DictionaryBase DictionaryBase DictionaryBase DictionaryBase Class

Definicja

Udostępnia klasę bazową abstract dla jednoznacznie wpisanej kolekcji par klucz/wartość.Provides the abstract base class for a strongly typed collection of key/value pairs.

public ref class DictionaryBase abstract : System::Collections::IDictionary
[System.Runtime.InteropServices.ComVisible(true)]
[System.Serializable]
public abstract class DictionaryBase : System.Collections.IDictionary
type DictionaryBase = class
    interface IDictionary
    interface ICollection
    interface IEnumerable
Public MustInherit Class DictionaryBase
Implements IDictionary
Dziedziczenie
DictionaryBaseDictionaryBaseDictionaryBaseDictionaryBase
Pochodne
Atrybuty
Implementuje

Przykłady

Poniższy przykład kodu implementuje klasę DictionaryBase i używa tej implementacji, aby utworzyć słownik kluczy i wartości String, które mają Length z 5 znaków lub mniej.The following code example implements the DictionaryBase class and uses that implementation to create a dictionary of String keys and values that have a Length of 5 characters or less.

using namespace System;
using namespace System::Collections;

public ref class ShortStringDictionary: public DictionaryBase
{
public:

   property String^ Item [String^]
   {
      String^ get( String^ key )
      {
         return (dynamic_cast<String^>(Dictionary[ key ]));
      }

      void set( String^ value, String^ key )
      {
         Dictionary[ key ] = value;
      }
   }

   property ICollection^ Keys 
   {
      ICollection^ get()
      {
         return (Dictionary->Keys);
      }
   }

   property ICollection^ Values 
   {
      ICollection^ get()
      {
         return (Dictionary->Values);
      }
   }
   void Add( String^ key, String^ value )
   {
      Dictionary->Add( key, value );
   }

   bool Contains( String^ key )
   {
      return (Dictionary->Contains( key ));
   }

   void Remove( String^ key )
   {
      Dictionary->Remove( key );
   }


protected:
   virtual void OnInsert( Object^ key, Object^ value ) override
   {
      if ( key->GetType() != Type::GetType( "System.String" ) )
            throw gcnew ArgumentException( "key must be of type String.","key" );
      else
      {
         String^ strKey = dynamic_cast<String^>(key);
         if ( strKey->Length > 5 )
                  throw gcnew ArgumentException( "key must be no more than 5 characters in length.","key" );
      }

      if ( value->GetType() != Type::GetType( "System.String" ) )
            throw gcnew ArgumentException( "value must be of type String.","value" );
      else
      {
         String^ strValue = dynamic_cast<String^>(value);
         if ( strValue->Length > 5 )
                  throw gcnew ArgumentException( "value must be no more than 5 characters in length.","value" );
      }
   }

   virtual void OnRemove( Object^ key, Object^ /*value*/ ) override
   {
      if ( key->GetType() != Type::GetType( "System.String" ) )
            throw gcnew ArgumentException( "key must be of type String.","key" );
      else
      {
         String^ strKey = dynamic_cast<String^>(key);
         if ( strKey->Length > 5 )
                  throw gcnew ArgumentException( "key must be no more than 5 characters in length.","key" );
      }
   }

   virtual void OnSet( Object^ key, Object^ /*oldValue*/, Object^ newValue ) override
   {
      if ( key->GetType() != Type::GetType( "System.String" ) )
            throw gcnew ArgumentException( "key must be of type String.","key" );
      else
      {
         String^ strKey = dynamic_cast<String^>(key);
         if ( strKey->Length > 5 )
                  throw gcnew ArgumentException( "key must be no more than 5 characters in length.","key" );
      }

      if ( newValue->GetType() != Type::GetType( "System.String" ) )
            throw gcnew ArgumentException( "newValue must be of type String.","newValue" );
      else
      {
         String^ strValue = dynamic_cast<String^>(newValue);
         if ( strValue->Length > 5 )
                  throw gcnew ArgumentException( "newValue must be no more than 5 characters in length.","newValue" );
      }
   }

   virtual void OnValidate( Object^ key, Object^ value ) override
   {
      if ( key->GetType() != Type::GetType( "System.String" ) )
            throw gcnew ArgumentException( "key must be of type String.","key" );
      else
      {
         String^ strKey = dynamic_cast<String^>(key);
         if ( strKey->Length > 5 )
                  throw gcnew ArgumentException( "key must be no more than 5 characters in length.","key" );
      }

      if ( value->GetType() != Type::GetType( "System.String" ) )
            throw gcnew ArgumentException( "value must be of type String.","value" );
      else
      {
         String^ strValue = dynamic_cast<String^>(value);
         if ( strValue->Length > 5 )
                  throw gcnew ArgumentException( "value must be no more than 5 characters in length.","value" );
      }
   }

