Restrict textbox from Special Characters and Numbers

Question

4.00/5 (1 vote)

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Hi Friends,

I have two textbox for username and password ,i want user to restrict special characters and numbers...

i have written the following code but it is not accepting backspace and space buttons.
if the user wants to edit the username and password, backspace button is not working.
This code i have written in KeyPress Event.

C#

if (!char.IsLetter(e.KeyChar))
            {
                e.Handled = true;
            }

Posted 11-May-12 1:37am

Rockstar_

Updated 18-Sep-20 1:18am

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2 solutions

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Manfred Rudolf Bihy · Accepted Answer · 2012-05-11T01:56:00

Solution 1

C#

if (char.IsLetter(e.KeyChar) || e.KeyChar == (char)Keys.Back || e.KeyChar == (char)Keys.Space)
{
    // These characters may pass
    e.Handled = false;
}
else
{
    // Everything that is not a letter, nor a backspace nor a space will be blocked
    e.Handled = true;
}

Hope that helps!

Regards,

Manfred

Posted 11-May-12 1:56am

Manfred Rudolf Bihy

Comments

Rockstar_ 11-May-12 8:03am

Thank You ur code solved my problem...

Manfred Rudolf Bihy 11-May-12 8:19am

You're welcome!
If it solved your problem I'd appreciate a vote. :)

BillW33 11-May-12 9:23am

You got a +5 from me. :)

Mayank Topiwala · Accepted Answer · 2012-05-11T02:01:00

Solution 2

Try this :-

if(e.KeyChar != 8 && e.KeyChar != 32)
      {
        if (!char.IsLetter(e.KeyChar))
            {
                e.Handled = true;
            }
       }

Hope this will help you :)

Posted 11-May-12 2:01am

Mayank Topiwala

Comments

Rockstar_ 11-May-12 8:05am

thanks...