Can I delete vertex on a graphic layer

DanDong

Hi all,

    I was coding the functions by using C# and silverlight, I draw a polygon on a graphic layer. Then I want to have a function to delete some of the vertex on the polygon or delete the last point when I am drawing the polygon. Can I do this on a graphic layer? or I must do this on a feature layer? Can you give me some sample codes or suggestion on that? Thank you very much!

JenniferNery

If you are using Draw, you can read about these methods from here: http://help.arcgis.com/en/webapi/silverlight/apiref/ESRI.ArcGIS.Client~ESRI.ArcGIS.Client.Draw_methods.html

You can modify this sample to include the following code. Be sure to wire up to Map.MouseClick and Map.KeyDown events.http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#DrawGraphics

MapPoint addPoint;
void MyMap_MouseClick(object sender, ESRI.ArcGIS.Client.Map.MouseEventArgs e)
{
 addPoint = e.MapPoint;
}

void MyMap_KeyDown(object sender, KeyEventArgs e)
{
 if (e.Key == Key.Delete)
  MyDrawObject.UndoLastVertex();
 else if (e.Key == Key.Insert)
  MyDrawObject.AddVertex(addPoint);
 else if (e.Key == Key.Enter)
  MyDrawObject.CompleteDraw();
}