Closes the Polygon, ensuring that the last Point in the Polygon is at the same location as the first Point, by adding points if necessary.

Namespace: ESRI.ArcGISExplorer.Geometry
Assembly: ESRI.ArcGISExplorer (in ESRI.ArcGISExplorer.dll) Version: 2.0.0.900 (2.0.0.900)

Syntax

C#
public void Close()

Visual Basic (Declaration)
Public Sub Close

Remarks

For a Polygon to be a valid polygonal shape, it must describe a closed shape - the last Point must be at the same location as the first Point. The Close method will check and, if necessary, add a new Point at the same location as the first Point; existing points are not moved.

For a multipart Polygon, the Close method will close each ring separately.

This method does not guarantee a correctly constructed (simple) Polygon; if a Polygon has been constructed from individual points it is unclear if it has been constructed to be geometrically correct, refer to the Simplify(Polygon) method.

Examples

The code below demonstrates the creation of a simple Polygon using the AddPoint and Close methods. The individual points in the Polygon are also retrieved using the GetPoint method and this information is used to add a Note with popup information to the current map in the application.

CopyC#

// Create a new Polygon, allowing the default CoordinateSystem of WGS84.
Polygon poly = new Polygon();

// Add a series of points to the Polygon (overloads are available to add multiple Points.
poly.AddPoint(new ESRI.ArcGISExplorer.Geometry.Point(2.33434596343321, 48.8628885302916));
poly.AddPoint(new ESRI.ArcGISExplorer.Geometry.Point(2.33269733037166, 48.8603451299656));
poly.AddPoint(new ESRI.ArcGISExplorer.Geometry.Point(2.33659764618658, 48.8594678571346));
poly.AddPoint(new ESRI.ArcGISExplorer.Geometry.Point(2.33960511237599, 48.8591968205275));
poly.AddPoint(new ESRI.ArcGISExplorer.Geometry.Point(2.340578062027, 48.8608773611669));
// Ensure the Polygon is a closed shape.
poly.Close();

// Create a Note using the polygon shape.
Note louvre = new Note("The Louvre", poly, Symbol.Fill.SolidOutline.Green);

// Populate the Note popup information using information about the Polygon.
StringBuilder info = new StringBuilder(@"<p><a href=""http://www.louvre.fr"">The Louvre, Paris</a></p>");
for (int i = 0; i < poly.PointCount(); i++)
{
  ESRI.ArcGISExplorer.Geometry.Point pt = poly.GetPoint(i);
  info.AppendLine(@"<p>" + i.ToString() + ": " + pt.ToString() + @"</p>");
}

MapDisplay disp = ESRI.ArcGISExplorer.Application.Application.ActiveMapDisplay;
louvre.Popup.Content = info.ToString();

// Add the Note to the current Map.
disp.Map.ChildItems.Add(louvre);

CopyVB.NET

' Create a new Polygon, allowing the default CoordinateSystem of WGS84.
Dim poly As Polygon = New Polygon()

' Add a series of points to the Polygon (overloads are available to add multiple Points.
poly.AddPoint(New ESRI.ArcGISExplorer.Geometry.Point(2.33434596343321, 48.8628885302916))
poly.AddPoint(New ESRI.ArcGISExplorer.Geometry.Point(2.33269733037166, 48.8603451299656))
poly.AddPoint(New ESRI.ArcGISExplorer.Geometry.Point(2.33659764618658, 48.8594678571346))
poly.AddPoint(New ESRI.ArcGISExplorer.Geometry.Point(2.33960511237599, 48.8591968205275))
poly.AddPoint(New ESRI.ArcGISExplorer.Geometry.Point(2.340578062027, 48.8608773611669))
' Ensure the Polygon is a closed shape.
poly.Close()

' Create a Note using the polygon shape.
Dim louvre As Note = New Note("The Louvre", poly, Symbol.Fill.SolidOutline.Green)

' Populate the Note popup information using information about the Polygon.
Dim info As StringBuilder = New StringBuilder("<p><a href=""http://www.louvre.fr"">The Louvre, Paris</a></p>")
For i As Integer = 0 To poly.PointCount() - 1
  Dim pt As ESRI.ArcGISExplorer.Geometry.Point = poly.GetPoint(i)
  info.AppendLine("<p>" & i.ToString() & ": " & pt.ToString() & "</p>")
Next

Dim disp As MapDisplay = ESRI.ArcGISExplorer.Application.Application.ActiveMapDisplay
louvre.Popup.Content = info.ToString()

' Add the Note to the current Map.
disp.Map.ChildItems.Add(louvre)

Syntax

Remarks

Examples

See Also