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Editorial Team
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Asked: 2026-05-13T19:14:38+00:00

I have implement the ValueChanged event, but I found it will be triggered only

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I have implement the ValueChanged event, but I found it will be triggered only after change the focus from numericUpDown to other control or by clicking the up/down arrow.

Inputting the value in the control will not trigger ValueChanged event.

What I did now is adding an KeyDown event and judge if the input value is numeric (can not include SHIFT/CTRL/ALT key); but there is another case need to be involved: the user can paste value into the numericUpDown ctrl

What I need is :

  1. When I was typing numeric value (only numeric) in the numericUpDown ctrl, it will known the content has been changed;
  2. When pasted a numeric value into the ctrl, it also kowns the content changed
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1 Answer

  1. Editorial Team

    I answered your related other question about numeric updown control:

    how to hold the invalid value for NumericUpDown after it loses focus?

    You can use the same technique I described there to handle the TextChanged event of the embedded textbox.

    Best regards…

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