How do I make a textbox that only accepts numbers by masking?

Question

I have got a text box in WinForms which is just for entering phone numbers. how can I do it by just masking it. I have used if instruction but i want to use the mask. actually my biggest problem was that I didn't know even where is the mask text box.

Duplicate of [How do I make a textbox that only accepts numbers?](http://stackoverflow.com/questions/463299/how-do-i-make-a-textbox-that-only-accepts-numbers), [How to Force only numeric values be allowed in maskedtextbox?](http://stackoverflow.com/questions/10758683/how-to-force-only-numeric-values-be-allowed-in-maskedtextbox) and many others. Please use the search. :-) — CodeCaster, Dec 21 '13 at 17:12
I have seen that question before. it used the if instruction. I wanna do it by masking. — sesideh, Dec 21 '13 at 17:16
There is nothing wrong with `if`, but for masking see see the second link. Please show some effort from your side. :-) — CodeCaster, Dec 21 '13 at 17:21
I have to say that if you use if instruction when you have more than 5 or 6 forms it takes a lot of time that your program perform its task. — sesideh, Dec 21 '13 at 17:23
That does not seem to make any sense. An few `if`'s won't be considerably slower or faster than a masked textbox, they both evaluate in at most a few miliseconds. — CodeCaster, Dec 21 '13 at 17:25
but it does have different. any way thanks for your help. i will show more effort. — sesideh, Dec 21 '13 at 17:29

Yurii · Answer 1 · 2013-12-21T17:26:14.773

0

You can use the MaskedTextBox class.
Update
See Mask property Remarks section for more details.

edited Dec 21 '13 at 17:26

answered Dec 21 '13 at 17:13

Yurii

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would you please write me the full code.\ – sesideh Dec 21 '13 at 17:20
3

Immediate OP -1 for 'please write me the full code' – Martin James Dec 21 '13 at 17:21

score 0 · Answer 2 · answered Dec 21 '13 at 17:15

0

You can use Char.IsDigit() function to check the user input.

Try This:

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

answered Dec 21 '13 at 17:15

Sudhakar Tillapudi

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I don't want if instruction. it isn't useful when you have more than 5 or 6 form – sesideh Dec 21 '13 at 17:19

score 0 · Accepted Answer · answered Dec 21 '13 at 19:42

How to Add MaskedTextBox in .NET

Steps

Click on Toolbox in the left-side Bar Navigate and Find MaskedTextBox .NET Component Double click on it to get it on Windows Form

Steps

Click on Properties in Right-sidebar. It appears as shown in the image below Click on Set Mask or directly click on Browse button A dialog box appears put value according to your requirement in Mask labeled Textbox Click Ok

How do I make a textbox that only accepts numbers by masking?

3 Answers3