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Editorial Team
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Asked: 2026-06-06T14:46:00+00:00

Ive just stumbled across property on a text box and it sounds the ideal

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Ive just stumbled across property on a text box and it sounds the ideal solution for my validation routine, however I have no idea how to take advantage of it.

How can I use said property to revert the changes if the validation fails?

I have searched Google to no avail.

Thanks

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1 Answer

  1. Editorial Team

    The UndoAction can only be used as a piece of information on how the undo stack is changed. To change the stack, use the Undo and Redo methods of the textbox.

    However, you should use the Validating event for validation. E.g. in combination with an ErrorProvider. An example is provided on the MSDN page.

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