Comparer 类
重要
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比较两个对象是否相等,其中字符串比较是区分大小写的。
public ref class Comparer sealed : System::Collections::IComparer
public ref class Comparer sealed : System::Collections::IComparer, System::Runtime::Serialization::ISerializable
public sealed class Comparer : System.Collections.IComparer
public sealed class Comparer : System.Collections.IComparer, System.Runtime.Serialization.ISerializable
[System.Serializable]
public sealed class Comparer : System.Collections.IComparer, System.Runtime.Serialization.ISerializable
[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public sealed class Comparer : System.Collections.IComparer, System.Runtime.Serialization.ISerializable
type Comparer = class
interface IComparer
type Comparer = class
interface IComparer
interface ISerializable
[<System.Serializable>]
type Comparer = class
interface IComparer
interface ISerializable
[<System.Serializable>]
[<System.Runtime.InteropServices.ComVisible(true)>]
type Comparer = class
interface IComparer
interface ISerializable
Public NotInheritable Class Comparer
Implements IComparer
Public NotInheritable Class Comparer
Implements IComparer, ISerializable
- 继承
-
Comparer
- 属性
- 实现
下面的代码示例演示如何 Compare 根据与 Comparer关联的区域性返回不同的值。
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
*/
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
*/
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
End Class
'This code produces the following output.
'
'Comparing "llegar" and "lugar" ...
' Invariant Comparer: -1
' International Sort: -1
' Traditional Sort : 1
此类是 接口的默认实现 IComparer 。 类 CaseInsensitiveComparer 是接口的实现, IComparer 该接口执行不区分大小写的字符串比较。 System.Collections.Generic.Comparer<T> 是此类的泛型等效项。
除非另行指定,否则比较过程使用 Thread.CurrentCulture 当前线程的 。 字符串比较可能具有不同的结果,具体取决于区域性。 有关特定于区域性的比较的详细信息,请参阅 System.Globalization 命名空间和 全球化和本地化。
Comparer(Culture |
使用指定的 Comparer 初始化 CultureInfo 类的新实例。 |
Default |
表示 Comparer 的实例,它与当前线程的 CurrentCulture 关联。 此字段为只读。 |
Default |
表示 Comparer 的实例,它与 InvariantCulture 关联。 此字段为只读。 |
Compare(Object, Object) |
对同一类型的两个对象执行区分大小写的比较,并返回一个值,指示其中一个对象小于、等于还是大于另一个对象。 |
Equals(Object) |
确定指定对象是否等于当前对象。 (继承自 Object) |
Get |
作为默认哈希函数。 (继承自 Object) |
Get |
已过时.
用序列化所需的数据填充 SerializationInfo 对象。 |
Get |
获取当前实例的 Type。 (继承自 Object) |
Memberwise |
创建当前 Object 的浅表副本。 (继承自 Object) |
To |
返回表示当前对象的字符串。 (继承自 Object) |
产品 | 版本 |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 2.0, 2.1 |
UWP | 10.0 |