How to replace a char in string with an Empty character in C NET

Question

I have a string like this   string val    123-12-1234     How can I replace the dashes using an empty string in C    I mean val Replace char oldChar  newChar    What needs to go in oldChar and newChar

User · Accepted Answer

You can use a different overload of Replace   that takes string   val   val Replace  -   string Empty

User · Answer

Since the other answers here  even though correct  do not explicitly address your initial doubts  I ll do it   If you call string Replace char oldChar  char newChar  it will replace the occurrences of a character with another character  It is a one-for-one replacement  Because of this the length of the resulting string will be the same   What you want is to remove the dashes  which  obviously  is not the same thing as replacing them with another character  You cannot replace it by  no character  because 1 character is always 1 character  That s why you need to use the overload that takes strings  strings can have different lengths  If you replace a string of length 1  with a string of length 0  the effect is that the dashes are gone  replaced by  nothing

User · Answer

val Replace  -          MSDN Source

User · Answer

If you want to replace a char in a string with an empty char that means you want to remove that char from a string  read the answer of R  Martinho Fernandes   Here is an exemple of how to remove a char from a string  replace with an  Empty char         public static string RemoveCharFromString string input  char charItem                int indexOfChar   input IndexOf charItem           if  indexOfChar  gt   0                        input   input Remove indexOfChar  1                     return input          or this version that removes all recurrences of a char in a string         public static string RemoveCharFromString string input  char charItem                int indexOfChar   input IndexOf charItem           if  indexOfChar  lt  0                        return input                    return RemoveCharFromString input Remove indexOfChar  1   charItem

User · Answer

string val    123-12-1234    val   val Replace  -           result  123121234

User · Answer

It always bothered me that I can t use the String Remove method to get rid of instances of a string or character in a string so I usually add theses extension methods to my code base  public static class StringExtensions       public static string Remove this string str  string toBeRemoved                return str Replace toBeRemoved   quot  quot               public static string RemoveChar this string str  char toBeRemoved                return str Replace toBeRemoved ToString     quot  quot              The one taking char can t use overload semantics unfortunately since it will resolve to string Remove int startIndex  since it is  quot closer quot  This is of course purely esthetics  but I like it

User · Answer

If you are in a loop  let s say that you loop through a list of punctuation characters that you want to remove  you can do something like this         private const string PunctuationChars                      foreach  var word in words                                        var word modified   word                       var modified   false                       foreach  var punctuationChar in PunctuationChars                                                if  word IndexOf punctuationChar   gt  0                                                        modified   true                              word modified   word modified Replace      punctuationChar                                                                                  MORE CODE                    The trick being the following   word modified Replace      punctuationChar

User · Answer

This seems too simple  but   val Replace  -

User · Answer

I have a latin version of the code of Razvan Dumitru because us use a million indicator even  Offcourse I use a double replace  D  public static string CleanNumb string numb         foreach  char c in                 numb   numb Replace c             return numb Replace

[c#] How to replace a char in string with an Empty character in C#.NET

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