textbox validation

Question

i want a text box which allow only letters numbers hyphen and back space plz hlp

Hemant Srivastava · Answer

Add an event handler for KeyPress for the TextBox and use following code: private void txtBx_KeyPress(object sender KeyPressEventArgs e) { if (e.KeyChar == '\b' // Allowing Back Space ||Char.IsLetterOrDigit(e.KeyChar) // Allowing any letter OR Digit || e.KeyChar == '-') // Allowing Hyphen { e.Handled = false; } else { e.Handled = true; } }