IsValidRegularExpression - Checking whether a given regular expression is in valid format [ All Languages » VB.net »  Regular Expression] Total Hit ( 3424) Rate this article:     Poor     Excellent   Submit Your Question/Comment about this article Rating

Click here to copy the following block ' Check whether a given regular expression is in valid format ' Examples: '  Debug.WriteLine(IsValidRegularExpression("^((\(\d{3}\) ' ?)|(\d{3}-))?\d{3}-\d{4}$")) ' => True '  Debug.WriteLine(IsValidRegularExpression("^[|)$")) ' => False Function IsValidRegularExpression(ByVal regex As String) As Boolean   Try     Dim r As New System.Text.RegularExpressions.Regex(regex)     ' if the line above did not throw an exception, the expression is valid     Return True   Catch ex As Exception     Return False   End Try End Function

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