(myClassBreakInfo1);
  
  // Group #2
  // ========
  // Create a ClassBreakInfo object as a container of information for each group. 
  ESRI.ArcGIS.Client.ClassBreakInfo myClassBreakInfo2 = new ESRI.ArcGIS.Client.ClassBreakInfo();
  
  // Define the minimum and maximum values for the numeric grouping of the Field defined as the
  // ClassBreaksRenderer.Field.
  myClassBreakInfo2.MinimumValue = 300000;
  myClassBreakInfo2.MaximumValue = 750000;
  
  // Add an informational description and label for the group.
  myClassBreakInfo2.Description = "300K to 750 people";
  myClassBreakInfo2.Label = "An olive triangle size 10";
  
  // Each ClassBreakInfo grouping needs a symbol to display. In this case the SimpleMarkerSymbol Style
  // was specified to be a Triangle (rather than the default Circle).
  ESRI.ArcGIS.Client.Symbols.SimpleMarkerSymbol mySimpleMarkerSymbol2 = new ESRI.ArcGIS.Client.Symbols.SimpleMarkerSymbol();
  System.Windows.Media.SolidColorBrush myBrush2 = new System.Windows.Media.SolidColorBrush(Color.FromArgb(255, 107, 142, 35)); // Olive
  mySimpleMarkerSymbol2.Color = myBrush2;
  mySimpleMarkerSymbol2.Size = 10; 
  mySimpleMarkerSymbol2.Style = ESRI.ArcGIS.Client.Symbols.SimpleMarkerSymbol.SimpleMarkerStyle.Triangle;
  myClassBreakInfo2.Symbol = mySimpleMarkerSymbol2;
  
  // Add the ClassBreaksInfo information to the Classes (grouping) of the ClassBreaksRenderer
  myClassBreaksRenderer.Classes.Add(myClassBreakInfo2);
  
  // Group #3
  // ========
  // Create a ClassBreakInfo object as a container of information for each group. 
  ESRI.ArcGIS.Client.ClassBreakInfo myClassBreakInfo3 = new ESRI.ArcGIS.Client.ClassBreakInfo();
  
  // Define the minimum and maximum values for the numeric grouping of the Field defined as the
  // ClassBreaksRenderer.Field.
  myClassBreakInfo3.MinimumValue = 750000;
  myClassBreakInfo3.MaximumValue = 100000000;
  
  // Add an informational description and label for the group.
  myClassBreakInfo3.Description = "750K to 100M people";
  myClassBreakInfo3.Label = "A black square size 14";
  
  // Each ClassBreakInfo grouping needs a symbol to display. In this case the SimpleMarkerSymbol Style
  // was specified to be a Square (rather than the default Circle).
  ESRI.ArcGIS.Client.Symbols.SimpleMarkerSymbol mySimpleMarkerSymbol3 = new ESRI.ArcGIS.Client.Symbols.SimpleMarkerSymbol();
  System.Windows.Media.SolidColorBrush myBrush3 = new System.Windows.Media.SolidColorBrush(Color.FromArgb(255, 0, 0, 0)); //BLACK
  mySimpleMarkerSymbol3.Color = myBrush3;
  mySimpleMarkerSymbol3.Size = 14;
  mySimpleMarkerSymbol3.Style = ESRI.ArcGIS.Client.Symbols.SimpleMarkerSymbol.SimpleMarkerStyle.Square;
  myClassBreakInfo3.Symbol = mySimpleMarkerSymbol3;
  
  // Add the ClassBreaksInfo information to the Classes (grouping) of the ClassBreaksRenderer
  myClassBreaksRenderer.Classes.Add(myClassBreakInfo3);
  
  // Now that all of the ClassBreakInfo information has been added to the ClassBreaksRenderer object, 
  // associate the ClassBreaksRenderer with the FeatuerLayer.Renderer Property.
  myFeatureLayer2.Renderer = myClassBreaksRenderer;
  
  // Add the myFeatureLayer2 to the Map2 Layer Collection. 
  Map2.Layers.Add(myFeatureLayer2);
  
  // Zoom to the continental United States.
  ESRI.ArcGIS.Client.Geometry.Envelope myEnvelope2 = new ESRI.ArcGIS.Client.Geometry.Envelope();
  myEnvelope2.XMin = -130;
  myEnvelope2.YMin = 10;
  myEnvelope2.XMax = -70;
  myEnvelope2.YMax = 60;
  Map2.Extent = myEnvelope2;
  
}
  
public void LineClassBreaksRenderer(ESRI.ArcGIS.Client.Map myMap1, ESRI.ArcGIS.Client.Map myMap2)
{
  
  // This example shows how to draw Lines (aka. Polylines) on a FeatureLayer using the ClassBreaksRenderer 
  // Class. This example takes two Map controls as arguments to compare the effect of applying a 
  // ClassBreaksRenderer. Map1 will show a basic FeatureLayer that comes by default from ArcGIS Server. 
  // Map2 will show the same FeatureLayer but with a specific ClassBreaksRenderer applied, to 
  // compare the differences.
  
  // ---------------------------------------------------------------------------------------------------------------------
  
  // Clear the Layers in the Map's for runs of the function. 
  myMap1.Layers.Clear();
  myMap2.Layers.Clear();
  
  // ---------------------------------------------------------------------------------------------------------------------
  
  // Display the default FeatureLayer in myMap1
  // ==========================================
  
  // Add an ArcGISTiledMapsServiceLayer as a background to the map. Note: The first Layer added to the Map's 
  // Layers Collection is on the bottom and the other Layer is added on the top.
  ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer myArcGISTiledMapServiceLayer1 = new ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer();
  myArcGISTiledMapServiceLayer1.Url = "http://services.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer";
  myMap1.Layers.Add(myArcGISTiledMapServiceLayer1);
  
  
  // Add a FeatureLayer to the map. Note: This Layer is drawn on top of the background layer.
  ESRI.ArcGIS.Client.FeatureLayer myFeatureLayer1 = new ESRI.ArcGIS.Client.FeatureLayer();
  
  // This FeatureLayer contains United States Interstate roads as Lines (aka. Polylines).
  myFeatureLayer1.Url = "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StateCityHighway_USA/MapServer/0";
  
  // The Where clause is optional. It is necessary when more that 500/1000 records returned. In ArcGIS Server 
  // 9.3.1 and prior, the default maximum is 500 records returned per FeatureLayer. In ArcGIS Server 10 the 
  // default is 1000. This setting is configurable per map service using ArcCatalog or ArcGIS Server Manager 
  // (on the Parameters tab). 
  myFeatureLayer1.Where = "ADMN_Class='Interstate'";
  
  // Add the myFeatureLayer1 to the Map1 Layer Collection. 
  myMap1.Layers.Add(myFeatureLayer1);
  
  // Zoom to the continental United States.
  ESRI.ArcGIS.Client.Geometry.Envelope myEnvelope1 = new ESRI.ArcGIS.Client.Geometry.Envelope();
  myEnvelope1.XMin = -130;
  myEnvelope1.YMin = 10;
  myEnvelope1.XMax = -70;
  myEnvelope1.YMax = 60;
  myMap1.Extent = myEnvelope1;
  
  // -----------------------------------------------------------------------------------------------------------------------
  
  // Display the FeatureLayer in myMap2 that has a ClassBreaksRenderer applied
  // =========================================================================
  
  // Add an ArcGISTiledMapsServiceLayer as a background to the map. Note: The first Layer added to the Map's 
  // Layers Collection is on the bottom and the other Layer is added on the top.
  ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer myArcGISTiledMapServiceLayer2 = new ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer();
  myArcGISTiledMapServiceLayer2.Url = "http://services.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer";
  myMap2.Layers.Add(myArcGISTiledMapServiceLayer2);
  
  
  // Add a FeatureLayer to the map. Note: This Layer is drawn on top of the background layer.
  ESRI.ArcGIS.Client.FeatureLayer myFeatureLayer2 = new ESRI.ArcGIS.Client.FeatureLayer();
  
  // This FeatureLayer contains United States Interstate roads as Lines (aka. Polylines).
  myFeatureLayer2.Url = "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StateCityHighway_USA/MapServer/0";
  
