Compare ASCII of Input values to check whether it is Character or Numeric

Question

I need to check whether user entered a character or numeric digit in DataGridViewTextBoxCell. How to perform this comparison on the basis of ASCII values of entered key in KeyPress Event of DataGridView. Any Suggestion ?

Answer 1

There is static functions in the char type:

var isAlpha = char.IsLetter('a');


var isDigit = char.IsNumber('1');

The actual char presses is in the KeyChar property of KeyPressEventArgs.

Answer 2

Take a look at the methods available in the char structure http://msdn.microsoft.com/en-us/library/system.char.aspx

another option would be to build a custom control that inherits from DataGridViewTextBoxCell if you need to do this in more than one place.