I am trying to use NOT operator with no success.

 My target is to test a string to make sure it is not "SuperAdmin" and i am unable to find any way of it

 [^SuperAdmin] doesn't work at all. Any help please.

 

 

The stuff between two square brackets, [...], called a character class or character set, will always match a single character.
For details, see: http://www.regular-expressions.info/charclass.html

If you want to negate a string, try a negative-look-ahead:

^(?!SuperAdmin$).*$

which will match any string except "SuperAdmin".

A short explanation:

^                 // the start of the string
(?!SuperAdmin$)   // NOT followed by 'SuperAdmin' followed by the end of the string
.*                // matches any character (except new line chars) zero or more times
$                 // followed by the end of the string

You mistake is a common one.  Here is another explanation of how the character class actually works. http://regexadvice.com/blogs/mash/archive/2008/01/31/A-touch-of-Character-Class.aspx

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Michael

"In theory, theory and practice are the same. In practice, they are not."
Albert Einstein