Regex to find comment in c# source file

Question

I can't get my regex to match the header of a c# code file. I basically want need to return the header if it exists.

Example:

#define debug
//****************************************************************************************************
//  <copyright file="" company="">
//      Copyright (c) . All rights reserved.
//  </copyright>
//  <project>Engine</project>
//****************************************************************************************************

code here

//some other comment here

more code here

//another comment here

My regex looks like this:

(?:/\\*(?:[^*]|(?:\\*\+[^*/]))*\\*\+/)|(?://.*)

but it only matches this line: //**********************************************************

and not the rest of the comment.

Comments can also end like this "*/".

whats wrong with my regex? why doesn't it catch the whole block?

I am using MultiLine, but it only returns 1 line and that's the first. I am coding in C# — user669550, Mar 21 '11 at 14:10

score 1 · Accepted Answer · answered Mar 21 '11 at 14:05

1

Try this one - and you can pull out the entire comment (with the "//" or the group within to get just the text. This will return a match for each line. Please use the "Multiline" option to run this:

^/[/|*](.+)$

answered Mar 21 '11 at 14:05

Josh M.

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Sure, it's unclear if the asker whats the // or /* or */ part of the comment or just the "body." – Josh M. Mar 21 '11 at 14:11
This also works, and again I didn't think it would return an array, but just a single block with the whole comment. – user669550 Mar 21 '11 at 14:17
I want the whole comment and not just the body:) – user669550 Mar 21 '11 at 14:17
This does return the whole comment - one line at a time. Instead of grabbing the value from the group, just grab the entire match value. – Josh M. Mar 21 '11 at 14:19

score 1 · Answer 2 · answered Mar 21 '11 at 14:05

1

Need multiline

(^\/\/.*?$|\/\*.*?\*\/)

answered Mar 21 '11 at 14:05

Stephen Chung

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This works, and actually my own example does also. I see that it returns and array with the resut, but I was just expecting a single string with the whole block:x – user669550 Mar 21 '11 at 14:16
Mine is a generic one for matching comments. If you just want to match your exact format (notice that it really is a bunch of //'s together), you can try: `(^//\*.*?$)+` (multiline). This will match all lines prefixed with `//*` in a single block. Sorry I wasn't clear with what you want before. – Stephen Chung Mar 22 '11 at 03:50
Now if you only want a block bracketed by stars (on the first and last line only): `(^//\*+?$(?:^//.*?$)^//\*+$)` – Stephen Chung Mar 22 '11 at 03:53

score 0 · Answer 3 · answered Jun 29 '16 at 01:36

0

Using the regex pattern: (/*([^]|[\r\n]|(*+([^/]|[\r\n])))*+/)|(//.)

see more https://code.msdn.microsoft.com/How-to-find-code-comments-9d1f7a29/

answered Jun 29 '16 at 01:36

frank tan

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score 0 · Answer 4 · answered Mar 21 '11 at 14:13

0

I guess you'd like to extract the pseudo-xml code so the following expression should work. Note that you'll still have to remove the leading "//" in each line.

//\*+\n((?://.*\n)+)//\*+

answered Mar 21 '11 at 14:13

Mario

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Regex to find comment in c# source file

4 Answers4

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