Regular expressions are much easier to understand if you use the following syntax and comment each component of the expression by using a number sign (#).
To enable comments, you must also specify Regex Options.
Microsoft is conducting an online survey to understand your opinion of the Msdn Web site.If you choose to participate, the online survey will be presented to you when you leave the Msdn Web site. I have applied this in one of my projects and its working there. ([a-z A-Z0-9] (\.[a-z A-Z0-9] ) .*)$ Let me know if you face any problem.There are probably thousand different regexps for URI validation.. Technical support for the Microsoft products and technologies referenced in this guidance is provided by Microsoft Support Services. It is provided as a courtesy for individuals who are still using these technologies.
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You can use them to constrain input, apply formatting rules, and check lengths. This How To shows how you can use regular expressions within ASP. Objectives Overview Using a Regular Expression Validator Control Using the Regex Class Common Regular Expressions Additional Resources If you make unfounded assumptions about the type, length, format, or range of input, your application is unlikely to be robust.
To validate input captured with server controls, you can use the Regular Expression Validator control. Input validation can become a security issue if an attacker discovers that you have made unfounded assumptions.
Enclosing the expression in the caret (^) and dollar sign ($)markers ensures that the expression consists of the desired content and nothing else.
A ^ matches the position at the beginning of the input string and a $ matches the position at the end of the input string.
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