};

void PrintKeysAndValues2( ShortStringDictionary^ myCol );
void PrintKeysAndValues3( ShortStringDictionary^ myCol );
int main()
{
   // Creates and initializes a new DictionaryBase.
   ShortStringDictionary^ mySSC = gcnew ShortStringDictionary;

   // Adds elements to the collection.
   mySSC->Add( "One", "a" );
   mySSC->Add( "Two", "ab" );
   mySSC->Add( "Three", "abc" );
   mySSC->Add( "Four", "abcd" );
   mySSC->Add( "Five", "abcde" );

   // Display the contents of the collection using the enumerator.
   Console::WriteLine( "Contents of the collection (using enumerator):" );
   PrintKeysAndValues2( mySSC );

   // Display the contents of the collection using the Keys property and the Item property.
   Console::WriteLine( "Initial contents of the collection (using Keys and Item):" );
   PrintKeysAndValues3( mySSC );

   // Tries to add a value that is too long.
   try
   {
      mySSC->Add( "Ten", "abcdefghij" );
   }
   catch ( ArgumentException^ e ) 
   {
      Console::WriteLine( e );
   }

   // Tries to add a key that is too long.
   try
   {
      mySSC->Add( "Eleven", "ijk" );
   }
   catch ( ArgumentException^ e ) 
   {
      Console::WriteLine( e );
   }

   Console::WriteLine();

   // Searches the collection with Contains.
   Console::WriteLine( "Contains \"Three\": {0}", mySSC->Contains( "Three" ) );
   Console::WriteLine( "Contains \"Twelve\": {0}", mySSC->Contains( "Twelve" ) );
   Console::WriteLine();

   // Removes an element from the collection.
   mySSC->Remove( "Two" );

   // Displays the contents of the collection.
   Console::WriteLine( "After removing \"Two\":" );
   PrintKeysAndValues2( mySSC );
}

// Uses the enumerator. 
void PrintKeysAndValues2( ShortStringDictionary^ myCol )
{
   DictionaryEntry myDE;
   System::Collections::IEnumerator^ myEnumerator = myCol->GetEnumerator();
   while ( myEnumerator->MoveNext() )
      if ( myEnumerator->Current != nullptr )
   {
      myDE =  *dynamic_cast<DictionaryEntry^>(myEnumerator->Current);
      Console::WriteLine( "   {0,-5} : {1}", myDE.Key, myDE.Value );
   }

   Console::WriteLine();
}


// Uses the Keys property and the Item property.
void PrintKeysAndValues3( ShortStringDictionary^ myCol )
{
   ICollection^ myKeys = myCol->Keys;
   IEnumerator^ myEnum1 = myKeys->GetEnumerator();
   while ( myEnum1->MoveNext() )
   {
      String^ k = safe_cast<String^>(myEnum1->Current);
      Console::WriteLine( "   {0,-5} : {1}", k, myCol->Item[ k ] );
   }

   Console::WriteLine();
}

/* 
This code produces the following output.

Contents of the collection (using enumerator):
   Three : abc
   Five  : abcde
   Two   : ab
   One   : a
   Four  : abcd

Initial contents of the collection (using Keys and Item):
   Three : abc
   Five  : abcde
   Two   : ab
   One   : a
   Four  : abcd

System.ArgumentException: value must be no more than 5 characters in length.
Parameter name: value
   at ShortStringDictionary.OnValidate(Object key, Object value)
   at System.Collections.DictionaryBase.System.Collections.IDictionary.Add(Object key, Object value)
   at SamplesDictionaryBase.Main()
System.ArgumentException: key must be no more than 5 characters in length.
Parameter name: key
   at ShortStringDictionary.OnValidate(Object key, Object value)
   at System.Collections.DictionaryBase.System.Collections.IDictionary.Add(Object key, Object value)
   at SamplesDictionaryBase.Main()

