How can I remove r n from a string in C Can I use a regular expression

Question

I am trying to persist string from an ASP NET textarea  I need to strip out the carriage return line feeds and then break up whatever is left into a string array of 50 character pieces   I have this so far  var commentTxt   new string        var cmtTb   GridView1 Rows rowIndex  FindControl  txtComments   as TextBox  if  cmtTb    null    commentTxt   cmtTb Text Length  gt  50         new    cmtTb Text Substring 0  50   cmtTb Text Substring 51           new    cmtTb Text     It works OK  but I am not stripping out the CrLf characters  How do I do this correctly

User · Answer

This splits the string on any combo of new line characters and joins them with a space  assuming you actually do want the space where the new lines would have been   var oldString    the quick brown rfox jumped over nthe box r nand landed on some rocks    var newString   string Join      Regex Split oldString        r n  n  r      Console Write newString       prints     the quick brown fox jumped over the box and landed on some rocks

User · Answer

You could use a regex  yes  but a simple string Replace   will probably suffice    myString   myString Replace   r n   string Empty

User · Answer

Assuming you want to replace the newlines with something so that something like this   the quick brown fox r n jumped over the lazy dog r n   doesn t end up like this   the quick brown foxjumped over the lazy dog   I d do something like this   string   SplitIntoChunks string text  int size        string   chunk   new string  text Length   size    1       int chunkIdx   0      for  int offset   0  offset  lt  text Length  offset    size                chunk chunkIdx      text Substring offset  size             return chunk         string   GetComments         var cmtTb   GridView1 Rows rowIndex  FindControl  txtComments   as TextBox       if  cmtTb    null                return new string                     I assume you don t want to run the text of the two lines together      var text   cmtTb Text Replace Environment Newline            return SplitIntoChunks text  50           I apologize if the syntax isn t perfect  I m not on a machine with C  available right now

User · Answer

Use   string json      r n   LOINC NUM      10362-2    r n    var result   JObject Parse json Replace System Environment NewLine  string Empty

User · Answer

Nicer code for this   yourstring   yourstring Replace System Environment NewLine  string Empty

User · Answer

The  Trim   function will do all the work for you   I was trying the code above  but after the  trim  function  and I noticed it s all  clean  even before it reaches the replace code   String input         This is an example string  r n r n  Trim method result   This is an example string     Source  http   www dotnetperls com trim

User · Answer

Try this   private void txtEntry KeyUp object sender  KeyEventArgs e                if  e KeyCode    Keys Enter                        string trimText               trimText   this txtEntry Text Replace   r n       ToString                this txtEntry Text   trimText              btnEnter PerformClick

User · Answer

Here is the perfect method   Please note that Environment NewLine works on on Microsoft platforms   In addition to the above  you need to add  r and  n in a separate function   Here is the code which will support whether you type on Linux  Windows  or Mac   var stringTest     r Test nThe Quick r n brown fox    Console WriteLine  Original is     Console WriteLine stringTest   Console WriteLine  -------------     stringTest   stringTest Trim   Replace   r   string Empty   stringTest   stringTest Trim   Replace   n   string Empty   stringTest   stringTest Replace Environment NewLine  string Empty    Console WriteLine  Output is       Console WriteLine stringTest   Console ReadLine

[c#] How can I remove "\r\n" from a string in C#? Can I use a regular expression?

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