RegEx Needed Please RSS

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  dch3

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  RegEx Needed Please

  Jan 15, 2013 01:15 AM|LINK

  I am in search of a RegEx that will strip out all non-numeric characters returning only the numeric characters.

  2301  Returns   2301
  2301-A  Returns   2301
  ABCD   Returns [Zero Length String]
  ~!@#$%^&*()_+|}{":?><`-=[]\';/.,   Returns [Zero Length String]

  And now that I thnk about it, also a second RegEx that strips out everything that is not a letter [A-Z][a-z].

   

  • Edited by dch3 on Jan 15, 2013 01:16 AM
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  Rion William...

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  26694 Points

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  Re: RegEx Needed Please

  Jan 15, 2013 01:18 AM|LINK

  To Remove Non-Numerical Characters:

  string numericOnly = Regex.Replace(yourString, @"[^\d]", "");

  or in method form :

  string NumericOnly(string yourString)
  {
      Regex numericOnly = new Regex(@"[^\d]");   
      return numericOnly.Replace(yourString, "");
  }

  To Remove All Non-Alphabetic:

  string alphabeticOnly = Regex.Replace(yourString, @"[^a-zA-Z]", "");

  and as a method : 

  string AlphabeticOnly(string yourString)
  {
      Regex alphaOnly = new Regex(@"[^a-zA-Z]");   
      return alphaOnly.Replace(yourString, "");
  }

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  • Edited by Rion Williams on Jan 15, 2013 01:21 AM
  • Edited by Rion Williams on Jan 15, 2013 01:21 AM
  • Edited by Rion Williams on Jan 15, 2013 01:23 AM
  • Edited by Rion Williams on Jan 15, 2013 01:24 AM
  • Edited by Rion Williams on Jan 15, 2013 01:29 AM
  • Edited by Rion Williams on Jan 15, 2013 01:33 AM
  • Edited by Amy Peng - MSFT on Jan 22, 2013 01:08 AM
  • Marked as answer by Rion Williams on Mar 07, 2013 09:55 PM
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  Rion William...

  All-Star

  26694 Points

  4414 Posts

  Re: RegEx Needed Please

  Mar 07, 2013 09:55 PM|LINK

  I'm throwing an updated answer as it was brought to my attention that this was posted in the Visual Basic forum so I'll provide the same answers but with Visual Basic syntax : 

  To Remove Non-Numerical Characters:

  Dim numericOnly As String = Regex.Replace(yourString, @"[^\d]", "")

  or in method form :

  Function NumericOnly(ByVal yourString As String) As String
  {
      Dim numericOnly As new Regex(@"[^\d]") 
      return numericOnly.Replace(yourString, "")
  }

  To Remove All Non-Alphabetic:

  Dim alphabeticOnly As String = Regex.Replace(yourString, @"[^a-zA-Z]", "")

  and as a method : 

  Function AlphabeticOnly(ByVal yourString As String) As String
  {
      Dim alphaOnly = new Regex(@"[^a-zA-Z]")
      return alphaOnly.Replace(yourString, "")
  }

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