Comparer.DefaultInvariant 字段

表示 Comparer 的实例，它与 CultureInfo.InvariantCulture 关联。此字段为只读。

**命名空间:**System.Collections
**程序集:**mscorlib（在 mscorlib.dll 中）

语法

声明
Public Shared ReadOnly DefaultInvariant As Comparer
用法
Dim value As Comparer

value = Comparer.DefaultInvariant

public static readonly Comparer DefaultInvariant

public:
static initonly Comparer^ DefaultInvariant

public static final Comparer DefaultInvariant

public static final var DefaultInvariant : Comparer

备注

比较过程使用 CultureInfo.InvariantCulture 确定排序顺序和大小写规则。根据区域性的不同，字符串比较可能会有不同的结果。有关区域性特定比较的更多信息，请参见 System.Globalization 命名空间和 编码和本地化。

示例

下面的代码示例显示 Compare 是如何根据与 Comparer 关联的区域性返回不同的值的。

Imports System
Imports System.Collections
Imports System.Globalization

Public Class SamplesComparer

   Public Shared Sub Main()

      ' Creates the strings to compare.
      Dim str1 As [String] = "llegar"
      Dim str2 As [String] = "lugar"
      Console.WriteLine("Comparing ""{0}"" and ""{1}"" ...", str1, str2)

      ' Uses the DefaultInvariant Comparer.
      Console.WriteLine("   Invariant Comparer: {0}", Comparer.DefaultInvariant.Compare(str1, str2))

      ' Uses the Comparer based on the culture "es-ES" (Spanish - Spain, international sort).
      Dim myCompIntl As New Comparer(New CultureInfo("es-ES", False))
      Console.WriteLine("   International Sort: {0}", myCompIntl.Compare(str1, str2))

      ' Uses the Comparer based on the culture identifier 0x040A (Spanish - Spain, traditional sort).
      Dim myCompTrad As New Comparer(New CultureInfo(&H40A, False))
      Console.WriteLine("   Traditional Sort  : {0}", myCompTrad.Compare(str1, str2))

   End Sub 'Main 

End Class 'SamplesComparer


'This code produces the following output.
'
'Comparing "llegar" and "lugar" ...
'   Invariant Comparer: -1
'   International Sort: -1
'   Traditional Sort  : 1

using System;
using System.Collections;
using System.Globalization;


public class SamplesComparer  {

   public static void Main()  {

      // Creates the strings to compare.
      String str1 = "llegar";
      String str2 = "lugar";
      Console.WriteLine( "Comparing \"{0}\" and \"{1}\" ...", str1, str2 );

      // Uses the DefaultInvariant Comparer.
      Console.WriteLine( "   Invariant Comparer: {0}", Comparer.DefaultInvariant.Compare( str1, str2 ) );

      // Uses the Comparer based on the culture "es-ES" (Spanish - Spain, international sort).
      Comparer myCompIntl = new Comparer( new CultureInfo( "es-ES", false ) );
      Console.WriteLine( "   International Sort: {0}", myCompIntl.Compare( str1, str2 ) );

      // Uses the Comparer based on the culture identifier 0x040A (Spanish - Spain, traditional sort).
      Comparer myCompTrad = new Comparer( new CultureInfo( 0x040A, false ) );
      Console.WriteLine( "   Traditional Sort  : {0}", myCompTrad.Compare( str1, str2 ) );

   }

}

/*
This code produces the following output.

Comparing "llegar" and "lugar" ...
   Invariant Comparer: -1
   International Sort: -1
   Traditional Sort  : 1

*/

using namespace System;
using namespace System::Collections;
using namespace System::Globalization;
int main()
{
   
   // Creates the strings to compare.
   String^ str1 = "llegar";
   String^ str2 = "lugar";
   Console::WriteLine( "Comparing \"{0}\" and \"{1}\" ...", str1, str2 );
   
   // Uses the DefaultInvariant Comparer.
   Console::WriteLine( "   Invariant Comparer: {0}", Comparer::DefaultInvariant->Compare( str1, str2 ) );
   
   // Uses the Comparer based on the culture "es-ES" (Spanish - Spain, international sort).
   Comparer^ myCompIntl = gcnew Comparer( gcnew CultureInfo(  "es-ES",false ) );
   Console::WriteLine( "   International Sort: {0}", myCompIntl->Compare( str1, str2 ) );
   
   // Uses the Comparer based on the culture identifier 0x040A (Spanish - Spain, traditional sort).
   Comparer^ myCompTrad = gcnew Comparer( gcnew CultureInfo( 0x040A,false ) );
   Console::WriteLine( "   Traditional Sort  : {0}", myCompTrad->Compare( str1, str2 ) );
}

/*
This code produces the following output.

Comparing "llegar" and "lugar" ...
   Invariant Comparer: -1
   International Sort: -1
   Traditional Sort  : 1

*/

import System.* ;
import System.Collections.*;
import System.Globalization.*;

public class SamplesComparer
{
    public static void main(String[] args)
    {
        // Creates the strings to compare.
        String str1 = "llegar";
        String str2 = "lugar";
        Console.WriteLine("Comparing \"{0}\" and \"{1}\" ...", str1, str2);
      
        // Uses the DefaultInvariant Comparer.
        Console.WriteLine("   Invariant Comparer: {0}", 
            (Int32)Comparer.DefaultInvariant.Compare(str1, str2));

        // Uses the Comparer based on the culture "es-ES" (Spanish - Spain, 
        // international sort).
        Comparer myCompIntl = new Comparer(new CultureInfo("es-ES", false));
        Console.WriteLine("   International Sort: {0}", 
            (Int32)myCompIntl.Compare(str1, str2));

        // Uses the Comparer based on the culture identifier 0x040A 
        // (Spanish - Spain, traditional sort).
        Comparer myCompTrad = new Comparer(new CultureInfo(0x40A, false));
        Console.WriteLine("   Traditional Sort  : {0}",
            (Int32)myCompTrad.Compare(str1, str2));
    } //main
} //SamplesComparer

/*
This code produces the following output.

Comparing "llegar" and "lugar" ...
   Invariant Comparer: -1
   International Sort: -1
   Traditional Sort  : 1

*/

平台

Windows 98、Windows 2000 SP4、Windows CE、Windows Millennium Edition、Windows Mobile for Pocket PC、Windows Mobile for Smartphone、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition

.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。

版本信息

.NET Framework

受以下版本支持：2.0、1.1

.NET Compact Framework

受以下版本支持：2.0、1.0

请参见

参考

Comparer 类
Comparer 成员
System.Collections 命名空间
CultureInfo.InvariantCulture
System.Globalization.CompareInfo