help with validating a textbox

[rodchar]

hey all,

i'm trying to validate a textbox on my form with the following expression:
0.a.0.a

meaning I need to make sure the user follows this pattern.
0-9
period
A-Z
period
0-9
period
a-z

can someone direct me to a good reference article because i can't find
anything basic with regular expressions in msdn help so far.

thanks,
rodchar

[Patrick Olurotimi Ige]

Try here:- http://www.regexlib.com/
It should help
Patrick
*** Sent via Developersdex http://www.developersdex.com ***

[Peter Blum]

Thankfully, you have mostly described the expression. It is:

^\d\.[A-Za-z]\.\d\.[A-Za-z]$

^ and $ force the text to be the entire text
\d = all digits
\. = period
[A-Za-z] = set of upper and lowercase letters.

--- Peter Blum
www.PeterBlum.com
Email: PL****@PeterBlum.com
Creator of "Professional Validation And More" at
http://www.peterblum.com/vam/home.aspx

"rodchar" <ro*****@discussions.microsoft.com> wrote in message
news:31**********************************@microsof t.com...

hey all,

i'm trying to validate a textbox on my form with the following expression:
0.a.0.a

meaning I need to make sure the user follows this pattern.
0-9
period
A-Z
period
0-9
period
a-z

can someone direct me to a good reference article because i can't find
anything basic with regular expressions in msdn help so far.

thanks,
rodchar

[rodchar]

thank you very much.

"Peter Blum" wrote:

Thankfully, you have mostly described the expression. It is:

^\d\.[A-Za-z]\.\d\.[A-Za-z]$

^ and $ force the text to be the entire text
\d = all digits
\. = period
[A-Za-z] = set of upper and lowercase letters.

--- Peter Blum
www.PeterBlum.com
Email: PL****@PeterBlum.com
Creator of "Professional Validation And More" at
http://www.peterblum.com/vam/home.aspx

"rodchar" <ro*****@discussions.microsoft.com> wrote in message
news:31**********************************@microsof t.com...

hey all,

i'm trying to validate a textbox on my form with the following expression:
0.a.0.a

meaning I need to make sure the user follows this pattern.
0-9
period
A-Z
period
0-9
period
a-z

can someone direct me to a good reference article because i can't find
anything basic with regular expressions in msdn help so far.

thanks,
rodchar