Remove blank lines and white spaces from a string? RSS

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  EkRaghu

  Member

  17 Points

  59 Posts

  Remove blank lines and white spaces from a string?

  Dec 12, 2008 02:42 PM|LINK

   I want to remove unwanted blank lines and white spaces from a string.

  Sample Snippet

  String RemoveLines= "world                                                       usa  

   

  europe        
  

   

   

  china
  

  ";

  Output Needed:

   String Removelines="world usa

  europe

  china;

  Say for example you have 8 blank lines between 1st and 10th line and want to remove 7 blank lines and keep just one blank line. Same with white spaces, just want to keep single white space.
  

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  ldechent

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  6326 Points

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  Re: Remove blank lines and white spaces from a string?

  Dec 12, 2008 04:56 PM|LINK

  You can trim excess white spaces from a string

  Example: mystring ="  something     "

  with .Trim()

  mystring.Trim() = "something"

  If you want a trailing white space you could add it on after trimming it.

  -Larry

  Larry Dechent
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  hs_jha

  Contributor

  2364 Points

  590 Posts

  Re: Remove blank lines and white spaces from a string?

  Dec 12, 2008 05:10 PM|LINK

  how bout taking input with start and end black space trimmed.

  for that matter you only need to use

  string text = "  My test\nstring\r\n is\t quite long  ";
  string trim = text.Trim();

  for trimming white space inside string you can use Regular expression..

  string trim = Regex.Replace( text, @"\s", "" );

   “\s” means any space or tab or line feed or newline.. 

  ---

  asp.net consultant

  ---

  
  
  
  • Edited by hs_jha on Dec 12, 2008 05:14 PM
  • Edited by hs_jha on Dec 12, 2008 05:17 PM
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  TATWORTH

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  Re: Remove blank lines and white spaces from a string?

  Dec 16, 2008 07:20 AM|LINK

  How about
  

  while (RemoveLines.Instr(" ") > -1)
  {
    RemoveLines = RemoveLines.Replace("  "," ")
  }
  while (RemoveLines.Instr("\n\n") > -1)
  {
    RemoveLines = RemoveLines.Replace("\n\n","\n")
  }
  

  This will of course need to be unit tested.
  

  Click "Mark as Answer" on the post that helped you.
  This earns you a point and marks your thread as Resolved so we will all know you have been helped.
  FAQ on the correct forum http://forums.asp.net/p/1337412/2699239.aspx#2699239
  • Edited by TATWORTH on Dec 16, 2008 07:31 AM
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  imran_ku07

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  Re: Remove blank lines and white spaces from a string?

  Dec 16, 2008 07:46 AM|LINK

  EkRaghu

  String RemoveLines= "world                                                       usa  

   

  europe        
  

   

   

  china
  

  ";

   

  this won't work without @ sign.

  By the way 

   Check this work's   String1.Replace("  "," ");

  OR 

  replace 2 space with one or check that if previous charecter and next charecter is space then not add this like

  String NewString=""; 

  for(int i=0;i<String1.Length;i++)
  {
  if(i+1<String1.Length) //check next charecter is present
  {
  if((String1[i]=' ')&&(String1[i+1]=' '))
  {
          continue;
  }
  else
          NewString+=String[i].Tostring();
   }
  else
        NewString+=String[i].Tostring();
  } 

  "And whoever is removed away from the Fire and admitted to Paradise, he indeed is successful." (The Holy Quran)
  Excellent Windows VPS Hosting
  Imran Baloch MVP, MVB, MCP, MCTS, MCPD
  • Marked as answer by Bober Song - MSFT on Dec 18, 2008 07:58 AM
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  sirdneo

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  2509 Posts

  Re: Remove blank lines and white spaces from a string?

  Dec 17, 2008 09:54 AM|LINK

  Check out this simple fuction which does the trick for you:-

   

  private string process(string s)
      {
          int len = s.Length;
          int current=0;
          StringBuilder sb = new StringBuilder(len);
  
          while (current < len-1)
          {
              if (!(s[current] == ' ' && s[current + 1] == ' ') &&
                  !(s[current] == '\n' && s[current + 1] == '\n')
                  )
              {
                  sb.Append(s[current]);
              }
              current++;
          }
          return sb.ToString();
  
      }
  

  string manipulation

  Thanks,
  Zeeshan Umar
  ~Please Mark As Answer, one or multiple posts, which helped you. So that it might be useful for others~
  • Marked as answer by Bober Song - MSFT on Dec 18, 2008 07:57 AM
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  Srinivasan.S

  Member

  8 Points

  4 Posts

  Re: Remove blank lines and white spaces from a string?

  Dec 22, 2008 04:01 AM|LINK

  I've String s="aero plane";

  the expected output is "aeroplane"..

  is this possible to remove the blank spaces present in the middle?

  Thanks in advance....
  

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  imran_ku07

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  Re: Remove blank lines and white spaces from a string?

  Dec 22, 2008 04:06 AM|LINK

  s=s.replace(" ","")
  "And whoever is removed away from the Fire and admitted to Paradise, he indeed is successful." (The Holy Quran)
  Excellent Windows VPS Hosting
  Imran Baloch MVP, MVB, MCP, MCTS, MCPD
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  Srinivasan.S

  Member

  8 Points

  4 Posts

  Re: Remove blank lines and white spaces from a string?

  Dec 22, 2008 04:53 AM|LINK

  thanks yar... I thought that it 'll work only for character and not for string... Just now came to know it 'll work for string also.... Thanks for ur reply....
  

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  rami_nassar

  Contributor

  3608 Points

  828 Posts

  Re: Remove blank lines and white spaces from a string?

  Dec 22, 2008 05:08 AM|LINK

  try this

   

  while (RemoveLines.Instr(" ") > -1)
  {
    RemoveLines = RemoveLines.Replace("  "," ")
  }
  while (RemoveLines.Instr("\n\n") > -1)
  {
    RemoveLines = RemoveLines.Replace("\n\n","\n")
  }

   

  Regards,
  Nassar, Rami (MCP, MCTS, MCPD)
  My Blog || E-Mail
  
  Don't forget to click "Mark as Answer" on the post that helped you.