c# - How to block or restrict special characters from textbox

Question

I need exclude special characters (%,&,/,",' etc ) from textbox

Is it possible? Should I use key_press event?

string one = radTextBoxControl1.Text.Replace("/", "");
                string two = one.Replace("%", "");
                //more string
                radTextBoxControl1.Text = two;

in this mode is very very long =(

Answer 1

I am assuming you are trying to keep only alpha-numeric and space characters. Add a keypress event like this

private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
    var regex = new Regex(@"[^a-zA-Z0-9s]");
    if (regex.IsMatch(e.KeyChar.ToString()))
    {
        e.Handled = true;
    }
}