preventing non-ints in a string

[sternaphile]

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

[bfarley]

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

[sternaphile]

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

[bfarley]

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

[CPCericola]

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

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!