C＃中的按键事件

Question

I want to code a key press event to a text box to accept only alphabets.. any help appreciated.

also, the different validations that I can apply to a normal textbox to not accept anything else than alphabets. even if copy pasted and not just key press//

thanks reggie

Answer 1

You need TextChanged event. You might also want to check MaskedTextBox control.

Answer 2

Use a maskedtextbox control. That will solve your problem.

http://msdn.microsoft.com/en-us/library/system.windows.forms.maskedtextbox.mask.aspx

Answer 3

hook up the event on the textbox:

private void txtBOX_KeyPress(object sender, KeyPressEventArgs e)
{

}

You can use textchange event, or a mask. keypress as mention above is the ugliest way to do it, but the most powerfull.. you can "play" with the input data as you wish.

Answer 4

use these code in your key press event

if(!char.IsLetter(e.keyChar) && e.keyChar!=8)
{
e.handeled=true;
}  

These will prevent your text box to accept any thing else alphabets and the backspace button.