Allowing comma and Dot characters in Textbox

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I want textbox to allow letters,backspace,space,commas and dots on KeyPress Event ...

Please give me suggestion for this...

I have my code something like this

C#

public void Check(Object sender, KeyPressEventArgs e)
        {
            if (!char.IsLetter(e.KeyChar))
            {
                e.Handled = true;
            }
            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;
            }


        }

Posted 13-May-12 23:11pm

Rockstar_

Updated 12-Jul-20 4:10am

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Sandeep Mewara 14-May-12 5:29am

And the issue is?

4 solutions

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dharan1990 · Answer 1 · 2012-05-14T00:15:00

Solution 2

Its better to use the regular expression for that text box ..
Go through this link it will better useful to you to understand regular expression..

http://msdn.microsoft.com/en-us/library/ff650303.aspx[^]

I hope you have got it..

Posted 14-May-12 0:15am

dharan1990

akee seth · Answer 2 · 2012-05-14T00:44:00

Solution 4

http://www.regexlib.com/Search.aspx?k=special+characters&c=0&m=0&ps=20&p=2[^]

ues this link

Posted 14-May-12 0:44am

akee seth

Rockstar_ · Answer 3 · 2012-05-14T00:35:00

Hi,

C#

public void Check(Object sender, KeyPressEventArgs e)
       {
           //if (!char.IsLetter(e.KeyChar)||!char.IsNumber(e.KeyChar))
           //{
           //    e.Handled = true;
           //}
           if (char.IsLetter(e.KeyChar) || e.KeyChar == (char)Keys.Back || e.KeyChar == (char)Keys.Space || e.KeyChar=='.' || e.KeyChar==',' ||char.IsNumber(e.KeyChar))
           {

               // 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;
           }


       }

Member 14887422 · Answer 4 · 2020-07-12T04:10:00

it is very simple to use and always I use like this

char chr = e.KeyChar;
if (!char.IsControl(e.KeyChar) && !char.IsLetter(e.KeyChar) && !char.IsWhiteSpace(e.KeyChar) && chr!=',' && chr!='.' && chr!=8)
{
e.Handled = true;
//some statements like MessageBox.Show("Please Enter Valid Value");
}
// 8 stands for backspace
so your textbox only accepts dot,comman, backspace,space and letters other than that it will produce "please enter valid value".

Allowing comma and Dot characters in Textbox

4 solutions

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