Question

I have a string that contains various symbols, but I need to get a 10-alphanumeric substring that is located between % and % – but there might be more than one combination of % and % in one string

Example: %bla1234bla%, or %12aa22bb33% etc. (I don’t need the %)

I tried this:

String resultString = Regex.Match(lnk, @"\[%\](.*?)\[%\]{10}").Value;

and it does not work

Answer 1

(?<=%)[\da-zA-Z]{10}(?=%)

By looking positive lookahead and lookbehind, this will match the 10 alphanumeric characters between % chars, without actually matching the % chars.