OrderedDictionary Kelas

Definisi

Ruang nama:

System.Collections.Specialized

Rakitan:

System.Collections.Specialized.dll

Sumber:

OrderedDictionary.cs

Mewakili kumpulan pasangan kunci/nilai yang dapat diakses oleh kunci atau indeks.

public ref class OrderedDictionary : System::Collections::IDictionary, System::Collections::Specialized::IOrderedDictionary, System::Runtime::Serialization::IDeserializationCallback, System::Runtime::Serialization::ISerializable

public class OrderedDictionary : System.Collections.IDictionary, System.Collections.Specialized.IOrderedDictionary, System.Runtime.Serialization.IDeserializationCallback, System.Runtime.Serialization.ISerializable

type OrderedDictionary = class
    interface ICollection
    interface IEnumerable
    interface IDictionary
    interface IOrderedDictionary
    interface IDeserializationCallback
    interface ISerializable

Public Class OrderedDictionary
Implements IDeserializationCallback, IDictionary, IOrderedDictionary, ISerializable

Warisan

Object

OrderedDictionary

Turunan

System.Web.Configuration.AdapterDictionary

Penerapan

ICollection IDictionary IEnumerable IOrderedDictionary IDeserializationCallback ISerializable

Contoh

Contoh kode berikut menunjukkan pembuatan, populasi, dan modifikasi OrderedDictionary koleksi, serta dua teknik untuk menampilkan konten OrderedDictionary: satu menggunakan Keys properti dan Values dan yang lain membuat enumerator melalui GetEnumerator metode .

// The following code example enumerates the elements of a OrderedDictionary.
#using <System.dll>

using namespace System;
using namespace System::Collections;
using namespace System::Collections::Specialized;

public ref class OrderedDictionarySample
{
public:
    static void Main()
    {
        // Creates and initializes a OrderedDictionary.
        OrderedDictionary^ myOrderedDictionary = gcnew OrderedDictionary();
        myOrderedDictionary->Add("testKey1", "testValue1");
        myOrderedDictionary->Add("testKey2", "testValue2");
        myOrderedDictionary->Add("keyToDelete", "valueToDelete");
        myOrderedDictionary->Add("testKey3", "testValue3");

        ICollection^ keyCollection = myOrderedDictionary->Keys;
        ICollection^ valueCollection = myOrderedDictionary->Values;

        // Display the contents using the key and value collections
        DisplayContents(keyCollection, valueCollection, myOrderedDictionary->Count);

        // Modifying the OrderedDictionary
        if (!myOrderedDictionary->IsReadOnly)
        {
            // Insert a new key to the beginning of the OrderedDictionary
            myOrderedDictionary->Insert(0, "insertedKey1", "insertedValue1");

            // Modify the value of the entry with the key "testKey2"
            myOrderedDictionary["testKey2"] = "modifiedValue";

            // Remove the last entry from the OrderedDictionary: "testKey3"
            myOrderedDictionary->RemoveAt(myOrderedDictionary->Count - 1);

            // Remove the "keyToDelete" entry, if it exists
            if (myOrderedDictionary->Contains("keyToDelete"))
            {
                myOrderedDictionary->Remove("keyToDelete");
            }
        }

        Console::WriteLine(
            "{0}Displaying the entries of a modified OrderedDictionary.",
            Environment::NewLine);
        DisplayContents(keyCollection, valueCollection, myOrderedDictionary->Count);

        // Clear the OrderedDictionary and add new values
        myOrderedDictionary->Clear();
        myOrderedDictionary->Add("newKey1", "newValue1");
        myOrderedDictionary->Add("newKey2", "newValue2");
        myOrderedDictionary->Add("newKey3", "newValue3");

        // Display the contents of the "new" Dictionary using an enumerator
        IDictionaryEnumerator^ myEnumerator =
            myOrderedDictionary->GetEnumerator();

        Console::WriteLine(
            "{0}Displaying the entries of a \"new\" OrderedDictionary.",
            Environment::NewLine);

