Commonly Used Regular Expressions : Regular Expression « Validation « ASP.NET Tutorial

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2. Validation
3. Regular Expression

Content                       Regular Expression 
E-mail address[*]             \S+@\S+\.\S+
Password                    \w+
Specific-length password    \w{4,10}
Advanced password             [aCzACZ]\w{3,9}
Another advanced password     [aCzACZ]\w*\d+\w*
Limited-length field          \S{4,10}
Social Security number        \d{3}-\d{2}-\d{4}