preventing non-ints in a string

How do you do this in C#? I'm used to making an edit-box in VC, and forcing it to only accept int values. Can't seem to find the way to do this in C#.

Thanks,
sternaphile

Write a handler for KeyDown/KeyPress (not sure which, but one will work) in the text box. Check the value of the key. If not a number, stop processing i.e. .Handled()

Bill F

Sure, that would work, but how about something along the lines of isdigit()?

As in using isdigit() to check the key? The KeyPress handler will return the key pressed. I'm sure there is a static function Keys.IsDigit() or some sort that could do that.

Bill F

In your validation code(KeyPress or KeyDown), do the following:

Code:

---

private void textBox1_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)
{
  if ((Char.IsDigit(e.KeyChar) == false) && (Char.IsControl(e.KeyChar) == false))
  {
    e.Handled = true;
  }
}

---

That chesk for digits(0-9) and control keys(arrows, delete, etc). Hope that helps!