Menu
I know I can use RegEx to replace all occurrences of 'a', 'b', or 'c' with a blackslash character in a string like this:
string result = Regex.Replace(input, "[abc]", "\\");
But how can I replace each occurrence with a backslash followed by the character that matched?
896
To match a character having special meaning in regex, you need to use a escape sequence prefix with a backslash ( \ ). E.g., \. matches "." ; regex \+ matches "+" ; and regex \( matches "(" . You also need to use regex \\ to match "\" (back-slash).
Literal Characters and Sequences For instance, you might need to search for a dollar sign ("$") as part of a price list, or in a computer program as part of a variable name. Since the dollar sign is a metacharacter which means "end of line" in regex, you must escape it with a backslash to use it literally.
\n. Matches a newline character. \r. Matches a carriage return character.
In regular expressions, the period ( . , also called "dot") is the wildcard pattern which matches any single character. Combined with the asterisk operator . * it will match any number of any characters.
You can transform each Match using a MatchEvaluator delegate and this overload of Replace...
Regex.Replace(input, @"[abc]", m => string.Format(@"\{0}", m.Value))
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
