to validate for numbers and alphabets in c# asp.net2.0 in codebehind file

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to validate for numbers and alphabets in c# asp.net2.0 in codebehind file,the textbox should accept all numbers,alphabets,special characters...but textbox should not contain only numbers if it contains only numbers error message in alert box should be thrown..please help me how to code in c#.net in code behind file

Posted 28-Dec-12 18:47pm

nityasri

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2 solutions

Solution 2

Hi,

Try this:

C#

bool includesNotOnlyNumeric = Regex.IsMatch(textBox.Text, @"\D");
if (includesNotOnlyNumeric)
{
    // don't show an alert box
}
else
{
    // show an alert box
}

Posted 28-Dec-12 22:18pm

Thomas Daniels

Updated 28-Dec-12 22:19pm

v2

Comments

__TR__ 29-Dec-12 5:16am

5ed!

Thomas Daniels 29-Dec-12 5:33am

Thank you!

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OriginalGriff · Accepted Answer · 2012-12-28T21:16:00

Solution 1

You could use a Regex:

C#

string str = myTextBox.Text;
Regex includesNonNumeric = new Regex(@"[^\d]");
if (includesNonNumeric.IsMatch(str))
    {
    // OK
    }
else
    {
    // Failed
    }

Posted 28-Dec-12 21:16pm

OriginalGriff

Comments

nityasri 29-Dec-12 3:53am

what namespace we have to use here sir?

OriginalGriff 29-Dec-12 4:01am

Try adding:
using System.Text.RegularExpressions;

nityasri 29-Dec-12 4:02am

thank u griff

OriginalGriff 29-Dec-12 4:45am

You're welcome!

nityasri 29-Dec-12 4:05am

thanks a lot yaar...problem solved:)

__TR__ 29-Dec-12 5:16am

5ed!