I want to replace \" characters in a string like \"someword\". But this regex "(\\\")+" doesn't work.
Regex.Replace(string_, "(\\\")+", String.Empty);
2 Answers
Non-escaped quote removal
If your task is just to remove all non-escaped double quotes, you do not need any regex, just use
s = old_s.Replace("\"", string.Empty);
Literally-escaped quotes
In case you can have more than just a double quote escaped in your input, you'd need a more robust solution that will keep all other escaped symbols intact. It is possible to do with a match evaluator:
var old_text= @"\\""someword\"""; // Literal \\"someword\", escaped backslash at the start
var stext = Regex.Replace(old_text, @"\\(.)",
m => m.Groups[1].Value == "\"" ? "\"" : m.Groups[1].Value);
Result - only the last " is changed as it is the only literally escaped double quote:
1 Comment
Wiktor Stribiżew
If your task is just to remove all
"s, you do not need any regex, just use s = old_s.Replace("\"", string.Empty);.Try:
var myNewString = Regex.Replace(string_, "(\\\")+", String.Empty);
as you can see from MSDN Regex.Replace documentation this method has a return value of type string
The documentation states that this value is:
Return Value
Type: System.String
A new string that is identical to the input string, except that the replacement string takes the place of each matched string. If pattern is not matched in the current instance, the method returns the current instance unchanged.
1 Comment
Wiktor Stribiżew
Note that
"(\\\")+" is in fact \"+ regex, and is equal to just "+ as a double quote does not need to be escaped. Is the task to just replace " with empty string?
"with empty string? Then you do not need any regex, justs = old_s.Replace("\"", string.Empty);.