How to code NAME textbox that accepts only letters & blankspaces. Same for NUMBER textbox:
private void tbOwnerName_TextChanged(object sender, EventArgs e) { /*if (!char.IsControl(e.KeyChar) && !char.IsLetter(e.KeyChar)) { e.Handled = true; base.OnKeyPress(e); MessageBox.Show("Please enter Characters only"); }*/ } The proper way to do that is using regular expressions , in C# you can use REGEX class to check if an string matches a patterns that declared by regular expression.
Regex regex = new Regex(@"^[a-zA-Z0-9_ ]*$"); Match match = regex.Match("Dot 55 Perls"); if (match.Success) { //do something } this answer might help you to find the proper regular expression for your situation.