        DisplayEnumerator(myEnumerator);
    }

    // Displays the contents of the OrderedDictionary from its keys and values
    static void DisplayContents(
        ICollection^ keyCollection, ICollection^ valueCollection, int dictionarySize)
    {
        array<String^>^ myKeys = gcnew array<String^>(dictionarySize);
        array<String^>^ myValues = gcnew array<String^>(dictionarySize);
        keyCollection->CopyTo(myKeys, 0);
        valueCollection->CopyTo(myValues, 0);

        // Displays the contents of the OrderedDictionary
        Console::WriteLine("   INDEX KEY                       VALUE");
        for (int i = 0; i < dictionarySize; i++)
        {
            Console::WriteLine("   {0,-5} {1,-25} {2}",
                i, myKeys[i], myValues[i]);
        }
        Console::WriteLine();
    }

    // Displays the contents of the OrderedDictionary using its enumerator
    static void DisplayEnumerator(IDictionaryEnumerator^ myEnumerator)
    {
        Console::WriteLine("   KEY                       VALUE");
        while (myEnumerator->MoveNext())
        {
            Console::WriteLine("   {0,-25} {1}",
                myEnumerator->Key, myEnumerator->Value);
        }
    }
};

int main()
{
    OrderedDictionarySample::Main();
}

/*
This code produces the following output.

   INDEX KEY                       VALUE
   0     testKey1                  testValue1
   1     testKey2                  testValue2
   2     keyToDelete               valueToDelete
   3     testKey3                  testValue3


Displaying the entries of a modified OrderedDictionary.
   INDEX KEY                       VALUE
   0     insertedKey1              insertedValue1
   1     testKey1                  testValue1
   2     testKey2                  modifiedValue


Displaying the entries of a "new" OrderedDictionary.
   KEY                       VALUE
   newKey1                   newValue1
   newKey2                   newValue2
   newKey3                   newValue3

*/

// The following code example enumerates the elements of a OrderedDictionary.
using System;
using System.Collections;
using System.Collections.Specialized;

public class OrderedDictionarySample
{
    public static void Main()
    {

        // Creates and initializes a OrderedDictionary.
        OrderedDictionary myOrderedDictionary = new OrderedDictionary();
        myOrderedDictionary.Add("testKey1", "testValue1");
        myOrderedDictionary.Add("testKey2", "testValue2");
        myOrderedDictionary.Add("keyToDelete", "valueToDelete");
        myOrderedDictionary.Add("testKey3", "testValue3");

        ICollection keyCollection = myOrderedDictionary.Keys;
        ICollection valueCollection = myOrderedDictionary.Values;

        // Display the contents using the key and value collections
        DisplayContents(keyCollection, valueCollection, myOrderedDictionary.Count);

        // Modifying the OrderedDictionary
        if (!myOrderedDictionary.IsReadOnly)
        {
            // Insert a new key to the beginning of the OrderedDictionary
            myOrderedDictionary.Insert(0, "insertedKey1", "insertedValue1");

            // Modify the value of the entry with the key "testKey2"
            myOrderedDictionary["testKey2"] = "modifiedValue";

            // Remove the last entry from the OrderedDictionary: "testKey3"
            myOrderedDictionary.RemoveAt(myOrderedDictionary.Count - 1);

            // Remove the "keyToDelete" entry, if it exists
            if (myOrderedDictionary.Contains("keyToDelete"))
            {
                myOrderedDictionary.Remove("keyToDelete");
            }
        }

        Console.WriteLine(
            "{0}Displaying the entries of a modified OrderedDictionary.",
            Environment.NewLine);
        DisplayContents(keyCollection, valueCollection, myOrderedDictionary.Count);

        // Clear the OrderedDictionary and add new values
        myOrderedDictionary.Clear();
        myOrderedDictionary.Add("newKey1", "newValue1");
        myOrderedDictionary.Add("newKey2", "newValue2");
        myOrderedDictionary.Add("newKey3", "newValue3");

        // Display the contents of the "new" Dictionary using an enumerator
        IDictionaryEnumerator myEnumerator =
            myOrderedDictionary.GetEnumerator();

        Console.WriteLine(
            "{0}Displaying the entries of a \"new\" OrderedDictionary.",
            Environment.NewLine);

