Adding a Polygon

You can connect geographic coordinates with a polygon by adding a C1VectorPolygon to the C1VectorLayer (see Vector Layer for more information). In this topic, you will create a 3-point polygon using XAML and code.

In XAML

Complete the following steps:

Place the following XAML markup between the <c1:C1Maps> and </c1:C1Maps> tags:

XAML	Copy Code
<c1:C1VectorLayer Margin="2,0,-2,0"> <c1:C1VectorPolygon Points="-80.15,42.12 -123.08,39.09, -3.90,30.85" StrokeThickness="3" Stroke="Red"> </c1:C1VectorPolygon> </c1:C1VectorLayer>

Press F5 to run the project.

In Code

Complete the following steps:

In XAML view, add x:Name="C1Maps1" to the <c1:C1Maps> tag so that the object will have a unique identifier for you to call in code.

Enter Code view and import the following namespace:

Visual Basic	Copy Code
Imports C1.Silverlight.C1Maps

C#	Copy Code
using C1.Silverlight.C1Maps;

Add the following code beneath the InitializeComponent() method:

Visual Basic	Copy Code
' Create layer and add it to the map Dim C1VectorLayer1 As New C1VectorLayer() C1Maps1.Layers.Add(C1VectorLayer1) ' Initial track Dim pts As Point() = New Point() {New Point(-80.15, 42.12), New Point(-123.08, 39.09), New Point(-3.9, 30.85)} ' Create collection and fill it Dim pcoll As New PointCollection() For Each pt As Point In pts pcoll.Add(pt) Next ' Create a polygon and add it to the vector layer as a child Dim C1VectorPolygon1 As New C1VectorPolygon() C1VectorLayer1.Children.Add(C1VectorPolygon1) ' Points C1VectorPolygon1.Points = pcoll ' Appearance C1VectorPolygon1.Stroke = New SolidColorBrush(Colors.Red) C1VectorPolygon1.StrokeThickness = 3

Visual Basic

Copy Code

' Create layer and add it to the map

Dim C1VectorLayer1 As New C1VectorLayer()
C1Maps1.Layers.Add(C1VectorLayer1)

' Initial track

Dim pts As Point() = New Point() {New Point(-80.15, 42.12), New Point(-123.08, 39.09), New Point(-3.9, 30.85)}

' Create collection and fill it

Dim pcoll As New PointCollection()

For Each pt As Point In pts
   pcoll.Add(pt)
Next

' Create a polygon and add it to the vector layer as a child

Dim C1VectorPolygon1 As New C1VectorPolygon()
C1VectorLayer1.Children.Add(C1VectorPolygon1)

' Points

C1VectorPolygon1.Points = pcoll

' Appearance

C1VectorPolygon1.Stroke = New SolidColorBrush(Colors.Red)
C1VectorPolygon1.StrokeThickness = 3

C#	Copy Code
// Create layer and add it to the map C1VectorLayer C1VectorLayer1 = new C1VectorLayer(); C1Maps1.Layers.Add(C1VectorLayer1); // Initial track Point[] pts = new Point[] { new Point(-80.15,42.12), new Point(-123.08,39.09), new Point(-3.90,30.85)}; // Create collection and fill it PointCollection pcoll = new PointCollection(); foreach( Point pt in pts) pcoll.Add(pt); // Create a polygon and add it to the vector layer as a child C1VectorPolygon C1VectorPolygon1 = new C1VectorPolygon(); v1.Children.Add(C1VectorPolygon1); // Points C1VectorPolygon1.Points = pcoll; // Appearance C1VectorPolygon1.Stroke = new SolidColorBrush(Colors.Red); C1VectorPolygon1.StrokeThickness = 3;

Copy Code

// Create layer and add it to the map
C1VectorLayer C1VectorLayer1 = new C1VectorLayer();
C1Maps1.Layers.Add(C1VectorLayer1);

// Initial track
Point[] pts = new Point[] { new Point(-80.15,42.12), new Point(-123.08,39.09),
new Point(-3.90,30.85)};
    
// Create collection and fill it
PointCollection pcoll = new PointCollection();
foreach( Point pt in pts)
pcoll.Add(pt);
    
// Create a polygon and add it to the vector layer as a child
C1VectorPolygon C1VectorPolygon1 = new C1VectorPolygon();
v1.Children.Add(C1VectorPolygon1);

  // Points
   C1VectorPolygon1.Points = pcoll;

  // Appearance
  C1VectorPolygon1.Stroke = new SolidColorBrush(Colors.Red);
  C1VectorPolygon1.StrokeThickness = 3;

Press F5 to run the project.

This Topic Illustrates the Following:

The following image depicts a C1Maps control with three geographical coordinates connected by a polygon.