Hi stacey,

Based on my understanding, you want to intercept the double click event in
datagrid's cell.

Yes, I can reproduce out this problem. The problem is that the first click
of a double click may be caught by the datagrid (and used to activate the
cell) while the second click goes to the TextBox for the columnstyle
object. This means the TextBox thinks this is a singleclick, and does not
fire its doubleclick event.

There is a sample shows how to workaround this issue, please refer to:
"5.46 How do I catch a doubleclick in my datagrid?"
http://www.syncfusion.com/FAQ/WinForms/FAQ_c44c.asp#q869q
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Thank you for your patience and cooperation. If you have any questions or
concerns, please feel free to post it in the group. I am standing by to be
of assistance.

Best regards,
Jeffrey Tan
Microsoft Online Partner Support