How to trim " a b c " into "a b c" [duplicate]

Question

Possible Duplicate:
How do I replace multiple spaces with a single space in C#?

What is the most elegant way how to trim whitespace in strings like " a<many spaces>b c " into "a b c". So, repeated whitespace is shrunk into one space.

Answer 1

A solution w/o regex, just to have it on the table:

char[] delimiters = new char[] { ' '};   // or null for 'all whitespace'
string[] parts = txt.Split(delimiters, StringSplitOptions.RemoveEmptyEntries);
string result = String.Join(" ", parts);

Answer 2

You could use Regex for this:

Regex.Replace(my_string, @"\s+", " ").Trim();

Answer 3

Regex.Replace(my_string, @"^\s+|\s+$|(\s)\s+", "$1");

Answer 4

Use the Trim method to remove whitespace from the beginning and end of the string, and a regular expression to reduce the multiple spaces:

s = Regex.Replace(s.Trim(), @"\s{2,}", " ");

Answer 5

You can do a

Regex.Replace(str, "\\s+", " ").Trim()

http://msdn.microsoft.com/en-us/library/e7f5w83z.aspx