GridViewMaskBoxColumn format problem

Hello George,

Thank you for writing.

I suppose that the GridViewMaskBoxColumn.TextMaskFormat property is set to MaskFormat.ExcludePromptAndLiterals on our end. When it is set to IncludePromptAndLiterals the result is as expected. Please refer to the attached screenshot illustrating the behavior on my end. I have also attached my sample project for your convenience.

I hope this information helps. Should you have further questions, I would be glad to help.
Regards,
Dess
Telerik