String.CompareOrdinal Method (String, String)

This method performs a case-sensitive comparison using ordinal sort rules. For more information about word, string, and ordinal sorts, see System.Globalization.CompareOptions. To perform a case-insensitive comparison using ordinal sort rules, call the Compare(String, String, StringComparison) method with a StringComparison value of OrdinalIgnoreCase.

Because CompareOrdinal(String, String) is a static method, strA and strB can be Nothing. If both values are Nothing, the method returns 0 (zero), which indicates that strA and strB are equal. If only one of the values is Nothing, the method considers the non-null value to be greater.

The following example performs and ordinal comparison of two strings that only differ in case.

' Sample for String.CompareOrdinal(String, String) 
Imports System
Imports Microsoft.VisualBasic

Class Sample
   Public Shared Sub Main()
      Dim str1 As [String] = "ABCD" 
      Dim str2 As [String] = "abcd" 
      Dim str As [String]
      Dim result As Integer

      Console.WriteLine()
      Console.WriteLine("Compare the numeric values of the corresponding Char objects in each string.")
      Console.WriteLine("str1 = '{0}', str2 = '{1}'", str1, str2)
      result = [String].CompareOrdinal(str1, str2)
      str = IIf(result < 0, "less than", IIf(result > 0, "greater than", "equal to"))
      Console.Write("String '{0}' is ", str1)
      Console.Write("{0} ", str)
      Console.WriteLine("String '{0}'.", str2)
   End Sub 'Main
End Class 'Sample
' 
'This example produces the following results: 
' 
'Compare the numeric values of the corresponding Char objects in each string. 
'str1 = 'ABCD', str2 = 'abcd' 
'String 'ABCD' is less than String 'abcd'. 
'

.NET Framework

.NET Framework Client Profile

Portable Class Library

.NET for Windows Store apps

Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Reference