Replace a character inside a string using C# Regex
c#, regex, string
Solution
var regex = new Regex(@"(?<=\[[^\[\]]*),(?=[^\[\]]*\])");
return regex.Replace(<your sample string>, ".");
Within the regex pattern, to the left of the `,` is a positive lookbehind zero-width assertion that means there must be a `[` and then zero or more characters that are neither `[` nor `]` leading up to the comma.
After the comma, a positive lookahead zero-width assertion that means there can be zero or more characters that are neither `[` nor `]` then there must be a closing `]`.
Zero-width assertions mean that the pattern must precede or follow the matched text, but are not part of the match. Since we are only matching the `,` our replacement is just the `.`
Problem
I would like to know how to replace `,` characters inside array brackets `[]` with another character, say `.`. The string expression I have is below: Attributes["412324 - PENNDOT I-95", "Category"].Value, Attributes["412324 - PENNDOT I-95", "Category"].Code The expected output should be: Attributes["412324 - PENNDOT I-95". "Category"].Value, Attributes["412324 - PENNDOT I-95". "Category"].Code