SortKey.Compare(SortKey, SortKey) 方法

定义

命名空间:

System.Globalization

程序集:

System.Runtime.dll

Source:

SortKey.cs

比较两个排序关键字。

public:
 static int Compare(System::Globalization::SortKey ^ sortkey1, System::Globalization::SortKey ^ sortkey2);

public static int Compare (System.Globalization.SortKey sortkey1, System.Globalization.SortKey sortkey2);

static member Compare : System.Globalization.SortKey * System.Globalization.SortKey -> int

Public Shared Function Compare (sortkey1 As SortKey, sortkey2 As SortKey) As Integer

参数

sortkey1

SortKey

将比较的第一个排序关键字。

sortkey2

SortKey

将比较的第二个排序关键字。

返回

Int32

一个带符号整数，指示 sortkey1 和 sortkey2 之间的关系。

“值”	条件
小于零	sortkey1 小于 sortkey2。
零	sortkey1 等于 sortkey2。
大于零	sortkey1 大于 sortkey2。

例外

ArgumentNullException

sortkey1 或 sortkey2 为 null。

示例

下面的代码示例使用 Compare 方法和等效 CompareInfo.Compare(String, String, CompareOptions) 方法比较两个字符串。

// This code example demonstrates the CompareInfo.Compare() and
// SortKey.Compare() methods.

using System;
using System.Globalization;

class Sample
{
    public static void Main()
    {
    string lowerABC = "abc";
    string upperABC = "ABC";
    int result = 0;

// Create a CompareInfo object for the en-US culture.
    Console.WriteLine("\nCreate a CompareInfo object for the en-US culture...\n");
    CompareInfo cmpi = CompareInfo.GetCompareInfo("en-US");
// Alternatively:
//  CompareInfo cmpi = new CultureInfo("en-US").CompareInfo;

// Create sort keys for lowercase and uppercase "abc", the en-US culture, and
// ignore case.
    SortKey sk1LowerIgnCase = cmpi.GetSortKey(lowerABC, CompareOptions.IgnoreCase);
    SortKey sk2UpperIgnCase = cmpi.GetSortKey(upperABC, CompareOptions.IgnoreCase);

// Create sort keys for lowercase and uppercase "abc", the en-US culture, and
// use case.
    SortKey sk1LowerUseCase = cmpi.GetSortKey(lowerABC, CompareOptions.None);
    SortKey sk2UpperUseCase = cmpi.GetSortKey(upperABC, CompareOptions.None);

// Compare lowercase and uppercase "abc", ignoring case and using CompareInfo.
    result = cmpi.Compare(lowerABC, upperABC, CompareOptions.IgnoreCase);
    Display(result, "CompareInfo, Ignore case", lowerABC, upperABC);
// Compare lowercase and uppercase "abc", ignoring case and using SortKey.
    result = SortKey.Compare(sk1LowerIgnCase, sk2UpperIgnCase);
    Display(result, "SortKey, Ignore case", lowerABC, upperABC);
    Console.WriteLine();

// Compare lowercase and uppercase "abc", using case and using CompareInfo.
    result = cmpi.Compare(lowerABC, upperABC, CompareOptions.None);
    Display(result, "CompareInfo, Use case", lowerABC, upperABC);
// Compare lowercase and uppercase "abc", using case and using SortKey.
    result = SortKey.Compare(sk1LowerUseCase, sk2UpperUseCase);
    Display(result, "SortKey, Use case", lowerABC, upperABC);
    }

// Display the results of a comparison.
    private static void Display(int compareResult, string title,
                                string lower, string upper)
    {
    string lessThan    = "less than ";
    string equalTo     = "equal to ";
    string greaterThan = "greater than ";
    string resultPhrase = null;
    string format = "{0}:\n    \"{1}\" is {2}\"{3}\".";

    if      (compareResult < 0) resultPhrase = lessThan;
    else if (compareResult > 0) resultPhrase = greaterThan;
    else                        resultPhrase = equalTo;
    Console.WriteLine(format, title, lower, resultPhrase, upper);
    }
}
/*
This code example produces the following results:

Create a CompareInfo object for the en-US culture...

