Issue with Regex Replace

Question

I am trying to replace every occurrence of "]}]" (ignore the quotes) using the Regex object in C#.

I have set up the Regex Escape value like this:

var regexReplaceVar = new Regex(Regex.Escape("]}]"));

I then call the replace method as shown below:

myEditedString = regexReplaceVar.Replace(startString, sringToInsert, 1);

It does not appear to be working the way I think it would. Are the characters I am attempting to replace special to Regular Expressions? Should they be modified to have them be taken as literals?

Thanks in advance.

This form Replace(input,replacement,count) just does count replacements. Is that the problem? — user557597
– user557597, Commented Dec 26, 2013 at 20:47
"It does not appear to be working the way I think it would." Describe how you think it should work, and how it is working. — Jim Mischel
– Jim Mischel, Commented Dec 26, 2013 at 21:04

abc123 · Accepted Answer · 2013-12-26 20:13:40Z

3

Description:

All of the characters you are seeking must be escaped in C# Regex.

Regex:

\]\}\]

C#:

Regex regexObj = new Regex(@"\]\}\]", RegexOptions.IgnoreCase);
string result = regexObj.Replace(subjectString, replaceWith);
Console.WriteLine(result);

result holds the replaced string, this is important because subjectString doesn't change

MSDN on Regex.Replace

answered Dec 26, 2013 at 20:13

abc123

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1 Comment

user557597 Over a year ago

I don't think as a stand alone regex string combination, that any of these characters need to be escaped.

Victor Axelsson · Accepted Answer · 2013-12-26 21:18:53Z

0

Whenever I use regex I use this page to test them: http://rubular.com/

If you feel uncertain how to use regex I recommend the following article and page: http://www.regular-expressions.info/replacetutorial.html

And if you are using common regex expression e.g time and date formatting you can search for pre-formatted expressions here: regexlib.com

edited Dec 26, 2013 at 21:18

answered Dec 26, 2013 at 20:20

Victor Axelsson

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2 Comments

user557597 Over a year ago

Not sure, but don't think this is true in Dot-Net's regex 'Replace` method. ie: its not like ^..$

Jim Mischel Over a year ago

You are not correct. the string "asd]}]asd" will match the OP's expression. It's looking for "]}]" anywhere in the string.

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