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Is there a limited number of things that could be in the string? &nbsp;For example, is the string any alphabetic letters or just hex letters or is it decimal numbers and/or hex letters? &nbsp;I guess I'm trying to ask if there is any limitations on what is can possibly be in the string? &nbsp;<br />
Regular expressions are usually a good solution for this type of thing. &nbsp;If you can let me know the specifics of what might be in the field, I can give you some regular expression code to find what you are looking for.
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Is there a limited number of things that could be in the string?  For example, is the string any alphabetic letters or just hex letters or is it decimal numbers and/or hex letters?  I guess I'm trying to ask if there is any limitations on what is can possibly be in the string?  
Regular expressions are usually a good solution for this type of thing.  If you can let me know the specifics of what might be in the field, I can give you some regular expression code to find what you are looking for.

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How can I detect whether a string contains HEX or not?
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How can I detect whether a string contains HEX or not?

Detecting HEX

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