CaseInsensitiveHashCodeProvider Kelas

Definisi

Ruang nama:

System.Collections

Rakitan:

System.Collections.NonGeneric.dll

Sumber:

CaseInsensitiveHashCodeProvider.cs

Perhatian

CaseInsensitiveHashCodeProvider has been deprecated. Use StringComparer instead.

Memasok kode hash untuk objek, menggunakan algoritma hashing yang mengabaikan kasus string.

public ref class CaseInsensitiveHashCodeProvider : System::Collections::IHashCodeProvider

[System.Obsolete("CaseInsensitiveHashCodeProvider has been deprecated. Use StringComparer instead.")]
public class CaseInsensitiveHashCodeProvider : System.Collections.IHashCodeProvider

[<System.Obsolete("CaseInsensitiveHashCodeProvider has been deprecated. Use StringComparer instead.")>]
type CaseInsensitiveHashCodeProvider = class
    interface IHashCodeProvider

Public Class CaseInsensitiveHashCodeProvider
Implements IHashCodeProvider

Warisan

Object

CaseInsensitiveHashCodeProvider

Atribut

ObsoleteAttribute

Penerapan

IHashCodeProvider

Contoh

Contoh kode berikut membuat tabel hash peka huruf besar/kecil dan tabel hash yang tidak peka huruf besar/kecil dan menunjukkan perbedaan perilakunya, bahkan jika keduanya berisi elemen yang sama.

using namespace System;
using namespace System::Collections;
using namespace System::Globalization;
int main()
{
   
   // Create a Hashtable using the default hash code provider and the default comparer.
   Hashtable^ myHT1 = gcnew Hashtable;
   myHT1->Add( "FIRST", "Hello" );
   myHT1->Add( "SECOND", "World" );
   myHT1->Add( "THIRD", "!" );
   
   // Create a Hashtable using a case-insensitive code provider and a case-insensitive comparer,
   // based on the culture of the current thread.
   Hashtable^ myHT2 = gcnew Hashtable( gcnew CaseInsensitiveHashCodeProvider,gcnew CaseInsensitiveComparer );
   myHT2->Add( "FIRST", "Hello" );
   myHT2->Add( "SECOND", "World" );
   myHT2->Add( "THIRD", "!" );
   
   // Create a Hashtable using a case-insensitive code provider and a case-insensitive comparer,
   // based on the InvariantCulture.
   Hashtable^ myHT3 = gcnew Hashtable( CaseInsensitiveHashCodeProvider::DefaultInvariant,CaseInsensitiveComparer::DefaultInvariant );
   myHT3->Add( "FIRST", "Hello" );
   myHT3->Add( "SECOND", "World" );
   myHT3->Add( "THIRD", "!" );
   
   // Create a Hashtable using a case-insensitive code provider and a case-insensitive comparer,
   // based on the Turkish culture (tr-TR), where "I" is not the uppercase version of "i".
   CultureInfo^ myCul = gcnew CultureInfo( "tr-TR" );
   Hashtable^ myHT4 = gcnew Hashtable( gcnew CaseInsensitiveHashCodeProvider( myCul ),gcnew CaseInsensitiveComparer( myCul ) );
   myHT4->Add( "FIRST", "Hello" );
   myHT4->Add( "SECOND", "World" );
   myHT4->Add( "THIRD", "!" );
   
   // Search for a key in each hashtable.
   Console::WriteLine( "first is in myHT1: {0}", myHT1->ContainsKey( "first" ) );
   Console::WriteLine( "first is in myHT2: {0}", myHT2->ContainsKey( "first" ) );
   Console::WriteLine( "first is in myHT3: {0}", myHT3->ContainsKey( "first" ) );
   Console::WriteLine( "first is in myHT4: {0}", myHT4->ContainsKey( "first" ) );
}

/* 
This code produces the following output.  Results vary depending on the system's culture settings.

first is in myHT1: False
first is in myHT2: True
first is in myHT3: True
first is in myHT4: False

