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I'm having some difficulty with a specific Regex I'm trying to use. I'm searching for every occurrence of a string (for my purposes, I'll say it's "mystring") in a document, EXCEPT where it's in a tag, e.g.
<a href="_mystring_"> should not match, but
<a href="someotherstring">_mystring_</a> Should match, since it's not inside a tag (inside meaning "inside the < and > markers") I'm using .NET's regex functions for this as well.
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Example is: string pattern = @"(Band) (? <Band>[A-Za-z ]+) (? <City>@[A-Za-z ]+) (?
Use the test() method to check if a regular expression matches an entire string, e.g. /^hello$/. test(str) . The caret ^ and dollar sign $ match the beginning and end of the string. The test method returns true if the regex matches the entire string, and false otherwise.
Regular expressions, or regex for short, are a series of special characters that define a search pattern. These expressions can remove lengthy validation functions and replace them with simple expressions.
There's two ways to say "don't match": character ranges, and zero-width negative lookahead/lookbehind. Also, a correction for you: * , ? and + do not actually match anything. They are repetition operators, and always follow a matching operator.
This should do it:
(?<!<[^>]*)_mystring_ It uses a negative look behind to check that the matched string does not have a < before it without a corresponding >
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