Regular Expression for Phone Number

[Jake K]

I have a textbox (txtPhoneNumber) that either has to contain 10 numbers (no
other characters) and cannot start with a 1. However... either this textbox
must contain a valid numbr (10 digits and cant start with 1) or it can be
totally blank. What is the best reg expression to use? How is it built?
Are there good utils out there to define expressions?
Thanks a lot.

 

[Patrick.O.Ige]

See
http://www.regexlib.com
Hope that helps
Patrick

 

[Rad [Visual C# MVP]]

I have a textbox (txtPhoneNumber) that either has to contain 10 numbers (no
other characters) and cannot start with a 1. However... either this textbox
must contain a valid numbr (10 digits and cant start with 1) or it can be
totally blank. What is the best reg expression to use? How is it built?
Are there good utils out there to define expressions?
Thanks a lot.

ASP.NET regex validators seem to let through controls with no text so
blanks won't be a problem. As for the digits try this regex:

^[0,2-9]\d{9}$