*/

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

public class SamplesHashtable  {

   public static void Main()  {

      // Create a Hashtable using the default hash code provider and the default comparer.
      Hashtable myHT1 = new Hashtable();
      myHT1.Add("FIRST", "Hello");
      myHT1.Add("SECOND", "World");
      myHT1.Add("THIRD", "!");

      // Create a Hashtable using a case-insensitive code provider and a case-insensitive comparer,
      // based on the culture of the current thread.
      Hashtable myHT2 = new Hashtable( new CaseInsensitiveHashCodeProvider(), new CaseInsensitiveComparer() );
      myHT2.Add("FIRST", "Hello");
      myHT2.Add("SECOND", "World");
      myHT2.Add("THIRD", "!");

      // Create a Hashtable using a case-insensitive code provider and a case-insensitive comparer,
      // based on the InvariantCulture.
      Hashtable myHT3 = new Hashtable( CaseInsensitiveHashCodeProvider.DefaultInvariant, CaseInsensitiveComparer.DefaultInvariant );
      myHT3.Add("FIRST", "Hello");
      myHT3.Add("SECOND", "World");
      myHT3.Add("THIRD", "!");

      // Create a Hashtable using a case-insensitive code provider and a case-insensitive comparer,
      // based on the Turkish culture (tr-TR), where "I" is not the uppercase version of "i".
      CultureInfo myCul = new CultureInfo( "tr-TR" );
      Hashtable myHT4 = new Hashtable( new CaseInsensitiveHashCodeProvider( myCul ), new CaseInsensitiveComparer( myCul ) );
      myHT4.Add("FIRST", "Hello");
      myHT4.Add("SECOND", "World");
      myHT4.Add("THIRD", "!");

      // Search for a key in each hashtable.
      Console.WriteLine( "first is in myHT1: {0}", myHT1.ContainsKey( "first" ) );
      Console.WriteLine( "first is in myHT2: {0}", myHT2.ContainsKey( "first" ) );
      Console.WriteLine( "first is in myHT3: {0}", myHT3.ContainsKey( "first" ) );
      Console.WriteLine( "first is in myHT4: {0}", myHT4.ContainsKey( "first" ) );
   }
}


/*
This code produces the following output.  Results vary depending on the system's culture settings.

first is in myHT1: False
first is in myHT2: True
first is in myHT3: True
first is in myHT4: False

*/

Imports System.Collections
Imports System.Globalization

Public Class SamplesHashtable

   Public Shared Sub Main()

      ' Create a Hashtable using the default hash code provider and the default comparer.
      Dim myHT1 As New Hashtable()
      myHT1.Add("FIRST", "Hello")
      myHT1.Add("SECOND", "World")
      myHT1.Add("THIRD", "!")

      ' Create a Hashtable using a case-insensitive code provider and a case-insensitive comparer,
      ' based on the culture of the current thread.
      Dim myHT2 As New Hashtable(New CaseInsensitiveHashCodeProvider(), New CaseInsensitiveComparer())
      myHT2.Add("FIRST", "Hello")
      myHT2.Add("SECOND", "World")
      myHT2.Add("THIRD", "!")

      ' Create a Hashtable using a case-insensitive code provider and a case-insensitive comparer,
      ' based on the InvariantCulture.
      Dim myHT3 As New Hashtable(CaseInsensitiveHashCodeProvider.DefaultInvariant, CaseInsensitiveComparer.DefaultInvariant)
      myHT3.Add("FIRST", "Hello")
      myHT3.Add("SECOND", "World")
      myHT3.Add("THIRD", "!")

      ' Create a Hashtable using a case-insensitive code provider and a case-insensitive comparer,
      ' based on the Turkish culture (tr-TR), where "I" is not the uppercase version of "i".
      Dim myCul As New CultureInfo("tr-TR")
      Dim myHT4 As New Hashtable(New CaseInsensitiveHashCodeProvider(myCul), New CaseInsensitiveComparer(myCul))
      myHT4.Add("FIRST", "Hello")
      myHT4.Add("SECOND", "World")
      myHT4.Add("THIRD", "!")

