Restrict entering character in textbox

Question

2.67/5 (3 votes)

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C#2.0

C#

How to restrict a user entering character in textbox,the textbox is exclusively for entering Mobile no.

Posted 28-Mar-11 19:15pm

Bhavna v

Updated 28-Mar-11 19:43pm

Brijesh Kr

v3

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4 solutions

Solution 4

Use Regular expressions
Follow the links

http://www.dotnetspider.com/forum/140521-How-restrict-my-User-enter-only-characters-n.aspx[^]

http://aspdotnet-suresh.blogspot.com/2010/12/how-to-restrict-user-to-enter-only.html[^]

http://support.microsoft.com/kb/198649[^]

Posted 28-Mar-11 19:25pm

Uday Kumar B R

Updated 28-Mar-11 19:30pm

v3

Comments

m@dhu 29-Mar-11 1:31am

Fixed the links.

Solution 2

Hope this[^] might help you.

Posted 28-Mar-11 19:21pm

Ramalinga Koushik

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**JF2015** · Accepted Answer · 2011-03-28T19:20:00

C#

private void txtType1_KeyPress(object sender, KeyPressEventArgs e)
{
     int isNumber = 0;
     e.Handled = !int.TryParse(e.KeyChar.ToString(), out isNumber);
}

or:

C#

private void txtType2_KeyPress(object sender, KeyPressEventArgs e)
{
     if (!System.Text.RegularExpressions.Regex.IsMatch(e.KeyChar.ToString(), "\\d+"))
          e.Handled = true;
}

See here:
http://www.vcskicks.com/numbers_only_textbox.php[^]

Brijesh Kr · Accepted Answer · 2011-03-28T19:22:00

Hi, Bhavna
Try a easy solution

C#

private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
        {
            if ((e.KeyChar >= 65 && e.KeyChar <= 91) || (e.KeyChar >= 97 && e.KeyChar <= 123))
            {
                if (i && e.KeyChar == 69)
                {
                    i = false;
                }
                else if (e.KeyChar!=69)
                {
                    e.Handled = true;
                }



                }
        }

there are some more ways you should find out, it's work

Restrict entering character in textbox

4 solutions

Solution 1

Solution 3

Solution 4

Solution 2

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