Validate mobile numbers based in South Africa. RSS

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  Gremlin1708

  Member

  500 Points

  141 Posts

  Validate mobile numbers based in South Africa.

  Jun 24, 2011 10:28 AM|LINK

  Hi everyone..

  I created this code that i think will be of big value for people working with mobile numbers in South Africa.

  I created regular expressions to validate it.

  On your page just include the following reference

  using System.Text.RegularExpressions;

  then i created the following two methods.

  This one will strip all non Numeric characters from the string you pass in and then convert it to international format...

  public static string StripNumber(string p_Number)
          {
              try
              {
                  string cleanNumber = "";
                  //Strip all the invalid chars.
                  for (int inum = 0; inum < p_Number.Length; inum++)
                  {
                      try
                      {
                          if (Convert.ToInt16(p_Number.Substring(inum, 1)) >= 0 &&
                                  Convert.ToInt16(p_Number.Substring(inum, 1)) <= 9)
                          {
                              cleanNumber += p_Number.Substring(inum, 1);
                          }
  
                      }
                      catch
                      {
  
                      }
  
                  }
                  //make sure that the number gets converted to international Number format excluding +
                  if (cleanNumber.StartsWith("0"))
                  {
                      return "27" + cleanNumber.Substring(1, cleanNumber.Length - 1);
  
                  }
                  else if (cleanNumber.StartsWith("27"))
                  {
                      return cleanNumber;
                  }
                  else
                  {
                      MessageBox.Show("Please check the validation of this number : " + cleanNumber);
                      return cleanNumber;
                  }
              }
              catch (Exception ex)
              {
                  return "";
              }
          }

  Now here is the big one :-) it takes your number that you pass in, call the stripNumber and then goes to the regular expression part and validates the string

          public static Boolean ValidateNumber(string p_Number)
          {
              try
              {
                  //International format as per Email from MTN (RDV created expression) 
                  /*
                  MTN:    27710,27717,27718,27719,2773,2778,2783
                  VC:     27711,27712,27713,27714,27715,27716,2772,2776,2779,2782
                  CellC:  2784,2774
                  8ta:	2781
                  Regular Expression for 07X numbers (International) 277[1-4|6|8-9][0-9]{7}
                  Regular Expression for 08X numbers (International) 278[1-4][0-9]{7}
                  Regular Expression for 07X numbers (International) 07[1-4|6|8-9][0-9]{7}
                  Regular Expression for 08X numbers (International) 08[1-4][0-9]{7}
  				  
                   */
                  string CleanNumber = StripNumber(p_Number);
                  //is it a 07x number International?
                  if (Regex.IsMatch(CleanNumber, @"277[1-4|6|8-9][0-9]{7}") == true)
                  {
                      return true;
                  }
                  //Is it a 08X number International?
                  if (Regex.IsMatch(CleanNumber, @"278[1-4][0-9]{7}") == true)
                  {
                      return true;
                  }
  
  
                  return false;
  
              }
              catch (Exception ex)
              {
  
                  return false;
              }
              finally
              {
  
              }
  
  
          }

  Ruan de Villiers
  UTi Mounties
  MCTS - ASP.net 3.5
  Gtalk - Ruandv@gmail.com
  __________________________________________________________________
  Please Mark as Answered If post is helpful.
  
  • Edited by Gremlin1708 on Jun 28, 2011 05:03 AM