Contains "Three": True
Contains "Twelve": False

After removing "Two":
   Three : abc
   Five  : abcde
   One   : a
   Four  : abcd

*/
using System;
using System.Collections;

public class ShortStringDictionary : DictionaryBase  {

   public String this[ String key ]  {
      get  {
         return( (String) Dictionary[key] );
      }
      set  {
         Dictionary[key] = value;
      }
   }

   public ICollection Keys  {
      get  {
         return( Dictionary.Keys );
      }
   }

   public ICollection Values  {
      get  {
         return( Dictionary.Values );
      }
   }

   public void Add( String key, String value )  {
      Dictionary.Add( key, value );
   }

   public bool Contains( String key )  {
      return( Dictionary.Contains( key ) );
   }

   public void Remove( String key )  {
      Dictionary.Remove( key );
   }

   protected override void OnInsert( Object key, Object value )  {
      if ( key.GetType() != typeof(System.String) )
         throw new ArgumentException( "key must be of type String.", "key" );
      else  {
         String strKey = (String) key;
         if ( strKey.Length > 5 )
            throw new ArgumentException( "key must be no more than 5 characters in length.", "key" );
      }

      if ( value.GetType() != typeof(System.String) )
         throw new ArgumentException( "value must be of type String.", "value" );
      else  {
         String strValue = (String) value;
         if ( strValue.Length > 5 )
            throw new ArgumentException( "value must be no more than 5 characters in length.", "value" );
      }
   }

   protected override void OnRemove( Object key, Object value )  {
      if ( key.GetType() != typeof(System.String) )
         throw new ArgumentException( "key must be of type String.", "key" );
      else  {
         String strKey = (String) key;
         if ( strKey.Length > 5 )
            throw new ArgumentException( "key must be no more than 5 characters in length.", "key" );
      }
   }

   protected override void OnSet( Object key, Object oldValue, Object newValue )  {
      if ( key.GetType() != typeof(System.String) )
         throw new ArgumentException( "key must be of type String.", "key" );
      else  {
         String strKey = (String) key;
         if ( strKey.Length > 5 )
            throw new ArgumentException( "key must be no more than 5 characters in length.", "key" );
      }

      if ( newValue.GetType() != typeof(System.String) )
         throw new ArgumentException( "newValue must be of type String.", "newValue" );
      else  {
         String strValue = (String) newValue;
         if ( strValue.Length > 5 )
            throw new ArgumentException( "newValue must be no more than 5 characters in length.", "newValue" );
      }
   }

   protected override void OnValidate( Object key, Object value )  {
      if ( key.GetType() != typeof(System.String) )
         throw new ArgumentException( "key must be of type String.", "key" );
      else  {
         String strKey = (String) key;
         if ( strKey.Length > 5 )
            throw new ArgumentException( "key must be no more than 5 characters in length.", "key" );
      }

      if ( value.GetType() != typeof(System.String) )
         throw new ArgumentException( "value must be of type String.", "value" );
      else  {
         String strValue = (String) value;
         if ( strValue.Length > 5 )
            throw new ArgumentException( "value must be no more than 5 characters in length.", "value" );
      }
   }

}


public class SamplesDictionaryBase  {

   public static void Main()  {
 
      // Creates and initializes a new DictionaryBase.
      ShortStringDictionary mySSC = new ShortStringDictionary();

      // Adds elements to the collection.
      mySSC.Add( "One", "a" );
      mySSC.Add( "Two", "ab" );
      mySSC.Add( "Three", "abc" );
      mySSC.Add( "Four", "abcd" );
      mySSC.Add( "Five", "abcde" );

      // Display the contents of the collection using foreach. This is the preferred method.
      Console.WriteLine( "Contents of the collection (using foreach):" );
      PrintKeysAndValues1( mySSC );

      // Display the contents of the collection using the enumerator.
      Console.WriteLine( "Contents of the collection (using enumerator):" );
      PrintKeysAndValues2( mySSC );

      // Display the contents of the collection using the Keys property and the Item property.
      Console.WriteLine( "Initial contents of the collection (using Keys and Item):" );
      PrintKeysAndValues3( mySSC );

