validating text box to allow user define charactor

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I want to validate text box that first two charactor allow string 'ES' and after that it allow int value such as 123456.

I want like this:-ES45612 or es45612

Posted 1-Oct-12 2:22am

Raju2049

Updated 1-Oct-12 2:51am

v2

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MT_ · Answer 1 · 2012-10-01T03:11:00

Solution 2

You can try following regex.

C#

string myCheck = "^[E][S]\\w*";
string myStr = "ES12121";
if(Regex.IsMatch(myStr,myCheck,RegexOptions.IgnoreCase))
{
    Console.WriteLine("Yes, it starts with ES");
}
else
{
    Console.WriteLine("No Its not!!");
}
Console.ReadKey();

Hope that helps. If it helps, mark the answer as solution.

Thanks
Milind

Posted 1-Oct-12 3:11am

MT_

Comments

Raju2049 1-Oct-12 9:28am

Actually friend I need solution in asp.net.

MT_ 1-Oct-12 9:30am

<asp:RegularExpressionValidator ID="chk" runat="server"
ControlToValidate="txtBox"
ErrorMessage="First Two character must be ES!"
ValidationExpression="^[E][S]\w*" />

Amol_27101982, India · Answer 2 · 2012-10-01T02:29:00

Solution 1

Use Regular Expression Validator.
Visit folowing links for more details:
http://msdn.microsoft.com/en-us/library/ms972966.aspx[^]
http://www.w3schools.com/aspnet/control_regularexpvalidator.asp[^]
http://msdn.microsoft.com/en-us/library/ff650303.aspx[^]

Posted 1-Oct-12 2:29am

Amol_27101982, India