      ' Search for a key in each hashtable.
      Console.WriteLine("first is in myHT1: {0}", myHT1.ContainsKey("first"))
      Console.WriteLine("first is in myHT2: {0}", myHT2.ContainsKey("first"))
      Console.WriteLine("first is in myHT3: {0}", myHT3.ContainsKey("first"))
      Console.WriteLine("first is in myHT4: {0}", myHT4.ContainsKey("first"))

   End Sub

End Class


'This code produces the following output.  Results vary depending on the system's culture settings.
'
'first is in myHT1: False
'first is in myHT2: True
'first is in myHT3: True
'first is in myHT4: False

Keterangan

CaseInsensitiveHashCodeProvider mengimplementasikan antarmuka yang mendukung perbandingan IHashCodeProvider tidak sensitif huruf besar/kecil pada string, sama seperti CaseInsensitiveComparer mengimplementasikan antarmuka yang mendukung perbandingan IComparer tidak sensitif huruf besar/kecil pada string.

Penting

Kami tidak menyarankan Anda menggunakan CaseInsensitiveHashCodeProvider kelas untuk pengembangan baru. Sebagai gantinya, kami sarankan Anda menggunakan objek yang System.StringComparer dikembalikan oleh StringComparer.CurrentCultureIgnoreCaseproperti , StringComparer.InvariantCultureIgnoreCase, atau StringComparer.OrdinalIgnoreCase .

Objek yang digunakan sebagai kunci oleh diperlukan Hashtable untuk mengambil Object.GetHashCode alih metode (atau IHashCodeProvider antarmuka) dan Object.Equals metode (atau IComparer antarmuka). Implementasi kedua metode atau antarmuka harus menangani sensitivitas huruf besar/kecil dengan cara yang sama; jika tidak, Hashtable mungkin bertingkah salah. Misalnya, saat membuat Hashtable, Anda harus menggunakan kelas ini dengan CaseInsensitiveComparer kelas atau implementasi yang tidak peka huruf besar/kecil IComparer .

Konstruktor

CaseInsensitiveHashCodeProvider()	Kedaluwarsa. Menginisialisasi instans CaseInsensitiveHashCodeProvider baru kelas menggunakan CurrentCulture utas saat ini.
CaseInsensitiveHashCodeProvider(CultureInfo)	Kedaluwarsa. Menginisialisasi instans CaseInsensitiveHashCodeProvider baru kelas menggunakan yang ditentukan CultureInfo.

Properti

Default	Kedaluwarsa. Mendapatkan instans CaseInsensitiveHashCodeProvider yang terkait dengan CurrentCulture utas saat ini dan yang selalu tersedia.
DefaultInvariant	Kedaluwarsa. Mendapatkan instans CaseInsensitiveHashCodeProvider yang terkait dengan InvariantCulture dan yang selalu tersedia.

Metode

Equals(Object)	Kedaluwarsa. Menentukan apakah objek yang ditentukan sama dengan objek saat ini. (Diperoleh dari Object)
GetHashCode()	Kedaluwarsa. Berfungsi sebagai fungsi hash default. (Diperoleh dari Object)
GetHashCode(Object)	Kedaluwarsa. Mengembalikan kode hash untuk objek yang diberikan, menggunakan algoritma hashing yang mengabaikan kasus string.
GetType()	Kedaluwarsa. Mendapatkan dari instans Type saat ini. (Diperoleh dari Object)
MemberwiseClone()	Kedaluwarsa. Membuat salinan dangkal dari saat ini Object. (Diperoleh dari Object)
ToString()	Kedaluwarsa. Mengembalikan string yang mewakili objek saat ini. (Diperoleh dari Object)

Lihat juga

• Hashtable
• IHashCodeProvider
• CurrentCulture
• CultureInfo
• CaseInsensitiveComparer
• Melakukan Operasi String Culture-Insensitive dalam Koleksi