      // Tries to add a value that is too long.
      try  {
         mySSC.Add( "Ten", "abcdefghij" );
      }
      catch ( ArgumentException e )  {
         Console.WriteLine( e.ToString() );
      }

      // Tries to add a key that is too long.
      try  {
         mySSC.Add( "Eleven", "ijk" );
      }
      catch ( ArgumentException e )  {
         Console.WriteLine( e.ToString() );
      }

      Console.WriteLine();

      // Searches the collection with Contains.
      Console.WriteLine( "Contains \"Three\": {0}", mySSC.Contains( "Three" ) );
      Console.WriteLine( "Contains \"Twelve\": {0}", mySSC.Contains( "Twelve" ) );
      Console.WriteLine();

      // Removes an element from the collection.
      mySSC.Remove( "Two" );

      // Displays the contents of the collection.
      Console.WriteLine( "After removing \"Two\":" );
      PrintKeysAndValues1( mySSC );

   }

   // Uses the foreach statement which hides the complexity of the enumerator.
   // NOTE: The foreach statement is the preferred way of enumerating the contents of a collection.
   public static void PrintKeysAndValues1( ShortStringDictionary myCol )  {
      foreach ( DictionaryEntry myDE in myCol )
         Console.WriteLine( "   {0,-5} : {1}", myDE.Key, myDE.Value );
      Console.WriteLine();
   }

   // Uses the enumerator. 
   // NOTE: The foreach statement is the preferred way of enumerating the contents of a collection.
   public static void PrintKeysAndValues2( ShortStringDictionary myCol )  {
      DictionaryEntry myDE;
      System.Collections.IEnumerator myEnumerator = myCol.GetEnumerator();
      while ( myEnumerator.MoveNext() )
         if ( myEnumerator.Current != null )  {
            myDE = (DictionaryEntry) myEnumerator.Current;
            Console.WriteLine( "   {0,-5} : {1}", myDE.Key, myDE.Value );
         }
      Console.WriteLine();
   }

   // Uses the Keys property and the Item property.
   public static void PrintKeysAndValues3( ShortStringDictionary myCol )  {
      ICollection myKeys = myCol.Keys;
      foreach ( String k in myKeys )
         Console.WriteLine( "   {0,-5} : {1}", k, myCol[k] );
      Console.WriteLine();
   }

}


/* 
This code produces the following output.

Contents of the collection (using foreach):
   Three : abc
   Five  : abcde
   Two   : ab
   One   : a
   Four  : abcd

Contents of the collection (using enumerator):
   Three : abc
   Five  : abcde
   Two   : ab
   One   : a
   Four  : abcd

Initial contents of the collection (using Keys and Item):
   Three : abc
   Five  : abcde
   Two   : ab
   One   : a
   Four  : abcd

System.ArgumentException: value must be no more than 5 characters in length.
Parameter name: value
   at ShortStringDictionary.OnValidate(Object key, Object value)
   at System.Collections.DictionaryBase.System.Collections.IDictionary.Add(Object key, Object value)
   at SamplesDictionaryBase.Main()
System.ArgumentException: key must be no more than 5 characters in length.
Parameter name: key
   at ShortStringDictionary.OnValidate(Object key, Object value)
   at System.Collections.DictionaryBase.System.Collections.IDictionary.Add(Object key, Object value)
   at SamplesDictionaryBase.Main()

Contains "Three": True
Contains "Twelve": False

After removing "Two":
   Three : abc
   Five  : abcde
   One   : a
   Four  : abcd

*/

Imports System.Collections

Public Class ShortStringDictionary
   Inherits DictionaryBase

   Default Public Property Item(key As String) As String
      Get
         Return CType(Dictionary(key), String)
      End Get
      Set
         Dictionary(key) = value
      End Set
   End Property

   Public ReadOnly Property Keys() As ICollection
      Get
         Return Dictionary.Keys
      End Get
   End Property

   Public ReadOnly Property Values() As ICollection
      Get
         Return Dictionary.Values
      End Get
   End Property

   Public Sub Add(key As String, value As String)
      Dictionary.Add(key, value)
   End Sub

   Public Function Contains(key As String) As Boolean
      Return Dictionary.Contains(key)
   End Function 'Contains

