'System.InvalidOperationException' occurred in Telerik.Windows.Controls.Diagrams.dll, The shape has no connectors defined.

[Robbie]

I have a RadDiagramTextShape without connectors.  I don't want to connect to text shapes.

So I clear then using this line of code:

    ((RadDiagramTextShape)Shape).Connectors.Clear();

My problem is when a user changes to the Connector Tool ( diagram.ActiveTool = MouseTool.ConnectorTool) and clicks within the RadDiagramTextShape  an unhandled exception is thrown:

An unhandled exception of type 'System.InvalidOperationException' occurred in Telerik.Windows.Controls.Diagrams.dllAdditional information: The shape has no connectors defined.

Is there a way to prevent this? 

[Petar Mladenov]

Hi Robbie,

When the ActiveTool is the Connector Tool and you click on a shape, the RadDiagram tries to create a connection starting from the nearest connector of the shape. However, in your case this shape does not have a connectors and the diagram deliberately throws an exception - "The Shape has no Connectors".

 If this does not fit in your scenario а possible way to go is to create custom ConnectionTool. You can find a sample implementation in the attached solution. Furthermore, you can explore these help resources:

Telerik XAML GitHub Repository: Diagram Custom Tools Demo
RadDiagram Tools Customization

Regards,
Petar Mladenov
Telerik