  // The Where clause is optional. It is necessary when more that 500/1000 records returned. In ArcGIS Server 
  // 9.3.1 and prior, the default maximum is 500 records returned per FeatureLayer. In ArcGIS Server 10 the 
  // default is 1000. This setting is configurable per map service using ArcCatalog or ArcGIS Server Manager 
  // (on the Parameters tab). 
  myFeatureLayer2.Where = "ADMN_Class='Interstate'";
  
  // Specify the Outfields Property to specify which Fields are returned on which the 
  // ClassBreaksRenderer.Field can use. Specifying the wildcard (*) character in the Add Property will 
  // return all Fields. 
  myFeatureLayer2.OutFields.Add("LENGTH");
  
  // Create the ClassBreakRenderer.
  ESRI.ArcGIS.Client.ClassBreaksRenderer myClassBreaksRenderer = new ESRI.ArcGIS.Client.ClassBreaksRenderer();
  
  // Specify which Field (via its string name) the ClassBreaksRenderer will use for breaking the rendering
  // of the Symbols into groups. Note: The Field that is specified for the Field Property MUST be a
  // numeric (Double, Integer, SmallInteger, or Single) Field.FieldType. To Render groups of Strings use
  // the UniqueValueRenderer instead.
  myClassBreaksRenderer.Field = "LENGTH"; // Requires a numeric Field
  
  
  // Define a default SimpleLineSymbol for a 'catch all' to draw the features for which no ClassBreaksInfo
  // has been defined. In this example, only Interstate roads with a road-length (LENGTH) from 50 to 1,000 
  // miles have a defined ClassBreakInfo category and yet all the Interstate roads will be returned (really 
  // only the first 500 features are returned due to the ArcGIS Service configuration). Defining a default 
  // SimpleLineSymbol will provide symbology for those features that have road lengths greater than 0 but 
  // less than 50 miles long. If a ClassBreaksRenderer.DefaultSymbol was not defined these features would 
  // not be drawn on the Map.
  ESRI.ArcGIS.Client.Symbols.SimpleLineSymbol defaultSimpleLineSymbol = new ESRI.ArcGIS.Client.Symbols.SimpleLineSymbol();
  System.Windows.Media.SolidColorBrush defaultBrush = new System.Windows.Media.SolidColorBrush(Color.FromArgb(255, 255, 255, 0)); //Yellow
  defaultSimpleLineSymbol.Color = defaultBrush;
  defaultSimpleLineSymbol.Width = 5; 
  myClassBreaksRenderer.DefaultSymbol = defaultSimpleLineSymbol;
  
  // NOTE: By default if no .LineStyle is specified the is specified for a SimpleLineSymbol the
  // ESRI.ArcGIS.Client.Symbols.SimpleLineSymbol.LineStyle.Solid is set.
  
  // A ClassBreaksRenderer should have 2 or more ClassBreakInfo Classes (meaning classification or grouping)
  // to delineate the different symbology and class break information. The next three sections of code
  // define 3 different ClassBreakInfo Classes (or groups) and their associated symbology.
  
  // Group #1
  // ========
  // Create a ClassBreakInfo object as a container of information for each group. 
  ESRI.ArcGIS.Client.ClassBreakInfo myClassBreakInfo1 = new ESRI.ArcGIS.Client.ClassBreakInfo();
  
  // Define the minimum and maximum values for the numeric grouping of the Field defined as the
  // ClassBreaksRenderer.Field.
  myClassBreakInfo1.MinimumValue = 50;
  myClassBreakInfo1.MaximumValue = 100;
  
  // Add an informational description and label for the group.
  myClassBreakInfo1.Description = "50 to 100 miles long";
  myClassBreakInfo1.Label = "A cyan solid line, width 3";
  
  // Each ClassBreakInfo grouping needs a symbol to display
  ESRI.ArcGIS.Client.Symbols.SimpleLineSymbol mySimpleLineSymbol1 = new ESRI.ArcGIS.Client.Symbols.SimpleLineSymbol();
  System.Windows.Media.SolidColorBrush myBrush1 = new System.Windows.Media.SolidColorBrush(Color.FromArgb(255, 0, 255, 255)); //Cyan
  mySimpleLineSymbol1.Color = myBrush1;
  mySimpleLineSymbol1.Width = 3; 
  myClassBreakInfo1.Symbol = mySimpleLineSymbol1;
  
  // Add the ClassBreaksInfo information to the Classes (grouping) of the ClassBreaksRenderer
  myClassBreaksRenderer.Classes.Add(myClassBreakInfo1);
  
  // Group #2
  // ========
  // Create a ClassBreakInfo object as a container of information for each group. 
  ESRI.ArcGIS.Client.ClassBreakInfo myClassBreakInfo2 = new ESRI.ArcGIS.Client.ClassBreakInfo();
  
  // Define the minimum and maximum values for the numeric grouping of the Field defined as the
  // ClassBreaksRenderer.Field.
  myClassBreakInfo2.MinimumValue = 100;
  myClassBreakInfo2.MaximumValue = 200;
  
  // Add an informational description and label for the group.
  myClassBreakInfo2.Description = "100 to 200 miles long";
  myClassBreakInfo2.Label = "An olive dash line, width 1";
  
  // Each ClassBreakInfo grouping needs a symbol to display. In this case the SimpleLineSymbol LineStyle
  // was specified to be a Dash (rather than the default Solid).
  ESRI.ArcGIS.Client.Symbols.SimpleLineSymbol mySimpleLineSymbol2 = new ESRI.ArcGIS.Client.Symbols.SimpleLineSymbol();
  System.Windows.Media.SolidColorBrush myBrush2 = new System.Windows.Media.SolidColorBrush(Color.FromArgb(255, 107, 142, 35)); // Olive
  mySimpleLineSymbol2.Color = myBrush2;
  mySimpleLineSymbol2.Width = 1; 
  mySimpleLineSymbol2.Style = ESRI.ArcGIS.Client.Symbols.SimpleLineSymbol.LineStyle.Dash;
  myClassBreakInfo2.Symbol = mySimpleLineSymbol2;
  
  // Add the ClassBreaksInfo information to the Classes (grouping) of the ClassBreaksRenderer
  myClassBreaksRenderer.Classes.Add(myClassBreakInfo2);
  
  // Group #3
  // ========
  // Create a ClassBreakInfo object as a container of information for each group. 
  ESRI.ArcGIS.Client.ClassBreakInfo myClassBreakInfo3 = new ESRI.ArcGIS.Client.ClassBreakInfo();
  
  // Define the minimum and maximum values for the numeric grouping of the Field defined as the
  // ClassBreaksRenderer.Field.
  myClassBreakInfo3.MinimumValue = 200;
  myClassBreakInfo3.MaximumValue = 1000;
  
  // Add an informational description and label for the group.
  myClassBreakInfo3.Description = "200 to 1000 miles long";
  myClassBreakInfo3.Label = "A black dot line, width 2";
  
  // Each ClassBreakInfo grouping needs a symbol to display. In this case the SimpleLineSymbol LineStyle
  // was specified to be a Dot (rather than the default Solid).
  ESRI.ArcGIS.Client.Symbols.SimpleLineSymbol mySimpleLineSymbol3 = new ESRI.ArcGIS.Client.Symbols.SimpleLineSymbol();
  System.Windows.Media.SolidColorBrush myBrush3 = new System.Windows.Media.SolidColorBrush(Color.FromArgb(255, 0, 0, 0)); //Black
  mySimpleLineSymbol3.Color = myBrush3;
  mySimpleLineSymbol3.Width = 2; 
  mySimpleLineSymbol3.Style = ESRI.ArcGIS.Client.Symbols.SimpleLineSymbol.LineStyle.Dot;
  myClassBreakInfo3.Symbol = mySimpleLineSymbol3;
  
  // Add the ClassBreaksInfo information to the Classes (grouping) of the ClassBreaksRenderer
  myClassBreaksRenderer.Classes.Add(myClassBreakInfo3);
  