        DisplayEnumerator(myEnumerator);
    }

    // Displays the contents of the OrderedDictionary from its keys and values
    public static void DisplayContents(
        ICollection keyCollection, ICollection valueCollection, int dictionarySize)
    {
        String[] myKeys = new String[dictionarySize];
        String[] myValues = new String[dictionarySize];
        keyCollection.CopyTo(myKeys, 0);
        valueCollection.CopyTo(myValues, 0);

        // Displays the contents of the OrderedDictionary
        Console.WriteLine("   INDEX KEY                       VALUE");
        for (int i = 0; i < dictionarySize; i++)
        {
            Console.WriteLine("   {0,-5} {1,-25} {2}",
                i, myKeys[i], myValues[i]);
        }
        Console.WriteLine();
    }

    // Displays the contents of the OrderedDictionary using its enumerator
    public static void DisplayEnumerator(IDictionaryEnumerator myEnumerator)
    {
        Console.WriteLine("   KEY                       VALUE");
        while (myEnumerator.MoveNext())
        {
            Console.WriteLine("   {0,-25} {1}",
                myEnumerator.Key, myEnumerator.Value);
        }
    }
}

/*
This code produces the following output.

   INDEX KEY                       VALUE
   0     testKey1                  testValue1
   1     testKey2                  testValue2
   2     keyToDelete               valueToDelete
   3     testKey3                  testValue3


Displaying the entries of a modified OrderedDictionary.
   INDEX KEY                       VALUE
   0     insertedKey1              insertedValue1
   1     testKey1                  testValue1
   2     testKey2                  modifiedValue


Displaying the entries of a "new" OrderedDictionary.
   KEY                       VALUE
   newKey1                   newValue1
   newKey2                   newValue2
   newKey3                   newValue3

*/

' The following code example enumerates the elements of a OrderedDictionary.
Imports System.Collections
Imports System.Collections.Specialized

Public Class OrderedDictionarySample

    Public Shared Sub Main()

        ' Creates and initializes a OrderedDictionary.
        Dim myOrderedDictionary As New OrderedDictionary()
        myOrderedDictionary.Add("testKey1", "testValue1")
        myOrderedDictionary.Add("testKey2", "testValue2")
        myOrderedDictionary.Add("keyToDelete", "valueToDelete")
        myOrderedDictionary.Add("testKey3", "testValue3")

        Dim keyCollection As ICollection = myOrderedDictionary.Keys
        Dim valueCollection As ICollection = myOrderedDictionary.Values

        ' Display the contents Imports the key and value collections
        DisplayContents( _
            keyCollection, valueCollection, myOrderedDictionary.Count)

        ' Modifying the OrderedDictionary
        If Not myOrderedDictionary.IsReadOnly Then

            ' Insert a new key to the beginning of the OrderedDictionary
            myOrderedDictionary.Insert(0, "insertedKey1", "insertedValue1")

            ' Modify the value of the entry with the key "testKey2"
            myOrderedDictionary("testKey2") = "modifiedValue"

            ' Remove the last entry from the OrderedDictionary: "testKey3"
            myOrderedDictionary.RemoveAt(myOrderedDictionary.Count - 1)

            ' Remove the "keyToDelete" entry, if it exists
            If (myOrderedDictionary.Contains("keyToDelete")) Then
                myOrderedDictionary.Remove("keyToDelete")
            End If
        End If

        Console.WriteLine( _
            "{0}Displaying the entries of a modified OrderedDictionary.", _
            Environment.NewLine)
        DisplayContents( _
            keyCollection, valueCollection, myOrderedDictionary.Count)

        ' Clear the OrderedDictionary and add new values
        myOrderedDictionary.Clear()
        myOrderedDictionary.Add("newKey1", "newValue1")
        myOrderedDictionary.Add("newKey2", "newValue2")
        myOrderedDictionary.Add("newKey3", "newValue3")

        ' Display the contents of the "new" Dictionary Imports an enumerator
        Dim myEnumerator As IDictionaryEnumerator = _
            myOrderedDictionary.GetEnumerator()

