Set DiagramView.Behavior = DrawLinks and the user will be able to draw links between existing nodes but not to create new nodes.

I hope that helps,
Stoyan

Hi,I am trying to draw a canvas on the diagram area.I wrote :-
diagram .Behavior = Behavior.Custom;
diagram .CustomNodeType = typeof(Canvas);

when a toolbox item canvas is clicked.It allows me to draw a canvas,bt when nt selected the canvas is nt visible n furthur if i try to add another UIElement like button by same method as above:-
diagram .CustomNodeType = typeof(Button);

the canvas doesn't allow the button to b created in it,i.e. i can't add the button as a child of the canvas.
If i drag n drop the button over the canvas it adds the button as a child:-

void thisCanvas_Drop(object sender, DragEventArgs e)
       {
           Canvas currentCanvas = sender as Canvas;
           Button btn = new Button();
           btn.Height = 20;
           btn.Width = 100;
           btn.Content = "Button1";
           currentNodeCreated = btn as UIElement;
           currentCanvas.Children.Add(currentNodeCreated);
       }


bt it does not allow the child button to modify,i.e text/height/widht can't b changed.
can u help me out?
Thanks n Regards
Kavita.