  // Now that all of the ClassBreakInfo information has been added to the ClassBreaksRenderer object, 
  // associate the ClassBreaksRenderer with the FeatuerLayer.Renderer Property.
  myFeatureLayer2.Renderer = myClassBreaksRenderer;
  
  // Add the myFeatureLayer2 to the Map2 Layer Collection. 
  Map2.Layers.Add(myFeatureLayer2);
  
  // Zoom to the continental United States.
  ESRI.ArcGIS.Client.Geometry.Envelope myEnvelope2 = new ESRI.ArcGIS.Client.Geometry.Envelope();
  myEnvelope2.XMin = -130;
  myEnvelope2.YMin = 10;
  myEnvelope2.XMax = -70;
  myEnvelope2.YMax = 60;
  Map2.Extent = myEnvelope2;
  
}
  
public void FillClassBreaksRenderer(ESRI.ArcGIS.Client.Map myMap1, ESRI.ArcGIS.Client.Map myMap2)
{
  
  // This example shows how to draw Fills (aka. Polygons) on a FeatureLayer using the ClassBreaksRenderer 
  // Class. This example takes two Map controls as arguments to compare the effect of applying a 
  // ClassBreaksRenderer. Map1 will show a basic FeatureLayer that comes by default from ArcGIS Server. 
  // Map2 will show the same FeatureLayer but with a specific ClassBreaksRenderer applied, to 
  // compare the differences.
  
  // ---------------------------------------------------------------------------------------------------------------------
  
  // Clear the Layers in the Map's for runs of the function. 
  myMap1.Layers.Clear();
  myMap2.Layers.Clear();
  
  // ---------------------------------------------------------------------------------------------------------------------
  
  // Display the default FeatureLayer in myMap1
  // ==========================================
  
  // Add an ArcGISTiledMapsServiceLayer as a background to the map. Note: The first Layer added to the Map's 
  // Layers Collection is on the bottom and the other Layer is added on the top.
  ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer myArcGISTiledMapServiceLayer1 = new ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer();
  myArcGISTiledMapServiceLayer1.Url = "http://services.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer";
  myMap1.Layers.Add(myArcGISTiledMapServiceLayer1);
  
  
  // Add a FeatureLayer to the map. Note: This Layer is drawn on top of the background layer.
  ESRI.ArcGIS.Client.FeatureLayer myFeatureLayer1 = new ESRI.ArcGIS.Client.FeatureLayer();
  
  // This FeatureLayer contains US states as Fills (aka. Polygons).
  myFeatureLayer1.Url = "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StatesCitiesRivers_USA/MapServer/2";
  
  // The Where clause is optional. It is necessary when more that 500/1000 records returned. In ArcGIS Server 
  // 9.3.1 and prior, the default maximum is 500 records returned per FeatureLayer. In ArcGIS Server 10 the 
  // default is 1000. This setting is configurable per map service using ArcCatalog or ArcGIS Server Manager 
  // (on the Parameters tab). 
  myFeatureLayer1.Where = "1=1"; // Tip: The syntax "1=1" returns all records!
  
  // Add the myFeatureLayer1 to the Map1 Layer Collection. 
  myMap1.Layers.Add(myFeatureLayer1);
  
  // Zoom to the continental United States.
  ESRI.ArcGIS.Client.Geometry.Envelope myEnvelope1 = new ESRI.ArcGIS.Client.Geometry.Envelope();
  myEnvelope1.XMin = -130;
  myEnvelope1.YMin = 10;
  myEnvelope1.XMax = -70;
  myEnvelope1.YMax = 60;
  myMap1.Extent = myEnvelope1;
  
  // -----------------------------------------------------------------------------------------------------------------------
  
  // Display the FeatureLayer in myMap2 that has a ClassBreaksRenderer applied
  // =========================================================================
  
  // Add an ArcGISTiledMapsServiceLayer as a background to the map. Note: The first Layer added to the Map's 
  // Layers Collection is on the bottom and the other Layer is added on the top.
  ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer myArcGISTiledMapServiceLayer2 = new ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer();
  myArcGISTiledMapServiceLayer2.Url = "http://services.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer";
  myMap2.Layers.Add(myArcGISTiledMapServiceLayer2);
  
  
  // Add a FeatureLayer to the map. Note: This Layer is drawn on top of the background layer.
  ESRI.ArcGIS.Client.FeatureLayer myFeatureLayer2 = new ESRI.ArcGIS.Client.FeatureLayer();
  
  // This FeatureLayer contains US states as Fills (aka. Polygons).
  myFeatureLayer2.Url = "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StatesCitiesRivers_USA/MapServer/2";
  
  // The Where clause is optional. It is necessary when more that 500/1000 records returned. In ArcGIS Server 
  // 9.3.1 and prior, the default maximum is 500 records returned per FeatureLayer. In ArcGIS Server 10 the 
  // default is 1000. This setting is configurable per map service using ArcCatalog or ArcGIS Server Manager 
  // (on the Parameters tab). 
  myFeatureLayer2.Where = "1=1"; // Tip: The syntax "1=1" returns all records!
  
  // Specify the Outfields Property to specify which Fields are returned on which the 
  // ClassBreaksRenderer.Field can use. Specifying the wildcard (*) character in the Add Property will 
  // return all Fields. 
  myFeatureLayer2.OutFields.Add("*");
  
  // Create the ClassBreakRenderer.
  ESRI.ArcGIS.Client.ClassBreaksRenderer myClassBreaksRenderer = new ESRI.ArcGIS.Client.ClassBreaksRenderer();
  
  // Specify which Field (via its string name) the ClassBreaksRenderer will use for breaking the rendering
  // of the Symbols into groups. Note: The Field that is specified for the Field Property MUST be a
  // numeric (Double, Integer, SmallInteger, or Single) Field.FieldType. To Render groups of Strings use
  // the UniqueValueRenderer instead.
  myClassBreaksRenderer.Field = "POP1990"; // Requires a numeric Field
  
  
  // Define a default SimpleFillSymbol for a 'catch all' to draw the features for which no ClassBreaksInfo
  // has been defined. In this example, only states with a population (POP1990) from 1,000,000 to 100,000,000 
  // persons have a defined ClassBreakInfo category and yet all states will be returned. Defining a default 
  // SimpleFillSymbol will provide symbology for those features that are greater than 0 but less than 
  // 1,000,000. If a ClassBreaksRenderer.DefaultSymbol was not defined these features would not be drawn on 
  // the Map.
  ESRI.ArcGIS.Client.Symbols.SimpleFillSymbol defaultSimpleFillSymbol = new ESRI.ArcGIS.Client.Symbols.SimpleFillSymbol();
  System.Windows.Media.SolidColorBrush defaultBrush = new System.Windows.Media.SolidColorBrush(Color.FromArgb(255, 255, 255, 0)); //Yellow
  defaultSimpleFillSymbol.Fill = defaultBrush;
  myClassBreaksRenderer.DefaultSymbol = defaultSimpleFillSymbol;
  
  
  // A ClassBreaksRenderer should have 2 or more ClassBreakInfo Classes (meaning classification or grouping)
  // to delineate the different symbology and class break information. The next three sections of code
  // define 3 different ClassBreakInfo Classes (or groups) and their associated symbology.
  
