TextBox Validation

Question

Hi all i would like to validate a text box so that it should allow only numbers from 0-9 and A-Z(In capitals). Can any one tell how to do this

PJ Martins · Answer

That code is for a windows forms application - System.Windows.Forms.TextBox

Dorababu Meka · Answer

I need it using windows appplication

PJ Martins · Answer

you can use regular expressions to validate the character in the KeyPress event as follows: private void textBox1_KeyPress( object sender KeyPressEventArgs e) { if (!System.Text.RegularExpressions. Regex .Match(e.KeyChar.ToString() [A-Z|0-9] ).Success) e.Handled = true ; }