Gets a full-size Bitmap of the raster dataset.
Namespace:
ESRI.ArcGISExplorer.DataAssembly: ESRI.ArcGISExplorer (in ESRI.ArcGISExplorer.dll) Version: 2.0.0.1500 (2.0.0.1500)
Syntax
Return Value
A Bitmap object representing the raster dataset.Remarks
Common sense is required when using this method given that raster datasets can be extremely
large (e.g satellite imagery, aerial photos). Using the method in these cases could result in
an OutOfMemoryException exception and application crash. A sensible use of the method would be to
get the Bitmap for a photo stored in a Raster column in a file geodatabase feature class.
Examples
The code below demonstrates the GetBitMap method. A file geodatabase feature class of mountains in Scotland
is searched to find any rows within 100 meters of the users clicked location. For each mountain, if a raster is present in the
Photo column, the GetBitmap method is used to display the image in a PopupWindow.
CopyC#
{ MapDisplay disp = ESRI.ArcGISExplorer.Application.Application.ActiveMapDisplay; Map map = disp.Map; //Get the FeatureLayer FeatureLayer mountains = map.FindByName("mountains") as FeatureLayer; //Get the Table Table mountainsTable = mountains.Table; //Get the user clicked location ESRI.ArcGISExplorer.Geometry.Point clickedPoint = disp.TrackPoint(); //Return the rows which are within 100 meters of the clicked location RowCollection foundMountains = mountainsTable.SearchByDistance(clickedPoint, 100, Unit.Linear.Meters); //Loop around found rows foreach (Row mountain in foundMountains) { //Get the Raster stored in the "Photo" Column Raster photoOfMtn = mountain.Values["Photo"] as Raster; if (photoOfMtn != null) { //Get the photo as a Bitmap System.Drawing.Bitmap photo = photoOfMtn.GetBitmap(); //Save the bitmap to a temporary location on disk //so that it can be loaded into a PopupWindow string pathToTempSavedPhoto = @"C:\temp\Mountain" + Guid.NewGuid().ToString() + ".png"; photo.Save(pathToTempSavedPhoto); photo.Dispose(); //Create a URI for the saved file Uri uri = new Uri(pathToTempSavedPhoto); //Show the image in a Popup Popup popup = new Popup(disp, uri.ToString(), mountain.Values["Name"].ToString()); popup.Activate(); } } }
CopyVB.NET
Dim disp As MapDisplay = ESRI.ArcGISExplorer.Application.Application.ActiveMapDisplay Dim myMap As Map = disp.Map 'Get the FeatureLayer Dim mountains As FeatureLayer = DirectCast(myMap.FindByName("mountains"), FeatureLayer) 'Get the Table Dim mountainsTable As Table = mountains.Table 'Get the user clicked location Dim clickedPoint As ESRI.ArcGISExplorer.Geometry.Point = disp.TrackPoint() 'Return the rows which are within 100 meters of the clicked location Dim foundMountains As RowCollection = mountainsTable.SearchByDistance(clickedPoint, 100, Unit.Linear.Meters) 'Loop around found rows For Each mountain As Row In foundMountains 'Get the Raster stored in the "Photo" Column Dim photoOfMtn As Raster = TryCast(mountain.Values.Item("Photo"), Raster) If Not photoOfMtn Is Nothing Then 'Get the photo as a Bitmap Dim photo As System.Drawing.Bitmap = photoOfMtn.GetBitmap() 'Save the bitmap to a temporary location on disk 'so that it can be loaded into a PopupWindow Dim pathToTempSavedPhoto As String = "C:\temp\Mountain" & Guid.NewGuid().ToString() & ".png" photo.Save(pathToTempSavedPhoto) photo.Dispose() 'Create a URI for the saved file Dim aUri As Uri = New Uri(pathToTempSavedPhoto) 'Show the image in a Popup Dim aPopup As Popup = New Popup(disp, aUri.ToString(), mountain.Values.Item("Name").ToString()) aPopup.Activate() End If Next