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Excel Document VSTO: "Associated Diagram" in the RadDiagramRibbonBar
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This is a migrated thread and some comments may be shown as answers.
Eduardo
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Eduardo asked on 26 Jan 2018, 02:13 PM

While trying to build a quick POC using Telerik diagram control I came upon this issue.

When I try to bind "Associated Diagram" in the RadDiagramRibbonBar, I get an error when I click on the Drop down control.

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Microsoft Visual Studio
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Error using the dropdown: Unable to cast object of type 'System.Windows.Forms.UserControl' to type 'System.Windows.Forms.Form'.
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OK   
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I understand that an Excel Document Action Pane is in effect a UserControl type but I was wondering if there was a work around to this scenario.

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Eduardo
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answered on 26 Jan 2018, 02:21 PM
FYI, I guess even the Excel Document VSTO context is irrelevant. I just tried a simple UserControl project to host the Diagram toolbar and the Diagram controls and the error comes up the same when trying to connect the toolbar with the diagram control.
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Dimitar
Telerik team
answered on 29 Jan 2018, 07:58 AM
Hello Ramon,

I have logged this issue on our Feedback Portal. You can track its progress, subscribe to status changes and add your comment to it here. I have also updated your Telerik Points.

To workaround this set the AssociatedControl in the code:
radDiagramRibbonBar1.AssociatedDiagram = radDiagram1;

Should you have any other questions do not hesitate to ask.

Regards,
Dimitar
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