CompareInfo, Ignore case:
    "abc" is equal to "ABC".
SortKey, Ignore case:
    "abc" is equal to "ABC".

CompareInfo, Use case:
    "abc" is less than "ABC".
SortKey, Use case:
    "abc" is less than "ABC".

*/

' This code example demonstrates the CompareInfo.Compare() and
' SortKey.Compare() methods.

Imports System.Globalization

Class Sample
    Public Shared Sub Main() 
        Dim lowerABC As String = "abc"
        Dim upperABC As String = "ABC"
        Dim result As Integer = 0
        
    ' Create a CompareInfo object for the en-US culture.
        Console.WriteLine(vbCrLf & _
                          "Create a CompareInfo object for the en-US culture..." & _
                          vbCrLf)
        Dim cmpi As CompareInfo = CompareInfo.GetCompareInfo("en-US")
    ' Alternatively:
    '   Dim cmpi As CompareInfo = New CultureInfo("en-US").CompareInfo

    ' Create sort keys for lowercase and uppercase "abc", the en-US culture, and 
    ' ignore case. 
        Dim sk1LowerIgnCase As SortKey = cmpi.GetSortKey(lowerABC, CompareOptions.IgnoreCase)
        Dim sk2UpperIgnCase As SortKey = cmpi.GetSortKey(upperABC, CompareOptions.IgnoreCase)
        
    ' Create sort keys for lowercase and uppercase "abc", the en-US culture, and 
    ' use case. 
        Dim sk1LowerUseCase As SortKey = cmpi.GetSortKey(lowerABC, CompareOptions.None)
        Dim sk2UpperUseCase As SortKey = cmpi.GetSortKey(upperABC, CompareOptions.None)
        
    ' Compare lowercase and uppercase "abc", ignoring case and using CompareInfo.
        result = cmpi.Compare(lowerABC, upperABC, CompareOptions.IgnoreCase)
        Display(result, "CompareInfo, Ignore case", lowerABC, upperABC)
    ' Compare lowercase and uppercase "abc", ignoring case and using SortKey.
        result = SortKey.Compare(sk1LowerIgnCase, sk2UpperIgnCase)
        Display(result, "SortKey, Ignore case", lowerABC, upperABC)
        Console.WriteLine()
        
    ' Compare lowercase and uppercase "abc", using case and using CompareInfo.
        result = cmpi.Compare(lowerABC, upperABC, CompareOptions.None)
        Display(result, "CompareInfo, Use case", lowerABC, upperABC)
    ' Compare lowercase and uppercase "abc", using case and using SortKey.
        result = SortKey.Compare(sk1LowerUseCase, sk2UpperUseCase)
        Display(result, "SortKey, Use case", lowerABC, upperABC)
    End Sub
    
    ' Display the results of a comparison.
    Private Shared Sub Display(ByVal compareResult As Integer, _
                               ByVal title As String, _
                               ByVal lower As String, _
                               ByVal upper As String) 
        Dim lessThan As String = "less than "
        Dim equalTo As String = "equal to "
        Dim greaterThan As String = "greater than "
        Dim resultPhrase As String = Nothing
        Dim format As String = "{0}:" & vbCrLf & "    ""{1}"" is {2}""{3}""."
        
        If compareResult < 0 Then
            resultPhrase = lessThan
        ElseIf compareResult > 0 Then
            resultPhrase = greaterThan
        Else
            resultPhrase = equalTo
        End If
        Console.WriteLine(format, title, lower, resultPhrase, upper)
    End Sub
End Class

'
'This code example produces the following results:
'
'Create a CompareInfo object for the en-US culture...
'
'CompareInfo, Ignore case:
'    "abc" is equal to "ABC".
'SortKey, Ignore case:
'    "abc" is equal to "ABC".
'
'CompareInfo, Use case:
'    "abc" is less than "ABC".
'SortKey, Use case:
'    "abc" is less than "ABC".
'

注解

方法Compare比较 KeyData 和 sortkey2 参数的属性sortkey1。 方法生成与 方法相同的结果 CompareInfo.Compare 。

有关 方法和排序键比较的详细信息 Compare ，请参阅 SortKey 类主题。