CODEWITHSUNDEEP
c#
Caladan
Caladan

Reputation: 33

How do I replace all occurences of a multiline string in another string?

I'm trying to replace all occurences of a multiline string in another string. Assuming that input contains the input text, output contains the resulting text, searchText contains the multiline string to be found and replaceText contains the replaced multiline string, I used this code:

output = input.Replace(searchText, replaceText);

The problem is that it works only with single line strings (that don't include newlines). How could I make it work for strings that contain newlines?

e.g.

searchText = "ABC\nDEF";

replaceText = "text";

input:

ABC
DEF
KLF
Z

output:

text
KLF
Z

Upvotes: 0

Views: 1292

Answers (1)

kurakura88
kurakura88

Reputation: 2305

You need to know what the new line is in the input. It could be LF only, but it could be CR+LF.

I am a little bit lazy to explain, so please read this Wikipedia about new line: https://en.wikipedia.org/wiki/Newline

So your problem might be because CR is also there, which makes that the string to search does not match at all. One solution is to set your search text as:

searchtext = "ABC" + System.Environment.NewLine + "DEF";

System.Environment.NewLine deals with the new line for you better. See the reference in msdn: https://msdn.microsoft.com/en-us/library/system.environment.newline(v=vs.110).aspx

Upvotes: 4

Related Questions