Remove empty line from string

Question

How can I remove empty line from a string for example:

Turn this: alt text

To This: alt text

I used this code text.Replace("\n",""); but it turns it to:

testtesttes

Answer 1

Best Answer

Answer by Arkaid · Jul 11, 2016 at 08:56 AM

Ahhh, you almost had it!

 text.Replace("\n\n", "\n");

Is what you are looking for.

That said, that only replaces a single line. If you had two empty lines in a row, the above code will clear the first one but leave the second one empty. So to run a more generic replacement, you need to use regular expressions. This would work in every situation

 using System.Text.RegularExpressions;
 string result = Regex.Replace(sourceString, @"^\s*$[\r\n]*", string.Empty, RegexOptions.Multiline);

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Answer 2

Answer by allenallenallen · Jul 11, 2016 at 09:04 AM

You're replacing all new lines to nothing so of course all the text are shoved together.

You want to replace all multiple new lines with only a single new line.

Check out this similar question: http://stackoverflow.com/questions/1725942/how-can-i-replace-multiple-line-breaks-with-a-single-br

This Regex will work for your purpose as it will replace multiple occurrence of \n with a single \n.

 string formatted = Regex.Replace(original, @"[\n]{2,}", "\n");

Or without Regex:

 int oldLength;
 do {
     oldLength = str.Length;
     str = str.Replace("\n\n", "\n");
 } while(str.Length != oldLength);

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Remove empty line from string

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