   Public Sub Remove(key As String)
      Dictionary.Remove(key)
   End Sub

   Protected Overrides Sub OnInsert(key As Object, value As Object)
      If Not GetType(System.String).IsAssignableFrom(key.GetType()) Then
         Throw New ArgumentException("key must be of type String.", "key")
      Else
         Dim strKey As String = CType(key, String)
         If strKey.Length > 5 Then
            Throw New ArgumentException("key must be no more than 5 characters in length.", "key")
         End If
      End If 
      If Not GetType(System.String).IsAssignableFrom(value.GetType()) Then
         Throw New ArgumentException("value must be of type String.", "value")
      Else
         Dim strValue As String = CType(value, String)
         If strValue.Length > 5 Then
            Throw New ArgumentException("value must be no more than 5 characters in length.", "value")
         End If
      End If
   End Sub

   Protected Overrides Sub OnRemove(key As Object, value As Object)
      If Not GetType(System.String).IsAssignableFrom(key.GetType()) Then
         Throw New ArgumentException("key must be of type String.", "key")
      Else
         Dim strKey As String = CType(key, String)
         If strKey.Length > 5 Then
            Throw New ArgumentException("key must be no more than 5 characters in length.", "key")
         End If
      End If
   End Sub

   Protected Overrides Sub OnSet(key As Object, oldValue As Object, newValue As Object)
      If Not GetType(System.String).IsAssignableFrom(key.GetType()) Then
         Throw New ArgumentException("key must be of type String.", "key")
      Else
         Dim strKey As String = CType(key, String)
         If strKey.Length > 5 Then
            Throw New ArgumentException("key must be no more than 5 characters in length.", "key")
         End If
      End If 
      If Not GetType(System.String).IsAssignableFrom(newValue.GetType()) Then
         Throw New ArgumentException("newValue must be of type String.", "newValue")
      Else
         Dim strValue As String = CType(newValue, String)
         If strValue.Length > 5 Then
            Throw New ArgumentException("newValue must be no more than 5 characters in length.", "newValue")
         End If
      End If
   End Sub

   Protected Overrides Sub OnValidate(key As Object, value As Object)
      If Not GetType(System.String).IsAssignableFrom(key.GetType()) Then
         Throw New ArgumentException("key must be of type String.", "key")
      Else
         Dim strKey As String = CType(key, String)
         If strKey.Length > 5 Then
            Throw New ArgumentException("key must be no more than 5 characters in length.", "key")
         End If
      End If 
      If Not GetType(System.String).IsAssignableFrom(value.GetType()) Then
         Throw New ArgumentException("value must be of type String.", "value")
      Else
         Dim strValue As String = CType(value, String)
         If strValue.Length > 5 Then
            Throw New ArgumentException("value must be no more than 5 characters in length.", "value")
         End If
      End If
   End Sub

End Class


Public Class SamplesDictionaryBase

   Public Shared Sub Main()

      ' Creates and initializes a new DictionaryBase.
      Dim mySSC As New ShortStringDictionary()

      ' Adds elements to the collection.
      mySSC.Add("One", "a")
      mySSC.Add("Two", "ab")
      mySSC.Add("Three", "abc")
      mySSC.Add("Four", "abcd")
      mySSC.Add("Five", "abcde")

      ' Display the contents of the collection using For Each. This is the preferred method.
      Console.WriteLine("Contents of the collection (using For Each):")
      PrintKeysAndValues1(mySSC)

      ' Display the contents of the collection using the enumerator.
      Console.WriteLine("Contents of the collection (using enumerator):")
      PrintKeysAndValues2(mySSC)

      ' Display the contents of the collection using the Keys property and the Item property.
      Console.WriteLine("Initial contents of the collection (using Keys and Item):")
      PrintKeysAndValues3(mySSC)

      ' Tries to add a value that is too long.
      Try
          mySSC.Add("Ten", "abcdefghij")
      Catch e As ArgumentException
          Console.WriteLine(e.ToString())
      End Try

      ' Tries to add a key that is too long.
      Try
          mySSC.Add("Eleven", "ijk")
      Catch e As ArgumentException
          Console.WriteLine(e.ToString())
      End Try

      Console.WriteLine()

