Hi David,
You can execute your procedure by using our MVVM-friendly implementation of the Commands collection of the RadDataGrid. We have a detailed explanation of how to add a custom implementation of the CellTap in our online documentation. You can check out it here: DataGrid: CellTap Command.
I've updated the status of this item to "Declined" as it it not related to a bug report or feature request.
If you have any further questions, please let us know.
Regards, Deyan Progress Telerik
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