textbox validation please help urgent

akssmv · June 10th, 2007, 03:29 PM

i have a textbox in windows form. i need to validate it for integer values. i have tried using the regular expressions as follow.

Regex userNameMatch= new Regex("[0-9]*");

if(!userNameMatch.IsMatch(txtUserName.Text))
       {
        ..........
       }

i am trying to accomplish that if the user is not entering any value , including symbols such as " !@#$%^&*()" other than a number it should throw a message.

it would be great if any body could please help me out in this.

Regards
AKSSMV

joefawcett · June 11th, 2007, 01:45 AM

[0-9]* matches zero or more digits, if you want to exclude empty content you can use [0-9]+ which is one or more digits. You can use \d instead of [0-9] if you want to widen the scope to UNICODE digits.

--

Joe (Microsoft MVP - XML)

akssmv · June 11th, 2007, 07:40 AM

Thank you, i will try it out

Quote:

quote:Originally posted by joefawcett
[0-9]* matches zero or more digits, if you want to exclude empty content you can use [0-9]+ which is one or more digits. You can use \d instead of [0-9] if you want to widen the scope to UNICODE digits.

--

Joe (Microsoft MVP - XML)

akssmv · June 11th, 2007, 10:45 AM

Everything is working except the empty content i tried [0-9]+ in the Regex constructor but it's not working

i tried inputting "3333@@@" for example.

am i doing any mistake in coding...

please help.....

joefawcett · June 11th, 2007, 11:09 AM

Sorry, I think you need to make sure that the whole string is parsed:

Code:

^\d+$

^ means "begins with" and $ means "ends with".

--

Joe (Microsoft MVP - XML)

akssmv · June 11th, 2007, 11:19 AM

Thanks a lot, it's working now.

Quote:

quote:Originally posted by joefawcett
Sorry, I think you need to make sure that the whole string is parsed:

Code:

^\d+$

^ means "begins with" and $ means "ends with".

--

Joe (Microsoft MVP - XML)