SortKey.Compare(SortKey, SortKey) Metoda

Definice

Obor názvů:

System.Globalization

Sestavení:

System.Runtime.dll

Zdroj:

SortKey.cs

Porovná dva klíče řazení.

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

Parametry

sortkey1

SortKey

První klíč řazení, který se má porovnat.

sortkey2

SortKey

Druhý klíč řazení, který se má porovnat.

Návraty

Int32

Celé číslo se znaménkem, které označuje vztah mezi sortkey1 a sortkey2.

Hodnota	Podmínka
Menší než nula	sortkey1 je menší než sortkey2.
Žádnou	sortkey1 se rovná hodnotě sortkey2.
Větší než nula	sortkey1 je větší než sortkey2.

Výjimky

ArgumentNullException

sortkey1 nebo sortkey2 je null.

Příklady

Následující příklad kódu porovnává dva řetězce pomocí Compare metody a ekvivalentní CompareInfo.Compare(String, String, CompareOptions) metody.

// 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".
'

Poznámky

Metoda Compare porovnává KeyData vlastnosti sortkey1 parametrů a sortkey2 . Metoda poskytuje stejné výsledky jako CompareInfo.Compare metoda .

Další informace o Compare metodě a porovnání klíčů řazení najdete v SortKey tématu třídy.