  // Group #1
  // ========
  // Create a ClassBreakInfo object as a container of information for each group. 
  ESRI.ArcGIS.Client.ClassBreakInfo myClassBreakInfo1 = new ESRI.ArcGIS.Client.ClassBreakInfo();
  
  // Define the minimum and maximum values for the numeric grouping of the Field defined as the
  // ClassBreaksRenderer.Field.
  myClassBreakInfo1.MinimumValue = 1000000;
  myClassBreakInfo1.MaximumValue = 3000000;
  
  // Add an informational description and label for the group.
  myClassBreakInfo1.Description = "1M to 3M people";
  myClassBreakInfo1.Label = "A cyan solid fill";
  
  // Each ClassBreakInfo grouping needs a symbol to display
  ESRI.ArcGIS.Client.Symbols.SimpleFillSymbol mySimpleFillSymbol1 = new ESRI.ArcGIS.Client.Symbols.SimpleFillSymbol();
  System.Windows.Media.SolidColorBrush myBrush1 = new System.Windows.Media.SolidColorBrush(Color.FromArgb(255, 0, 255, 255)); //Cyan
  mySimpleFillSymbol1.Fill = myBrush1;
  myClassBreakInfo1.Symbol = mySimpleFillSymbol1;
  
  // Add the ClassBreaksInfo information to the Classes (grouping) of the ClassBreaksRenderer
  myClassBreaksRenderer.Classes.Add(myClassBreakInfo1);
  
  // Group #2
  // ========
  // Create a ClassBreakInfo object as a container of information for each group. 
  ESRI.ArcGIS.Client.ClassBreakInfo myClassBreakInfo2 = new ESRI.ArcGIS.Client.ClassBreakInfo();
  
  // Define the minimum and maximum values for the numeric grouping of the Field defined as the
  // ClassBreaksRenderer.Field.
  myClassBreakInfo2.MinimumValue = 3000000;
  myClassBreakInfo2.MaximumValue = 10000000;
  
  // Add an informational description and label for the group.
  myClassBreakInfo2.Description = "3M to 10M people";
  myClassBreakInfo2.Label = "An olive solid fill";
  
  // Each ClassBreakInfo grouping needs a symbol to display. 
  ESRI.ArcGIS.Client.Symbols.SimpleFillSymbol mySimpleFillSymbol2 = new ESRI.ArcGIS.Client.Symbols.SimpleFillSymbol();
  System.Windows.Media.SolidColorBrush myBrush2 = new System.Windows.Media.SolidColorBrush(Color.FromArgb(255, 107, 142, 35)); // Olive
  mySimpleFillSymbol2.Fill = myBrush2;
  myClassBreakInfo2.Symbol = mySimpleFillSymbol2;
  
  // Add the ClassBreaksInfo information to the Classes (grouping) of the ClassBreaksRenderer
  myClassBreaksRenderer.Classes.Add(myClassBreakInfo2);
  
  // Group #3
  // ========
  // Create a ClassBreakInfo object as a container of information for each group. 
  ESRI.ArcGIS.Client.ClassBreakInfo myClassBreakInfo3 = new ESRI.ArcGIS.Client.ClassBreakInfo();
  
  // Define the minimum and maximum values for the numeric grouping of the Field defined as the
  // ClassBreaksRenderer.Field.
  myClassBreakInfo3.MinimumValue = 10000000;
  myClassBreakInfo3.MaximumValue = 100000000;
  
  // Add an informational description and label for the group.
  myClassBreakInfo3.Description = "10M to 100M people";
  myClassBreakInfo3.Label = "A black solid fill";
  
  // Each ClassBreakInfo grouping needs a symbol to display. 
  ESRI.ArcGIS.Client.Symbols.SimpleFillSymbol mySimpleFillSymbol3 = new ESRI.ArcGIS.Client.Symbols.SimpleFillSymbol();
  System.Windows.Media.SolidColorBrush myBrush3 = new System.Windows.Media.SolidColorBrush(Color.FromArgb(255, 0, 0, 0)); //BLACK
  mySimpleFillSymbol3.Fill = myBrush3;
  myClassBreakInfo3.Symbol = mySimpleFillSymbol3;
  
  // Add the ClassBreaksInfo information to the Classes (grouping) of the ClassBreaksRenderer
  myClassBreaksRenderer.Classes.Add(myClassBreakInfo3);
  
  // Now that all of the ClassBreakInfo information has been added to the ClassBreaksRenderer object, 
  // associate the ClassBreaksRenderer with the FeatuerLayer.Renderer Property.
  myFeatureLayer2.Renderer = myClassBreaksRenderer;
  
  // Add the myFeatureLayer2 to the Map2 Layer Collection. 
  Map2.Layers.Add(myFeatureLayer2);
  
  // Zoom to the continental United States.
  ESRI.ArcGIS.Client.Geometry.Envelope myEnvelope2 = new ESRI.ArcGIS.Client.Geometry.Envelope();
  myEnvelope2.XMin = -130;
  myEnvelope2.YMin = 10;
  myEnvelope2.XMax = -70;
  myEnvelope2.YMax = 60;
  Map2.Extent = myEnvelope2;
  
}
VB.NETCopy Code
Public Sub MarkerClassBreaksRenderer(ByVal myMap1 As ESRI.ArcGIS.Client.Map, ByVal myMap2 As ESRI.ArcGIS.Client.Map)
             	
  ' This example shows how to draw Markers (aka. Points) on a FeatureLayer using the ClassBreaksRenderer 
  ' Class. This example takes two Map controls as arguments to compare the effect of applying a 
  ' ClassBreaksRenderer. Map1 will show a basic FeatureLayer that comes by default from ArcGIS Server. 
  ' Map2 will show the same FeatureLayer but with a specific ClassBreaksRenderer applied, to 
  ' compare the differences.
  
  ' ---------------------------------------------------------------------------------------------------------------------
  
  ' Clear the Layers in the Map's for runs of the function. 
  myMap1.Layers.Clear()
  myMap2.Layers.Clear()
  
  ' ---------------------------------------------------------------------------------------------------------------------
  
  ' Display the default FeatureLayer in myMap1
  ' ==========================================
  
  ' Add an ArcGISTiledMapsServiceLayer as a background to the map. Note: The first Layer added to the Map's 
  ' Layers Collection is on the bottom and the other Layer is added on the top.
  Dim myArcGISTiledMapServiceLayer1 As New ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer
  myArcGISTiledMapServiceLayer1.Url = "http://services.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer"
  myMap1.Layers.Add(myArcGISTiledMapServiceLayer1)
  
  
  ' Add a FeatureLayer to the map. Note: This Layer is drawn on top of the background layer.
     Dim myFeatureLayer1 As New ESRI.ArcGIS.Client.FeatureLayer
  
     ' This FeatureLayer contains United States cities as Markers (aka. Points).
     myFeatureLayer1.Url = "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StatesCitiesRivers_USA/MapServer/0"
  
     ' The Where clause is optional. It is necessary when more that 500/1000 records returned. In ArcGIS Server 
     ' 9.3.1 and prior, the default maximum is 500 records returned per FeatureLayer. In ArcGIS Server 10 the 
     ' default is 1000. This setting is configurable per map service using ArcCatalog or ArcGIS Server Manager 
     ' (on the Parameters tab). 
     myFeatureLayer1.Where = "POP1990 > 100000"
  
     ' Add the myFeatureLayer1 to the Map1 Layer Collection. 
     myMap1.Layers.Add(myFeatureLayer1)
  
     ' Zoom to the continental United States.
     Dim myEnvelope1 As New ESRI.ArcGIS.Client.Geometry.Envelope
     myEnvelope1.XMin = -130
     myEnvelope1.YMin = 10
     myEnvelope1.XMax = -70
     myEnvelope1.YMax = 60
     myMap1.Extent = myEnvelope1
  
     ' -----------------------------------------------------------------------------------------------------------------------
  
     ' Display the FeatureLayer in myMap2 that has a ClassBreaksRenderer applied
     ' =========================================================================
  
     ' Add an ArcGISTiledMapsServiceLayer as a background to the map. Note: The first Layer added to the Map's 
     ' Layers Collection is on the bottom and the other Layer is added on the top.
     Dim myArcGISTiledMapServiceLayer2 As New ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer
     myArcGISTiledMapServiceLayer2.Url = "http://services.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer"
     myMap2.Layers.Add(myArcGISTiledMapServiceLayer2)
  
  
     ' Add a FeatureLayer to the map. Note: This Layer is drawn on top of the background layer.
     Dim myFeatureLayer2 As New ESRI.ArcGIS.Client.FeatureLayer
  
     ' This FeatureLayer contains United States cities as Markers (aka. Points).
     myFeatureLayer2.Url = "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StatesCitiesRivers_USA/MapServer/0"
  
