How to restrict customer only input number in text box not character or symbol...in windows application..

Question

3.00/5 (2 votes)

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.NET3.0

sir i try to restrict textbox only contain number not character or Symbol but i get problem to do this task.......

plz help me....

Posted 11-Aug-12 0:43am

Shambhoo kumar

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3 solutions

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Ank_ush · Accepted Answer · 2012-08-15T21:30:00

Solution 3

Try this:-

C#

private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
     if ((e.KeyChar >= 'a' && e.KeyChar <= 'z') || (e.KeyChar >= 'A' && e.KeyChar <= 'Z'))
      {
           e.Handled = true;
           MessageBox.Show("Enter only Number not Character.", "TextBox Message", MessageBoxButtons.OK, MessageBoxIcon.Error);
       }
}

Your Problem is solved.

Posted 15-Aug-12 21:30pm

Ank_ush

Updated 15-Aug-12 21:32pm

v2

Comments

Shambhoo kumar 18-Aug-12 1:19am

Thanks...

Ank_ush 18-Aug-12 8:46am

Welcome...

Ank_ush 18-Aug-12 8:46am

Just vote my answer and accept as solution.

fjdiewornncalwe 28-Aug-12 9:12am

So what happens when a user clicks on the arrow keys, or delete, or enter. These are all still valid keystrokes that must be considered.

Ank_ush 28-Aug-12 13:20pm

Arrow Buttons, Enter button, etc they donot enter text when pressed, they have different behaviour.

fjdiewornncalwe 28-Aug-12 13:26pm

You are correct that the arrow buttons do not throw a keypress, however the enter, backspace, etc. do throw a keypress.

WebMaster · Accepted Answer · 2012-08-11T01:20:00

Solution 1

Hi friend.
try this:

C#

private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
     e.Handled = !(char.IsDigit(e.KeyChar) || char.IsControl(e.KeyChar));
}

Posted 11-Aug-12 1:20am

WebMaster

Updated 28-Aug-12 3:28am

v3

Comments

Shambhoo kumar 18-Aug-12 1:18am

Thanks..

[no name] 28-Aug-12 7:23am

I think your solution will do just the opposite, did you try it before posting?

EDIT: I see that you have edited the code. Should work now.

fjdiewornncalwe 28-Aug-12 9:13am

So what happens when a user clicks on the arrow keys, or delete, or enter. These are all still valid keystrokes that must be considered.

[no name] 28-Aug-12 9:29am

You are right; but I just give him/her a lead.
Anyway I improved my solution.

Sarrrva · Accepted Answer · 2012-08-11T01:24:00

Solution 2

Also use this one

C#

private void textBox1_KeyDown(object sender, KeyEventArgs e)
       {
            if ((e.KeyCode >= Keys.D0 && e.KeyCode <= Keys.D9)||(e.KeyCode==Keys.Enter)||(e.KeyCode>=Keys.Up && e.KeyCode<=Keys.Down)||(e.KeyCode==Keys.Left))


           {
           }
           else
           {
               textBox1.Text = "";
           }
       }

i agree with you Marcus Kramer

regards
sarva

Posted 11-Aug-12 1:24am

Sarrrva

Updated 28-Aug-12 7:43am

v4

Comments

Shambhoo kumar 18-Aug-12 1:19am

Thanks.

Sarrrva 18-Aug-12 11:15am

welcome friend!!!!

fjdiewornncalwe 28-Aug-12 9:12am

So what happens when a user clicks on the arrow keys, or delete, or enter. These are all still valid keystrokes that must be considered.