If you need to assign consecutive ordinal numbers to nodes, you could use diagram.Tag as a counter - set it to 0 once a new diagram is created, and for each new node increment the counter and assign its value to the node.

I hope that helps,
Stoyan

Try assigning the result from this method to each new node:

int IncrementCounter()
{
	int counterValue = 0;
	if (diagram.Tag != null)
		counterValue = (int)diagram.Tag;
	diagram.Tag = ++counterValue;
	return counterValue;
} 

I hope that helps,
Stoyan

This work perfect, but nwo i cant fidn the way to make work when  copy nod eand then and paste.

I know copy paste is suposed be a exact copy, but i need paste node be enumerated correctly.

Some idea for do this?

This is what im doing now:

    int IncrementCounter()
       {
           int counterValue = 0;
           if (form.Tag != null)
               counterValue = (int)form.Tag;
           form.Tag = ++counterValue;
           return counterValue;

       }


private void form_NodeCreated(object sender, MindFusion.Diagramming.Wpf.NodeEventArgs e)
       {


     

           if (form.DefaultControlType == typeof(MyButton))
           {
               MyButton Mbutton = (MyButton)e.Node.UIElement;

               Mbutton.Text = "Button " + IncrementCounter();                                  
           }
    

  private void form_NodePaste(object sender, MindFusion.Diagramming.Wpf.NodeEventArgs e)
       {
         //not understand what is the code : (
       }

Sotyo, i already try that and not work.

Yes, check this:


<d:Diagram x:Name="form"

SelectAfterCreate="False"

AdapterHandlesStyle="HatchHandles"

GridSizeX="1"

GridSizeY="1"

NodeCreated="form_NodeCreated"

NodePasted="form_NodePaste"

NodeDeleted="form_NodeDeleted"

InitializeNode="form_InitializeNode"

NodeSelecting="form_NodeSelecting"







/>



int IncrementCounter()

{


int counterValue = 0;


if (form.Tag != null)


counterValue = (int)form.Tag;


form.Tag = ++counterValue;


return counterValue;

}




private void form_NodeCreated(object sender, MindFusion.Diagramming.Wpf.NodeEventArgs e)

{



if (e.Node.UIElement is MyButton)


{


MyButton Mbutton = (MyButton)e.Node.UIElement;


Mbutton.Text = "B " + IncrementCounter();








}


}






private void form_NodePaste(object sender, MindFusion.Diagramming.Wpf.NodeEventArgs e)

{


if (e.Node.UIElement is MyButton)


{


MyButton tbutton = (MyButton)e.Node.UIElement;


Mbutton.Text = "Button " + IncrementCounter();


}


}

Some idea why this not work?

Best regards.