Validation for Textbox to avoid alphabets and other characters

Question

0.00/5 (No votes)

See more:

hi frnds,

how to validate the Textbox with numbers. User should not enter alphabets or other characters...ONLY HE SHOULD ENTER $ DIGIT NUMBER.

user must enter only 4 digits as 2010.

So, how can we do this, do u have idea, please give me a good solution.

Thanks.

Posted 4-Jul-12 20:46pm

Ubaid ur Rahman IT

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Prasad_Kulkarni · Accepted Answer · 2012-07-04T20:50:00

Solution 1

Try this:

C#

void CharacterValidation(object sender, KeyPressEventArgs e)
       {
           if ((e.KeyChar >= 65 && e.KeyChar <= 90) || (e.KeyChar >= 97 && e.KeyChar <= 122) || e.KeyChar == 32 || e.KeyChar == 8 || e.Keychar != 36)
           {
               e.Handled = false;
           }
           else
           {
               e.Handled = true;
           }
       }

user must enter only 4 digits as 2010.
You need to set textBox1.MaxLength = 4;

Posted 4-Jul-12 20:50pm

Prasad_Kulkarni

Updated 4-Jul-12 20:52pm

v3

Comments

Prasad_Kulkarni 5-Jul-12 3:14am

No reason & a down-vote from Scholar Member.

Not fair enough.

You MUST have to give reason for down-vote.

[no name] 5-Jul-12 4:51am

+5

Prasad_Kulkarni 5-Jul-12 5:21am

Thank you!