      ' Searches the collection with Contains.
      Console.WriteLine("Contains ""Three"": {0}", mySSC.Contains("Three"))
      Console.WriteLine("Contains ""Twelve"": {0}", mySSC.Contains("Twelve"))
      Console.WriteLine()

      ' Removes an element from the collection.
      mySSC.Remove("Two")

      ' Displays the contents of the collection.
      Console.WriteLine("After removing ""Two"":")
      PrintKeysAndValues1(mySSC)

    End Sub


    ' Uses the For Each statement which hides the complexity of the enumerator.
    ' NOTE: The For Each statement is the preferred way of enumerating the contents of a collection.
    Public Shared Sub PrintKeysAndValues1(myCol As ShortStringDictionary)
      Dim myDE As DictionaryEntry
      For Each myDE In  myCol
          Console.WriteLine("   {0,-5} : {1}", myDE.Key, myDE.Value)
      Next myDE
      Console.WriteLine()
    End Sub


    ' Uses the enumerator. 
    ' NOTE: The For Each statement is the preferred way of enumerating the contents of a collection.
    Public Shared Sub PrintKeysAndValues2(myCol As ShortStringDictionary)
      Dim myDE As DictionaryEntry
      Dim myEnumerator As System.Collections.IEnumerator = myCol.GetEnumerator()
      While myEnumerator.MoveNext()
          If Not (myEnumerator.Current Is Nothing) Then
            myDE = CType(myEnumerator.Current, DictionaryEntry)
            Console.WriteLine("   {0,-5} : {1}", myDE.Key, myDE.Value)
          End If
      End While
      Console.WriteLine()
    End Sub


    ' Uses the Keys property and the Item property.
    Public Shared Sub PrintKeysAndValues3(myCol As ShortStringDictionary)
      Dim myKeys As ICollection = myCol.Keys
      Dim k As String
      For Each k In  myKeys
          Console.WriteLine("   {0,-5} : {1}", k, myCol(k))
      Next k
      Console.WriteLine()
    End Sub

End Class


'This code produces the following output.
'
'Contents of the collection (using For Each):
'   Three : abc
'   Five  : abcde
'   Two   : ab
'   One   : a
'   Four  : abcd
'
'Contents of the collection (using enumerator):
'   Three : abc
'   Five  : abcde
'   Two   : ab
'   One   : a
'   Four  : abcd
'
'Initial contents of the collection (using Keys and Item):
'   Three : abc
'   Five  : abcde
'   Two   : ab
'   One   : a
'   Four  : abcd
'
'System.ArgumentException: value must be no more than 5 characters in length.
'Parameter name: value
'   at ShortStringDictionary.OnValidate(Object key, Object value)
'   at System.Collections.DictionaryBase.System.Collections.IDictionary.Add(Object key, Object value)
'   at SamplesDictionaryBase.Main()
'System.ArgumentException: key must be no more than 5 characters in length.
'Parameter name: key
'   at ShortStringDictionary.OnValidate(Object key, Object value)
'   at System.Collections.DictionaryBase.System.Collections.IDictionary.Add(Object key, Object value)
'   at SamplesDictionaryBase.Main()
'
'Contains "Three": True
'Contains "Twelve": False
'
'After removing "Two":
'   Three : abc
'   Five  : abcde
'   One   : a
'   Four  : abcd

Uwagi

Ważne

Nie zalecamy używania klasy DictionaryBase w celu tworzenia nowych rozwiązań.We don't recommend that you use the DictionaryBase class for new development. Zamiast tego zaleca się użycie klasy generycznej Dictionary<TKey,TValue> lub KeyedCollection<TKey,TItem>.Instead, we recommend that you use the generic Dictionary<TKey,TValue> or KeyedCollection<TKey,TItem> class . Aby uzyskać więcej informacji, zobacz kolekcje nieogólne nie mogą być używane w serwisie GitHub.For more information, see Non-generic collections shouldn't be used on GitHub.

C# Instrukcja foreach i Visual Basic dla każdej instrukcji zwracają obiekt typu elementów w kolekcji.The C# foreach statement and the Visual Basic For Each statement return an object of the type of the elements in the collection. Ponieważ każdy element DictionaryBase jest parą klucz/wartość, typ elementu nie jest typem klucza lub typem wartości.Since each element of the DictionaryBase is a key/value pair, the element type is not the type of the key or the type of the value. Zamiast tego typ elementu jest DictionaryEntry.Instead, the element type is DictionaryEntry.