        Console.WriteLine( _
            "{0}Displaying the entries of a 'new' OrderedDictionary.", _
            Environment.NewLine)

        DisplayEnumerator(myEnumerator)
    End Sub

    ' Displays the contents of the OrderedDictionary from its keys and values
    Public Shared Sub DisplayContents( _
        ByVal keyCollection As ICollection, _
        ByVal valueCollection As ICollection, ByVal dictionarySize As Integer)

        Dim myKeys(dictionarySize) As [String]
        Dim myValues(dictionarySize) As [String]
        keyCollection.CopyTo(myKeys, 0)
        valueCollection.CopyTo(myValues, 0)

        ' Displays the contents of the OrderedDictionary
        Console.WriteLine("   INDEX KEY                       VALUE")
        Dim i As Integer
        For i = 0 To dictionarySize - 1
            Console.WriteLine("   {0,-5} {1,-25} {2}", _
                 i, myKeys(i), myValues(i))
        Next i
        Console.WriteLine()
    End Sub

    ' Displays the contents of the OrderedDictionary using its enumerator
    Public Shared Sub DisplayEnumerator( _
        ByVal myEnumerator As IDictionaryEnumerator)

        Console.WriteLine("   KEY                       VALUE")
        While myEnumerator.MoveNext()
            Console.WriteLine("   {0,-25} {1}", _
                myEnumerator.Key, myEnumerator.Value)
        End While
    End Sub
End Class

'This code produces the following output.
'
'   INDEX KEY                       VALUE
'0:              testKey1(testValue1)
'1:              testKey2(testValue2)
'2:              keyToDelete(valueToDelete)
'3:              testKey3(testValue3)
'
'
'Displaying the entries of a modified OrderedDictionary.
'   INDEX KEY                       VALUE
'0:              insertedKey1(insertedValue1)
'1:              testKey1(testValue1)
'2:              testKey2(modifiedValue)
'
'
'Displaying the entries of a "new" OrderedDictionary.
'                KEY(VALUE)
'                newKey1(newValue1)
'                newKey2(newValue2)
'                newKey3(newValue3)

Keterangan

Setiap elemen adalah pasangan kunci/nilai yang DictionaryEntry disimpan dalam objek . Kunci tidak boleh null, tetapi nilainya bisa.

Elemen tidak OrderedDictionary diurutkan berdasarkan kunci, tidak seperti elemen SortedDictionary<TKey,TValue> kelas. Anda dapat mengakses elemen baik dengan kunci atau indeks.

Pernyataan foreach bahasa C# (For Each dalam Visual Basic) mengembalikan objek yang merupakan jenis setiap elemen dalam koleksi. Karena setiap elemen OrderedDictionary koleksi adalah pasangan kunci/nilai, jenis elemen bukan jenis kunci atau jenis nilai. Sebaliknya, jenis elemennya adalah DictionaryEntry. Kode berikut menunjukkan sintaks C#, Visual Basic, dan C++.

for each (DictionaryEntry de in myOrderedDictionary)
{
    //...
}

foreach (DictionaryEntry de in myOrderedDictionary)
{
    //...
}

For Each de As DictionaryEntry In myOrderedDictionary
    '...
Next de

Pernyataan tersebut foreach adalah pembungkus di sekitar enumerator, yang hanya memungkinkan membaca dari, tidak menulis ke, koleksi.

Konstruktor

OrderedDictionary()	Menginisialisasi instans baru kelas OrderedDictionary.
OrderedDictionary(IEqualityComparer)	Menginisialisasi instans OrderedDictionary baru kelas menggunakan pembanding yang ditentukan.
OrderedDictionary(Int32)	Menginisialisasi instans OrderedDictionary baru kelas menggunakan kapasitas awal yang ditentukan.
OrderedDictionary(Int32, IEqualityComparer)	Menginisialisasi instans OrderedDictionary baru kelas menggunakan kapasitas awal dan pembanding yang ditentukan.
OrderedDictionary(SerializationInfo, StreamingContext)	Kedaluwarsa. Menginisialisasi instans OrderedDictionary baru kelas yang dapat diserialisasikan menggunakan objek dan StreamingContext yang ditentukanSerializationInfo.

