Is there a way (perhaps via EventArgs) to signal the app when a user tries to enter out-of-range input into a WinForm control? (Specifically, a number in a NumericUpDown control numericUpDown1 that is larger than numericUpDown1. Maximum?) Yes, I know the control won't allow the input, but I want to display an error message if this happens.
2  1663  tlhintoq 3,525
Recognized Expert Specialist
There are none built in that I am aware of. What you could do is allow a greater range, do the validation yourself, raise a custom event, then set the value to the max you will allow.
Plater 7,872
Recognized Expert Expert
If you make your own control derived from the numericupdown, there are some private functions that look promising.
There's a "onTextChan ged" and "onTextboxTextC hanged" and "ValidateEditTe xt" that might be helpful.
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