DataGridView: Apply an edit to all selected rows?

You can use CurrentCellDirtyStateChanged for when Checkbox value changed. But when this event triggered, the selectedrows will be gone. All you should do, is saving selectedrows before it.

This is not a nice design, but you can try to use the MouseDown event (which will trigger before the grid change the selection) and HitTest (to know where the user is clicking).

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