Instrukcja foreach to otoka wokół modułu wyliczającego, która umożliwia tylko odczyt z kolekcji.The foreach statement is a wrapper around the enumerator, which only allows reading from, not writing to, the collection.

Uwaga

Ponieważ klucze mogą być dziedziczone i ich zachowanie zostało zmienione, ich absolutna unikatowość nie może być gwarantowana przez porównania przy użyciu metody Equals.Because keys can be inherited and their behavior changed, their absolute uniqueness cannot be guaranteed by comparisons using the Equals method.

Uwagi dotyczące dziedziczenia

Ta klasa bazowa jest udostępniana w celu ułatwienia implementacji do tworzenia kolekcji niestandardowej o jednoznacznie określonym typie.This base class is provided to make it easier for implementers to create a strongly typed custom collection. Zachęcamy do przeciągnięcia tej klasy bazowej zamiast tworzenia własnych.Implementers are encouraged to extend this base class instead of creating their own.

Elementy członkowskie tej klasy bazowej są chronione i są przeznaczone do użycia tylko przez klasę pochodną.Members of this base class are protected and are intended to be used through a derived class only.

Konstruktory

DictionaryBase() DictionaryBase() DictionaryBase() DictionaryBase()

Inicjuje nowe wystąpienie klasy DictionaryBase klasy.Initializes a new instance of the DictionaryBase class.

Właściwości

Count Count Count Count

Pobiera liczbę elementów zawartych w wystąpieniu DictionaryBase.Gets the number of elements contained in the DictionaryBase instance.

Dictionary Dictionary Dictionary Dictionary

Pobiera listę elementów zawartych w wystąpieniu DictionaryBase.Gets the list of elements contained in the DictionaryBase instance.

InnerHashtable InnerHashtable InnerHashtable InnerHashtable

Pobiera listę elementów zawartych w wystąpieniu DictionaryBase.Gets the list of elements contained in the DictionaryBase instance.

Metody

Clear() Clear() Clear() Clear()

Czyści zawartość wystąpienia DictionaryBase.Clears the contents of the DictionaryBase instance.

CopyTo(Array, Int32) CopyTo(Array, Int32) CopyTo(Array, Int32) CopyTo(Array, Int32)

Kopiuje elementy DictionaryBase do jednowymiarowego Array o określonym indeksie.Copies the DictionaryBase elements to a one-dimensional Array at the specified index.

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Określa, czy określony obiekt jest równy bieżącemu obiektowi.Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetEnumerator() GetEnumerator() GetEnumerator() GetEnumerator()

Zwraca IDictionaryEnumerator, która wykonuje iterację w wystąpieniu DictionaryBase.Returns an IDictionaryEnumerator that iterates through the DictionaryBase instance.

GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Służy jako domyślna funkcja skrótu.Serves as the default hash function.

(Inherited from Object)
GetType() GetType() GetType() GetType()

Type Pobiera bieżące wystąpienie.Gets the Type of the current instance.

(Inherited from Object)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Tworzy skróconą kopię bieżącego Objectelementu.Creates a shallow copy of the current Object.

(Inherited from Object)
OnClear() OnClear() OnClear() OnClear()

Wykonuje dodatkowe procesy niestandardowe przed wyczyszczeniem zawartości wystąpienia DictionaryBase.Performs additional custom processes before clearing the contents of the DictionaryBase instance.

OnClearComplete() OnClearComplete() OnClearComplete() OnClearComplete()

Wykonuje dodatkowe procesy niestandardowe po wyczyszczeniu zawartości wystąpienia DictionaryBase.Performs additional custom processes after clearing the contents of the DictionaryBase instance.

OnGet(Object, Object) OnGet(Object, Object) OnGet(Object, Object) OnGet(Object, Object)

Pobiera element z określonym kluczem i wartością w wystąpieniu DictionaryBase.Gets the element with the specified key and value in the DictionaryBase instance.