     ' The Where clause is optional. It is necessary when more that 500/1000 records returned. In ArcGIS Server 
     ' 9.3.1 and prior, the default maximum is 500 records returned per FeatureLayer. In ArcGIS Server 10 the 
     ' default is 1000. This setting is configurable per map service using ArcCatalog or ArcGIS Server Manager 
     ' (on the Parameters tab). 
     myFeatureLayer2.Where = "POP1990 > 100000"
  
     ' Specify the Outfields Property to specify which Fields are returned on which the 
     ' ClassBreaksRenderer.Field can use. Specifying the wildcard (*) character in the Add Property will 
     ' return all Fields. 
     myFeatureLayer2.OutFields.Add("POP1990")
  
     ' Create the ClassBreakRenderer.
     Dim myClassBreaksRenderer As New ESRI.ArcGIS.Client.ClassBreaksRenderer
  
     ' Specify which Field (via its string name) the ClassBreaksRenderer will use for breaking the rendering
     ' of the Symbols into groups. Note: The Field that is specified for the Field Property MUST be a
     ' numeric (Double, Integer, SmallInteger, or Single) Field.FieldType. To Render groups of Strings use
     ' the UniqueValueRenderer instead.
     myClassBreaksRenderer.Field = "POP1990" ' Requires a numeric Field
  
  
     ' Define a default SimpleMarkerSymbol for a 'catch all' to draw the features for which no ClassBreaksInfo
     ' has been defined. In this example, only cities with a population (POP1990) from 20,000 to 100,000,000 
     ' have a defined ClassBreakInfo category and yet all cities with a population greater than 100,000 will
     ' be returned. Defining a default SimpleMarkerSymbol will provide symbology for those features that are
     ' greater than 100,000 but less than 200,000. If a ClassBreaksRenderer.DefaultSymbol was not defined 
     ' these features would not be drawn on the Map.
     Dim defaultSimpleMarkerSymbol As New ESRI.ArcGIS.Client.Symbols.SimpleMarkerSymbol
     Dim defaultBrush As New System.Windows.Media.SolidColorBrush(Color.FromArgb(255, 255, 0, 0)) 'Red
     defaultSimpleMarkerSymbol.Color = defaultBrush
     defaultSimpleMarkerSymbol.Size = 3 ' Defining the size of the SimpleMarkerSymbol is optional.
     myClassBreaksRenderer.DefaultSymbol = defaultSimpleMarkerSymbol
  
     ' NOTE: By default if no .Style is specified the is specified for a SimpleMarkerSymbol the
     ' ESRI.ArcGIS.Client.Symbols.SimpleMarkerSymbol.SimpleMarkerStyle.Circle is set.
  
     ' A ClassBreaksRenderer should have 2 or more ClassBreakInfo Classes (meaning classification or grouping)
     ' to delineate the different symbology and class break information. The next three sections of code
     ' define 3 different ClassBreakInfo Classes (or groups) and their associated symbology.
  
     ' Group #1
     ' ========
     ' Create a ClassBreakInfo object as a container of information for each group. 
     Dim myClassBreakInfo1 As New ESRI.ArcGIS.Client.ClassBreakInfo
  
     ' Define the minimum and maximum values for the numeric grouping of the Field defined as the
     ' ClassBreaksRenderer.Field.
     myClassBreakInfo1.MinimumValue = 200000
     myClassBreakInfo1.MaximumValue = 300000
     
     ' Add an informational description and label for the group.
     myClassBreakInfo1.Description = "200K to 300K people"
     myClassBreakInfo1.Label = "A cyan circle size 6"
     
     ' Each ClassBreakInfo grouping needs a symbol to display
     Dim mySimpleMarkerSymbol1 As New ESRI.ArcGIS.Client.Symbols.SimpleMarkerSymbol
     Dim myBrush1 As New System.Windows.Media.SolidColorBrush(Color.FromArgb(255, 0, 255, 255)) 'Cyan
     mySimpleMarkerSymbol1.Color = myBrush1
     mySimpleMarkerSymbol1.Size = 6
     myClassBreakInfo1.Symbol = mySimpleMarkerSymbol1
  
     ' Add the ClassBreaksInfo information to the Classes (grouping) of the ClassBreaksRenderer
     myClassBreaksRenderer.Classes.Add(myClassBreakInfo1)
  
     ' Group #2
     ' ========
     ' Create a ClassBreakInfo object as a container of information for each group. 
     Dim myClassBreakInfo2 As New ESRI.ArcGIS.Client.ClassBreakInfo
  
     ' Define the minimum and maximum values for the numeric grouping of the Field defined as the
     ' ClassBreaksRenderer.Field.
     myClassBreakInfo2.MinimumValue = 300000
     myClassBreakInfo2.MaximumValue = 750000
     
     ' Add an informational description and label for the group.
     myClassBreakInfo2.Description = "300K to 750 people"
     myClassBreakInfo2.Label = "An olive triangle size 10"
     
     ' Each ClassBreakInfo grouping needs a symbol to display. In this case the SimpleMarkerSymbol Style
     ' was specified to be a Triangle (rather than the default Circle).
     Dim mySimpleMarkerSymbol2 As New ESRI.ArcGIS.Client.Symbols.SimpleMarkerSymbol
     Dim myBrush2 As New System.Windows.Media.SolidColorBrush(Color.FromArgb(255, 107, 142, 35)) ' Olive
     mySimpleMarkerSymbol2.Color = myBrush2
     mySimpleMarkerSymbol2.Size = 10
     mySimpleMarkerSymbol2.Style = ESRI.ArcGIS.Client.Symbols.SimpleMarkerSymbol.SimpleMarkerStyle.Triangle
     myClassBreakInfo2.Symbol = mySimpleMarkerSymbol2
  
     ' Add the ClassBreaksInfo information to the Classes (grouping) of the ClassBreaksRenderer
     myClassBreaksRenderer.Classes.Add(myClassBreakInfo2)
  
     ' Group #3
     ' ========
     ' Create a ClassBreakInfo object as a container of information for each group. 
     Dim myClassBreakInfo3 As New ESRI.ArcGIS.Client.ClassBreakInfo
  
     ' Define the minimum and maximum values for the numeric grouping of the Field defined as the
     ' ClassBreaksRenderer.Field.
     myClassBreakInfo3.MinimumValue = 750000
     myClassBreakInfo3.MaximumValue = 100000000
     
     ' Add an informational description and label for the group.
     myClassBreakInfo3.Description = "750K to 100M people"
     myClassBreakInfo3.Label = "A black square size 14"
  
     ' Each ClassBreakInfo grouping needs a symbol to display. In this case the SimpleMarkerSymbol Style
     ' was specified to be a Square (rather than the default Circle).
     Dim mySimpleMarkerSymbol3 As New ESRI.ArcGIS.Client.Symbols.SimpleMarkerSymbol
     Dim myBrush3 As New System.Windows.Media.SolidColorBrush(Color.FromArgb(255, 0, 0, 0)) 'BLACK
     mySimpleMarkerSymbol3.Color = myBrush3
     mySimpleMarkerSymbol3.Size = 14
     mySimpleMarkerSymbol3.Style = ESRI.ArcGIS.Client.Symbols.SimpleMarkerSymbol.SimpleMarkerStyle.Square
     myClassBreakInfo3.Symbol = mySimpleMarkerSymbol3
  
     ' Add the ClassBreaksInfo information to the Classes (grouping) of the ClassBreaksRenderer
     myClassBreaksRenderer.Classes.Add(myClassBreakInfo3)
  
     ' Now that all of the ClassBreakInfo information has been added to the ClassBreaksRenderer object, 
     ' associate the ClassBreaksRenderer with the FeatuerLayer.Renderer Property.
     myFeatureLayer2.Renderer = myClassBreaksRenderer
  
     ' Add the myFeatureLayer2 to the Map2 Layer Collection. 
     Map2.Layers.Add(myFeatureLayer2)
  
     ' Zoom to the continental United States.
     Dim myEnvelope2 As New ESRI.ArcGIS.Client.Geometry.Envelope
     myEnvelope2.XMin = -130
     myEnvelope2.YMin = 10
     myEnvelope2.XMax = -70
     myEnvelope2.YMax = 60
     Map2.Extent = myEnvelope2
  
   End Sub
  
   Public Sub LineClassBreaksRenderer(ByVal myMap1 As ESRI.ArcGIS.Client.Map, ByVal myMap2 As ESRI.ArcGIS.Client.Map)
  
     ' This example shows how to draw Lines (aka. Polylines) on a FeatureLayer using the ClassBreaksRenderer 
     ' Class. This example takes two Map controls as arguments to compare the effect of applying a 
     ' ClassBreaksRenderer. Map1 will show a basic FeatureLayer that comes by default from ArcGIS Server. 
     ' Map2 will show the same FeatureLayer but with a specific ClassBreaksRenderer applied, to 
     ' compare the differences.
  
