GoSilverlight V1.224
In Diagram
SelectionChanged event multiple occur when I select multiple node
using mouse drag range area section.
I want to occur SelectionChanged event only once.
How to solve it.
Instead of defining a Diagram.SelectionChanged event handler, I suggest you replace the Diagram.DragSelectingTool with one that overrides the SelectInRect method.
public class CustomSelectingTool : DragSelectingTool {
public override void SelectInRect(Rect r) {
base.SelectInRect(r);
. . . do what you want . . .
}
}
And install this tool via:
myDiagram.DragSelectingTool = new CustomSelectingTool();
or the same thing in XAML.