How Can I Restrict TextBox Input to Numbers Only?

Text box digital input limit

In a form -based application, forced text box controls only are essential to maintain data integrity. Although the KeyPress event can deal with this problem, there are more comprehensive solutions.

Plan 1: Use Numericupdown control

Numericupdown control provides built -in digital verification functions. It allows users to use keyboard arrows to increase and impair, which is convenient for digital input.

Plan 2: Treatment based on incident

For more common methods, consider handling keyboard events:

This code filter out non -digital characters and limit the number of decimal points. Adjust the logic according to your specific needs (for example, allow negative values ​​or use

to limit digital digits).

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