     ' ---------------------------------------------------------------------------------------------------------------------
     
     ' Clear the Layers in the Map's for runs of the function. 
     myMap1.Layers.Clear()
     myMap2.Layers.Clear()
  
     ' ---------------------------------------------------------------------------------------------------------------------
  
     ' Display the default FeatureLayer in myMap1
     ' ==========================================
  
     ' Add an ArcGISTiledMapsServiceLayer as a background to the map. Note: The first Layer added to the Map's 
     ' Layers Collection is on the bottom and the other Layer is added on the top.
     Dim myArcGISTiledMapServiceLayer1 As New ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer
     myArcGISTiledMapServiceLayer1.Url = "http://services.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer"
     myMap1.Layers.Add(myArcGISTiledMapServiceLayer1)
  
  
     ' Add a FeatureLayer to the map. Note: This Layer is drawn on top of the background layer.
     Dim myFeatureLayer1 As New ESRI.ArcGIS.Client.FeatureLayer
  
     ' This FeatureLayer contains United States Interstate roads as Lines (aka. Polylines).
     myFeatureLayer1.Url = "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StateCityHighway_USA/MapServer/0"
  
     ' The Where clause is optional. It is necessary when more that 500/1000 records returned. In ArcGIS Server 
     ' 9.3.1 and prior, the default maximum is 500 records returned per FeatureLayer. In ArcGIS Server 10 the 
     ' default is 1000. This setting is configurable per map service using ArcCatalog or ArcGIS Server Manager 
     ' (on the Parameters tab). 
     myFeatureLayer1.Where = "ADMN_Class='Interstate'"
  
     ' Add the myFeatureLayer1 to the Map1 Layer Collection. 
     myMap1.Layers.Add(myFeatureLayer1)
  
     ' Zoom to the continental United States.
     Dim myEnvelope1 As New ESRI.ArcGIS.Client.Geometry.Envelope
     myEnvelope1.XMin = -130
     myEnvelope1.YMin = 10
     myEnvelope1.XMax = -70
     myEnvelope1.YMax = 60
     myMap1.Extent = myEnvelope1
  
     ' -----------------------------------------------------------------------------------------------------------------------
     /// 	  
     ' Display the FeatureLayer in myMap2 that has a ClassBreaksRenderer applied
     ' =========================================================================
  
     ' Add an ArcGISTiledMapsServiceLayer as a background to the map. Note: The first Layer added to the Map's 
     ' Layers Collection is on the bottom and the other Layer is added on the top.
     Dim myArcGISTiledMapServiceLayer2 As New ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer
     myArcGISTiledMapServiceLayer2.Url = "http://services.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer"
     myMap2.Layers.Add(myArcGISTiledMapServiceLayer2)
  
  
     ' Add a FeatureLayer to the map. Note: This Layer is drawn on top of the background layer.
     Dim myFeatureLayer2 As New ESRI.ArcGIS.Client.FeatureLayer
  
     ' This FeatureLayer contains United States Interstate roads as Lines (aka. Polylines).
     myFeatureLayer2.Url = "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StateCityHighway_USA/MapServer/0"
  
     ' The Where clause is optional. It is necessary when more that 500/1000 records returned. In ArcGIS Server 
     ' 9.3.1 and prior, the default maximum is 500 records returned per FeatureLayer. In ArcGIS Server 10 the 
     ' default is 1000. This setting is configurable per map service using ArcCatalog or ArcGIS Server Manager 
     ' (on the Parameters tab). 
     myFeatureLayer2.Where = "ADMN_Class='Interstate'"
  
     ' Specify the Outfields Property to specify which Fields are returned on which the 
     ' ClassBreaksRenderer.Field can use. Specifying the wildcard (*) character in the Add Property will 
     ' return all Fields. 
     myFeatureLayer2.OutFields.Add("LENGTH")
  
     ' Create the ClassBreakRenderer.
     Dim myClassBreaksRenderer As New ESRI.ArcGIS.Client.ClassBreaksRenderer
  
     ' Specify which Field (via its string name) the ClassBreaksRenderer will use for breaking the rendering
     ' of the Symbols into groups. Note: The Field that is specified for the Field Property MUST be a
     ' numeric (Double, Integer, SmallInteger, or Single) Field.FieldType. To Render groups of Strings use
     ' the UniqueValueRenderer instead.
     myClassBreaksRenderer.Field = "LENGTH" ' Requires a numeric Field
  
  
     ' Define a default SimpleLineSymbol for a 'catch all' to draw the features for which no ClassBreaksInfo
     ' has been defined. In this example, only Interstate roads with a road-length (LENGTH) from 50 to 1,000 
     ' miles have a defined ClassBreakInfo category and yet all the Interstate roads will be returned (really 
     ' only the first 500 features are returned due to the ArcGIS Service configuration). Defining a default 
     ' SimpleLineSymbol will provide symbology for those features that have road lengths greater than 0 but 
     ' less than 50 miles long. If a ClassBreaksRenderer.DefaultSymbol was not defined these features would 
     ' not be drawn on the Map.
     Dim defaultSimpleLineSymbol As New ESRI.ArcGIS.Client.Symbols.SimpleLineSymbol
     Dim defaultBrush As New System.Windows.Media.SolidColorBrush(Color.FromArgb(255, 255, 255, 0)) 'Yellow
     defaultSimpleLineSymbol.Color = defaultBrush
     defaultSimpleLineSymbol.Width = 5
     myClassBreaksRenderer.DefaultSymbol = defaultSimpleLineSymbol
  
     ' NOTE: By default if no .LineStyle is specified the is specified for a SimpleLineSymbol the
     ' ESRI.ArcGIS.Client.Symbols.SimpleLineSymbol.LineStyle.Solid is set.
  
     ' A ClassBreaksRenderer should have 2 or more ClassBreakInfo Classes (meaning classification or grouping)
     ' to delineate the different symbology and class break information. The next three sections of code
     ' define 3 different ClassBreakInfo Classes (or groups) and their associated symbology.
  
     ' Group #1
     ' ========
     ' Create a ClassBreakInfo object as a container of information for each group. 
     Dim myClassBreakInfo1 As New ESRI.ArcGIS.Client.ClassBreakInfo
  
     ' Define the minimum and maximum values for the numeric grouping of the Field defined as the
     ' ClassBreaksRenderer.Field.
     myClassBreakInfo1.MinimumValue = 50
     myClassBreakInfo1.MaximumValue = 100
     
     ' Add an informational description and label for the group.
     myClassBreakInfo1.Description = "50 to 100 miles long"
     myClassBreakInfo1.Label = "A cyan solid line, width 3"
     
     ' Each ClassBreakInfo grouping needs a symbol to display
     Dim mySimpleLineSymbol1 As New ESRI.ArcGIS.Client.Symbols.SimpleLineSymbol
     Dim myBrush1 As New System.Windows.Media.SolidColorBrush(Color.FromArgb(255, 0, 255, 255)) 'Cyan
     mySimpleLineSymbol1.Color = myBrush1
     mySimpleLineSymbol1.Width = 3
     myClassBreakInfo1.Symbol = mySimpleLineSymbol1
  
     ' Add the ClassBreaksInfo information to the Classes (grouping) of the ClassBreaksRenderer
     myClassBreaksRenderer.Classes.Add(myClassBreakInfo1)
  
     ' Group #2
     ' ========
     ' Create a ClassBreakInfo object as a container of information for each group. 
     Dim myClassBreakInfo2 As New ESRI.ArcGIS.Client.ClassBreakInfo
  
