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Posted By

Anthony on 09/02/08


Tagged

email validation RegularExpression


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Email Address Format Validation

Published in: VB.NET 

Uses a regular expression to validate a string as a validly formatted email address.

Plain TextExpand 
  1. ''' <summary>
  2. ''' Determines whether provided email address is properly formatted.
  3. ''' </summary>
  4. ''' <param name="s"></param>
  5. ''' <returns></returns>
  6. ''' <remarks></remarks>
  7. Private Function IsValidEmailFormat(ByVal s As String) As Boolean
  8.     Dim result As Boolean = False
  9.  
  10.     If Not String.IsNullOrEmpty(s) Then
  11.  
  12.         '^[_a-zA-Z0-9-]+(\.[_a-zA-Z0-9-]+)*@[a-zA-Z0-9-]+(\.[a-zA-Z0-9-]+)*\.(([0-9]{1,3})|([a-zA-Z]{2,3})|(aero|coop|info|museum|name))$
  13.         Dim pattern As String = My.Settings.Email_Validation_Pattern
  14.  
  15.         Dim match As RegularExpressions.Match = RegularExpressions.Regex.Match(s, pattern)
  16.         result = match.Success
  17.     End If
  18.  
  19.     Return result
  20. End Function

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