Properti

Count	Mendapatkan jumlah pasangan kunci/nilai yang terkandung dalam OrderedDictionary koleksi.
IsReadOnly	Mendapatkan nilai yang menunjukkan apakah OrderedDictionary koleksi bersifat baca-saja.
Item[Int32]	Mendapatkan atau menetapkan nilai pada indeks yang ditentukan.
Item[Object]	Mendapatkan atau mengatur nilai dengan kunci yang ditentukan.
Keys	Mendapatkan objek yang ICollection berisi kunci dalam OrderedDictionary koleksi.
Values	Mendapatkan objek yang ICollection berisi nilai dalam OrderedDictionary koleksi.

Metode

Add(Object, Object)	Menambahkan entri dengan kunci dan nilai yang ditentukan ke OrderedDictionary dalam koleksi dengan indeks terendah yang tersedia.
AsReadOnly()	Mengembalikan salinan baca-saja dari koleksi saat ini OrderedDictionary .
Clear()	Menghapus semua elemen dari OrderedDictionary koleksi.
Contains(Object)	Menentukan apakah OrderedDictionary koleksi berisi kunci tertentu.
CopyTo(Array, Int32)	OrderedDictionary Menyalin elemen ke objek satu dimensi Array pada indeks yang ditentukan.
Equals(Object)	Menentukan apakah objek yang ditentukan sama dengan objek saat ini. (Diperoleh dari Object)
GetEnumerator()	Mengembalikan IDictionaryEnumerator objek yang berulang melalui OrderedDictionary koleksi.
GetHashCode()	Berfungsi sebagai fungsi hash default. (Diperoleh dari Object)
GetObjectData(SerializationInfo, StreamingContext)	Kedaluwarsa. ISerializable Mengimplementasikan antarmuka dan mengembalikan data yang diperlukan untuk membuat serialisasi OrderedDictionary koleksi.
GetType()	Mendapatkan dari instans Type saat ini. (Diperoleh dari Object)
Insert(Int32, Object, Object)	Menyisipkan entri baru ke OrderedDictionary dalam koleksi dengan kunci dan nilai yang ditentukan pada indeks yang ditentukan.
MemberwiseClone()	Membuat salinan dangkal dari saat ini Object. (Diperoleh dari Object)
OnDeserialization(Object)	ISerializable Mengimplementasikan antarmuka dan dipanggil kembali oleh peristiwa deserialisasi ketika deserialisasi selesai.
Remove(Object)	Menghapus entri dengan kunci yang ditentukan dari OrderedDictionary koleksi.
RemoveAt(Int32)	Menghapus entri pada indeks yang ditentukan dari OrderedDictionary koleksi.
ToString()	Mengembalikan string yang mewakili objek saat ini. (Diperoleh dari Object)

Implementasi Antarmuka Eksplisit

ICollection.IsSynchronized	Mendapatkan nilai yang menunjukkan apakah akses ke objek disinkronkan OrderedDictionary (thread-safe).
ICollection.SyncRoot	Mendapatkan objek yang dapat digunakan untuk menyinkronkan akses ke OrderedDictionary objek.
IDeserializationCallback.OnDeserialization(Object)	ISerializable Mengimplementasikan antarmuka dan dipanggil kembali oleh peristiwa deserialisasi ketika deserialisasi selesai.
IDictionary.IsFixedSize	Mendapatkan nilai yang menunjukkan apakah OrderedDictionary memiliki ukuran tetap.
IEnumerable.GetEnumerator()	Mengembalikan IDictionaryEnumerator objek yang berulang melalui OrderedDictionary koleksi.

Metode Ekstensi

Cast<TResult>(IEnumerable)	Mentransmisikan elemen dari ke IEnumerable jenis yang ditentukan.
OfType<TResult>(IEnumerable)	Memfilter elemen berdasarkan IEnumerable jenis yang ditentukan.
AsParallel(IEnumerable)	Mengaktifkan paralelisasi kueri.
AsQueryable(IEnumerable)	Mengonversi menjadi IEnumerableIQueryable.