Remove all whitespace from C string with regex

Question

I am building a string of last names separated by hyphens  Sometimes a whitespace gets caught in there  I need to remove all whitespace from end result   Sample string to work on      Anderson -Reed-Smith   It needs to end up as  no space after Anderson       Anderson-Reed-Smith   The last name string is in a string variable  LastName   I am using a regular expression   Regex Replace LastName      s            The result of this is      Anderson -Reed-Smith    I also tried   Regex Replace LastName     s           and  Regex Replace LastName     s          What am I doing wrong

User · Answer

Fastest and general way to do this  line terminators  tabs will be processed as well   Regex powerful facilities don t really needed to solve this problem  but Regex can decrease performance                          new string                             stringToRemoveWhiteSpaces                                  Where                                                                       c   gt   char IsWhiteSpace c                                                                     ToArray lt char gt                                   OR                         new string                             stringToReplaceWhiteSpacesWithSpace                                  Select                                                                       c   gt  char IsWhiteSpace c          c                                                                    ToArray lt char gt

User · Answer

Using REGEX you can remove the spaces in a string   The following namespace is mandatory   using System Text RegularExpressions    Syntax   Regex Replace text     s

User · Answer

No need for regex  This will also remove tabs  newlines etc  var newstr   String Join    str Where c  gt  char IsWhiteSpace c       WhiteSpace chars   0009   000a   000b   000c   000d   0020   0085   00a0   1680   180e   2000   2001   2002   2003   2004   2005   2006   2007   2008   2009   200a   2028   2029   202f   205f   3000

User · Answer

Why use Regex when you can simply use the Trim   method  Text   lt    Eval  FieldDescription   ToString   Trim     gt     OR  string test    Testing       test Trim

User · Answer

Instead of a RegEx use Replace for something that simple   LastName   LastName Replace      String Empty

User · Answer

Below is the code that would replace the white space from the file name into given URL and also we can remove the same by using string empty instead of        if   string IsNullOrEmpty url                          string origFileName   Path GetFileName url              string modiFileName   origFileName Trim   Replace                       url   url Replace origFileName   modiFileName                          return url

User · Answer

Regex Replace does not modify its first argument  recall that strings are immutable in  NET  so the call  Regex Replace LastName     s           leaves the LastName string unchanged  You need to call it like this   LastName   Regex Replace LastName     s           All three of your regular expressions would have worked  However  the first regex would remove all plus characters as well  which I imagine would be unintentional

[c#] Remove all whitespace from C# string with regex

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