     ' Define the minimum and maximum values for the numeric grouping of the Field defined as the
     ' ClassBreaksRenderer.Field.
     myClassBreakInfo2.MinimumValue = 100
     myClassBreakInfo2.MaximumValue = 200
     
     ' Add an informational description and label for the group.
     myClassBreakInfo2.Description = "100 to 200 miles long"
     myClassBreakInfo2.Label = "An olive dash line, width 1"
  
     ' Each ClassBreakInfo grouping needs a symbol to display. In this case the SimpleLineSymbol LineStyle
     ' was specified to be a Dash (rather than the default Solid).
     Dim mySimpleLineSymbol2 As New ESRI.ArcGIS.Client.Symbols.SimpleLineSymbol
     Dim myBrush2 As New System.Windows.Media.SolidColorBrush(Color.FromArgb(255, 107, 142, 35)) ' Olive
     mySimpleLineSymbol2.Color = myBrush2
     mySimpleLineSymbol2.Width = 1
     mySimpleLineSymbol2.Style = ESRI.ArcGIS.Client.Symbols.SimpleLineSymbol.LineStyle.Dash
     myClassBreakInfo2.Symbol = mySimpleLineSymbol2
  
     ' Add the ClassBreaksInfo information to the Classes (grouping) of the ClassBreaksRenderer
     myClassBreaksRenderer.Classes.Add(myClassBreakInfo2)
  
     ' Group #3
     ' ========
     ' Create a ClassBreakInfo object as a container of information for each group. 
     Dim myClassBreakInfo3 As New ESRI.ArcGIS.Client.ClassBreakInfo
  
     ' Define the minimum and maximum values for the numeric grouping of the Field defined as the
     ' ClassBreaksRenderer.Field.
     myClassBreakInfo3.MinimumValue = 200
     myClassBreakInfo3.MaximumValue = 1000
     
     ' Add an informational description and label for the group.
     myClassBreakInfo3.Description = "200 to 1000 miles long"
     myClassBreakInfo3.Label = "A black dot line, width 2"
  
     ' Each ClassBreakInfo grouping needs a symbol to display. In this case the SimpleLineSymbol LineStyle
     ' was specified to be a Dot (rather than the default Solid).
     Dim mySimpleLineSymbol3 As New ESRI.ArcGIS.Client.Symbols.SimpleLineSymbol
     Dim myBrush3 As New System.Windows.Media.SolidColorBrush(Color.FromArgb(255, 0, 0, 0)) 'Black
     mySimpleLineSymbol3.Color = myBrush3
     mySimpleLineSymbol3.Width = 2
     mySimpleLineSymbol3.Style = ESRI.ArcGIS.Client.Symbols.SimpleLineSymbol.LineStyle.Dot
     myClassBreakInfo3.Symbol = mySimpleLineSymbol3
  
     ' Add the ClassBreaksInfo information to the Classes (grouping) of the ClassBreaksRenderer
     myClassBreaksRenderer.Classes.Add(myClassBreakInfo3)
  
     ' Now that all of the ClassBreakInfo information has been added to the ClassBreaksRenderer object, 
     ' associate the ClassBreaksRenderer with the FeatuerLayer.Renderer Property.
     myFeatureLayer2.Renderer = myClassBreaksRenderer
  
     ' Add the myFeatureLayer2 to the Map2 Layer Collection. 
     Map2.Layers.Add(myFeatureLayer2)
  
     ' Zoom to the continental United States.
     Dim myEnvelope2 As New ESRI.ArcGIS.Client.Geometry.Envelope
     myEnvelope2.XMin = -130
     myEnvelope2.YMin = 10
     myEnvelope2.XMax = -70
     myEnvelope2.YMax = 60
     Map2.Extent = myEnvelope2
  
   End Sub
  
   Public Sub FillClassBreaksRenderer(ByVal myMap1 As ESRI.ArcGIS.Client.Map, ByVal myMap2 As ESRI.ArcGIS.Client.Map)
  
     ' This example shows how to draw Fills (aka. Polygons) on a FeatureLayer using the ClassBreaksRenderer 
     ' Class. This example takes two Map controls as arguments to compare the effect of applying a 
     ' ClassBreaksRenderer. Map1 will show a basic FeatureLayer that comes by default from ArcGIS Server. 
     ' Map2 will show the same FeatureLayer but with a specific ClassBreaksRenderer applied, to 
     ' compare the differences.
  
     ' ---------------------------------------------------------------------------------------------------------------------
  
     ' Clear the Layers in the Map's for runs of the function. 
     myMap1.Layers.Clear()
     myMap2.Layers.Clear()
  
     ' ---------------------------------------------------------------------------------------------------------------------
  
     ' Display the default FeatureLayer in myMap1
     ' ==========================================
  
     ' Add an ArcGISTiledMapsServiceLayer as a background to the map. Note: The first Layer added to the Map's 
     ' Layers Collection is on the bottom and the other Layer is added on the top.
     Dim myArcGISTiledMapServiceLayer1 As New ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer
     myArcGISTiledMapServiceLayer1.Url = "http://services.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer"
     myMap1.Layers.Add(myArcGISTiledMapServiceLayer1)
  
  
     ' Add a FeatureLayer to the map. Note: This Layer is drawn on top of the background layer.
     Dim myFeatureLayer1 As New ESRI.ArcGIS.Client.FeatureLayer
  
     ' This FeatureLayer contains US states as Fills (aka. Polygons).
     myFeatureLayer1.Url = "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StatesCitiesRivers_USA/MapServer/2"
  
     ' The Where clause is optional. It is necessary when more that 500/1000 records returned. In ArcGIS Server 
     ' 9.3.1 and prior, the default maximum is 500 records returned per FeatureLayer. In ArcGIS Server 10 the 
     ' default is 1000. This setting is configurable per map service using ArcCatalog or ArcGIS Server Manager 
     ' (on the Parameters tab). 
     myFeatureLayer1.Where = "1=1" ' Tip: The syntax "1=1" returns all records!
  
     ' Add the myFeatureLayer1 to the Map1 Layer Collection. 
     myMap1.Layers.Add(myFeatureLayer1)
  
     ' Zoom to the continental United States.
     Dim myEnvelope1 As New ESRI.ArcGIS.Client.Geometry.Envelope
     myEnvelope1.XMin = -130
     myEnvelope1.YMin = 10
     myEnvelope1.XMax = -70
     myEnvelope1.YMax = 60
     myMap1.Extent = myEnvelope1
  
     ' -----------------------------------------------------------------------------------------------------------------------
  
     ' Display the FeatureLayer in myMap2 that has a ClassBreaksRenderer applied
     ' =========================================================================
  
     ' Add an ArcGISTiledMapsServiceLayer as a background to the map. Note: The first Layer added to the Map's 
     ' Layers Collection is on the bottom and the other Layer is added on the top.
     Dim myArcGISTiledMapServiceLayer2 As New ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer
     myArcGISTiledMapServiceLayer2.Url = "http://services.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer"
     myMap2.Layers.Add(myArcGISTiledMapServiceLayer2)
  
  
     ' Add a FeatureLayer to the map. Note: This Layer is drawn on top of the background layer.
     Dim myFeatureLayer2 As New ESRI.ArcGIS.Client.FeatureLayer
  
     ' This FeatureLayer contains US states as Fills (aka. Polygons).
     myFeatureLayer2.Url = "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StatesCitiesRivers_USA/MapServer/2"
  
     ' The Where clause is optional. It is necessary when more that 500/1000 records returned. In ArcGIS Server 
     ' 9.3.1 and prior, the default maximum is 500 records returned per FeatureLayer. In ArcGIS Server 10 the 
     ' default is 1000. This setting is configurable per map service using ArcCatalog or ArcGIS Server Manager 
     ' (on the Parameters tab). 
     myFeatureLayer2.Where = "1=1" ' Tip: The syntax "1=1" returns all records!
  
