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How to Prevent Shapes from Being Connected to Themselves

Updated on Sep 15, 2025

Environment

Product Version	2018.2.515
Product	RadDiagram for WPF

Description

How to prevent a RadDiagramShape to connect to itself when you single click on one of its connector points.

Solution

To prevent this use one of the following two solutions:

Solution #1

Set the ReflexiveRouter of RadDiagram to null.

	this.diagram.RoutingService.ReflexiveRouter = null;

Solution #2

Handle the ConnectionManipulationCompleted event of RadDiagram, if the connection source is the same as the Shape of the event arguments.

	private void RadDiagram_ConnectionManipulationCompleted(object sender, Telerik.Windows.Controls.Diagrams.ManipulationRoutedEventArgs e)
	{
		if (e.Connection.Source == e.Shape)
		{           
			e.Handled = true;
		}
	}