Keypress event handler

Am currently trying to create code that clears a text box after a message box is shown when a nonnumeric digit is entered. The code am using doesnt clear the text field as shown below:

Code:

if(Char.IsDigit(e.KeyChar) == false)
			{
				txtStudID.Focus();
				txtStudID.Text = "";
               MessageBox.Show("Please enter a numeric value to continue");
               
				
			}	

Thanks for any help

 

Oh! A simple fix on line 7 would fix that, change line 7 to this

Code:

if (document.layers || e.which) { pressedKey = e.which; }