     ' Specify the Outfields Property to specify which Fields are returned on which the 
     ' ClassBreaksRenderer.Field can use. Specifying the wildcard (*) character in the Add Property will 
     ' return all Fields. 
     myFeatureLayer2.OutFields.Add("*")
  
     ' Create the ClassBreakRenderer.
     Dim myClassBreaksRenderer As New ESRI.ArcGIS.Client.ClassBreaksRenderer
  
     ' Specify which Field (via its string name) the ClassBreaksRenderer will use for breaking the rendering
     ' of the Symbols into groups. Note: The Field that is specified for the Field Property MUST be a
     ' numeric (Double, Integer, SmallInteger, or Single) Field.FieldType. To Render groups of Strings use
     ' the UniqueValueRenderer instead.
     myClassBreaksRenderer.Field = "POP1990" ' Requires a numeric Field
  
  
     ' Define a default SimpleFillSymbol for a 'catch all' to draw the features for which no ClassBreaksInfo
     ' has been defined. In this example, only states with a population (POP1990) from 1,000,000 to 100,000,000 
     ' persons have a defined ClassBreakInfo category and yet all states will be returned. Defining a default 
     ' SimpleFillSymbol will provide symbology for those features that are greater than 0 but less than 
     ' 1,000,000. If a ClassBreaksRenderer.DefaultSymbol was not defined these features would not be drawn on 
     ' the Map.
     Dim defaultSimpleFillSymbol As New ESRI.ArcGIS.Client.Symbols.SimpleFillSymbol
     Dim defaultBrush As New System.Windows.Media.SolidColorBrush(Color.FromArgb(255, 255, 255, 0)) 'Yellow
     defaultSimpleFillSymbol.Fill = defaultBrush
     myClassBreaksRenderer.DefaultSymbol = defaultSimpleFillSymbol
  
  
     ' A ClassBreaksRenderer should have 2 or more ClassBreakInfo Classes (meaning classification or grouping)
     ' to delineate the different symbology and class break information. The next three sections of code
     ' define 3 different ClassBreakInfo Classes (or groups) and their associated symbology.
  
     ' Group #1
     ' ========
     ' Create a ClassBreakInfo object as a container of information for each group. 
     Dim myClassBreakInfo1 As New ESRI.ArcGIS.Client.ClassBreakInfo
  
     ' Define the minimum and maximum values for the numeric grouping of the Field defined as the
     ' ClassBreaksRenderer.Field.
     myClassBreakInfo1.MinimumValue = 1000000
     myClassBreakInfo1.MaximumValue = 3000000
     
     ' Add an informational description and label for the group.
     myClassBreakInfo1.Description = "1M to 3M people"
     myClassBreakInfo1.Label = "A cyan solid fill"
  
     ' Each ClassBreakInfo grouping needs a symbol to display
     Dim mySimpleFillSymbol1 As New ESRI.ArcGIS.Client.Symbols.SimpleFillSymbol
     Dim myBrush1 As New System.Windows.Media.SolidColorBrush(Color.FromArgb(255, 0, 255, 255)) 'Cyan
     mySimpleFillSymbol1.Fill = myBrush1
     myClassBreakInfo1.Symbol = mySimpleFillSymbol1
  
     ' Add the ClassBreaksInfo information to the Classes (grouping) of the ClassBreaksRenderer
     myClassBreaksRenderer.Classes.Add(myClassBreakInfo1)
  
     ' Group #2
     ' ========
     ' Create a ClassBreakInfo object as a container of information for each group. 
     Dim myClassBreakInfo2 As New ESRI.ArcGIS.Client.ClassBreakInfo
  
     ' Define the minimum and maximum values for the numeric grouping of the Field defined as the
     ' ClassBreaksRenderer.Field.
     myClassBreakInfo2.MinimumValue = 3000000
     myClassBreakInfo2.MaximumValue = 10000000
     
     ' Add an informational description and label for the group.
     myClassBreakInfo2.Description = "3M to 10M people"
     myClassBreakInfo2.Label = "An olive solid fill"
     
     ' Each ClassBreakInfo grouping needs a symbol to display. 
     Dim mySimpleFillSymbol2 As New ESRI.ArcGIS.Client.Symbols.SimpleFillSymbol
     Dim myBrush2 As New System.Windows.Media.SolidColorBrush(Color.FromArgb(255, 107, 142, 35)) ' Olive
     mySimpleFillSymbol2.Fill = myBrush2
     myClassBreakInfo2.Symbol = mySimpleFillSymbol2
  
     ' Add the ClassBreaksInfo information to the Classes (grouping) of the ClassBreaksRenderer
     myClassBreaksRenderer.Classes.Add(myClassBreakInfo2)
  
     ' Group #3
     ' ========
     ' Create a ClassBreakInfo object as a container of information for each group. 
     Dim myClassBreakInfo3 As New ESRI.ArcGIS.Client.ClassBreakInfo
  
     ' Define the minimum and maximum values for the numeric grouping of the Field defined as the
     ' ClassBreaksRenderer.Field.
     myClassBreakInfo3.MinimumValue = 10000000
     myClassBreakInfo3.MaximumValue = 100000000
     
     ' Add an informational description and label for the group.
     myClassBreakInfo3.Description = "10M to 100M people"
     myClassBreakInfo3.Label = "A black solid fill"
  
     ' Each ClassBreakInfo grouping needs a symbol to display. 
     Dim mySimpleFillSymbol3 As New ESRI.ArcGIS.Client.Symbols.SimpleFillSymbol
     Dim myBrush3 As New System.Windows.Media.SolidColorBrush(Color.FromArgb(255, 0, 0, 0)) 'BLACK
     mySimpleFillSymbol3.Fill = myBrush3
     myClassBreakInfo3.Symbol = mySimpleFillSymbol3
  
     ' Add the ClassBreaksInfo information to the Classes (grouping) of the ClassBreaksRenderer
     myClassBreaksRenderer.Classes.Add(myClassBreakInfo3)
  
     ' Now that all of the ClassBreakInfo information has been added to the ClassBreaksRenderer object, 
     ' associate the ClassBreaksRenderer with the FeatuerLayer.Renderer Property.
     myFeatureLayer2.Renderer = myClassBreaksRenderer
  
     ' Add the myFeatureLayer2 to the Map2 Layer Collection. 
     Map2.Layers.Add(myFeatureLayer2)
  
     ' Zoom to the continental United States.
     Dim myEnvelope2 As New ESRI.ArcGIS.Client.Geometry.Envelope
     myEnvelope2.XMin = -130
     myEnvelope2.YMin = 10
     myEnvelope2.XMax = -70
     myEnvelope2.YMax = 60
     Map2.Extent = myEnvelope2
  
   End Sub

Remarks

The following image depicts how a Map would look that corresponds to XAML code with a ClassBreaksRenderer defined for a FeatureLayer.

Example of how XAML code using a ClassBreaksRenderer on a FeatureLayer would look visually in the Map.

A ClassBreaksRenderer should have 2 or more ClassBreakInfo objects defined by the Classes Property (meaning classification or grouping) to delineate the different symbology and class break information. Otherwise, use a SimpleRenderer if just one type of symbology needs to be rendered.

The name of the Field that is specified for the Field Property must be a numeric (Double, Integer, SmallInteger, or Single) Field.FieldType. To render groups of Strings use the UniqueValueRenderer instead.

Defining a DefaultSymbol provides a 'catch all' to draw the features for which no ClassBreakInfo's have been defined. If a DefaultSymbol is not defined, the Layer features will not be drawn on the Map when there is no grouping defined by the ClassBreakInfo's. For example: assume that a Layer has numerical observations that range from 1 to 90. If three ClassBreakInfo objects were defined that covered the grouped ranges of: (#1) 10 to 30, (#2) 30 to 60, and (#3) 60 to 90, unless a DefaultSymbol is defined there will be no visual representations visible on the map for the numerical range of 1 to 9.

Inheritance Hierarchy

System.Object
   System.Windows.Threading.DispatcherObject
      System.Windows.DependencyObject
         ESRI.ArcGIS.Client.ClassBreaksRenderer

Requirements

Target Platforms: Windows XP Professional, Windows Server 2003 family, Windows Vista, Windows Server 2008 family

See Also

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