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Undo in TextBox


If a user enters a wrong value (which depends on some properties of it's
container control) in one of my dynamicly made TextBoxes I want to undo the
change he made to the Text property of the TextBox.
I think some possible ways are:
- Use a Validation control. This will be difficult because I generate
multiple TextBoxes dynamicly and they have different validationrules.
- Do something in the TextChanged handler. This is preferred and simple
but maybe this is impossible.
- Add a property to the TextBox control which remembers the previously
entered value.
- .....

My first question is: how can I do the undo the best way?
My second question is: is there a possibility to retrieve the previous
entered value in the TextChanged handler?

Thanks, Marco
Nov 17 '05 #1
0 1581

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