OnInsert(Object, Object) OnInsert(Object, Object) OnInsert(Object, Object) OnInsert(Object, Object)

Wykonuje dodatkowe procesy niestandardowe przed wstawieniem nowego elementu do wystąpienia DictionaryBase.Performs additional custom processes before inserting a new element into the DictionaryBase instance.

OnInsertComplete(Object, Object) OnInsertComplete(Object, Object) OnInsertComplete(Object, Object) OnInsertComplete(Object, Object)

Wykonuje dodatkowe procesy niestandardowe po wstawieniu nowego elementu do wystąpienia DictionaryBase.Performs additional custom processes after inserting a new element into the DictionaryBase instance.

OnRemove(Object, Object) OnRemove(Object, Object) OnRemove(Object, Object) OnRemove(Object, Object)

Wykonuje dodatkowe procesy niestandardowe przed usunięciem elementu z wystąpienia DictionaryBase.Performs additional custom processes before removing an element from the DictionaryBase instance.

OnRemoveComplete(Object, Object) OnRemoveComplete(Object, Object) OnRemoveComplete(Object, Object) OnRemoveComplete(Object, Object)

Wykonuje dodatkowe procesy niestandardowe po usunięciu elementu z wystąpienia DictionaryBase.Performs additional custom processes after removing an element from the DictionaryBase instance.

OnSet(Object, Object, Object) OnSet(Object, Object, Object) OnSet(Object, Object, Object) OnSet(Object, Object, Object)

Wykonuje dodatkowe procesy niestandardowe przed ustawieniem wartości w wystąpieniu DictionaryBase.Performs additional custom processes before setting a value in the DictionaryBase instance.

OnSetComplete(Object, Object, Object) OnSetComplete(Object, Object, Object) OnSetComplete(Object, Object, Object) OnSetComplete(Object, Object, Object)

Wykonuje dodatkowe procesy niestandardowe po ustawieniu wartości w wystąpieniu DictionaryBase.Performs additional custom processes after setting a value in the DictionaryBase instance.

OnValidate(Object, Object) OnValidate(Object, Object) OnValidate(Object, Object) OnValidate(Object, Object)

Wykonuje dodatkowe procesy niestandardowe podczas walidacji elementu z określonym kluczem i wartością.Performs additional custom processes when validating the element with the specified key and value.

ToString() ToString() ToString() ToString()

Zwraca ciąg, który reprezentuje bieżący obiekt.Returns a string that represents the current object.

(Inherited from Object)

Jawne implementacje interfejsu

ICollection.IsSynchronized ICollection.IsSynchronized ICollection.IsSynchronized ICollection.IsSynchronized

Pobiera wartość wskazującą, czy dostęp do obiektu DictionaryBase jest synchronizowany (bezpieczny wątkowo).Gets a value indicating whether access to a DictionaryBase object is synchronized (thread safe).

ICollection.SyncRoot ICollection.SyncRoot ICollection.SyncRoot ICollection.SyncRoot

Pobiera obiekt, który może służyć do synchronizowania dostępu do obiektu DictionaryBase.Gets an object that can be used to synchronize access to a DictionaryBase object.

IDictionary.Add(Object, Object) IDictionary.Add(Object, Object) IDictionary.Add(Object, Object) IDictionary.Add(Object, Object)

Dodaje element z określonym kluczem i wartością do DictionaryBase.Adds an element with the specified key and value into the DictionaryBase.

IDictionary.Contains(Object) IDictionary.Contains(Object) IDictionary.Contains(Object) IDictionary.Contains(Object)

Określa, czy DictionaryBase zawiera określony klucz.Determines whether the DictionaryBase contains a specific key.

IDictionary.IsFixedSize IDictionary.IsFixedSize IDictionary.IsFixedSize IDictionary.IsFixedSize

Pobiera wartość wskazującą, czy obiekt DictionaryBase ma stały rozmiar.Gets a value indicating whether a DictionaryBase object has a fixed size.

IDictionary.IsReadOnly IDictionary.IsReadOnly IDictionary.IsReadOnly IDictionary.IsReadOnly

Pobiera wartość wskazującą, czy obiekt DictionaryBase jest tylko do odczytu.Gets a value indicating whether a DictionaryBase object is read-only.

IDictionary.Item[Object] IDictionary.Item[Object] IDictionary.Item[Object] IDictionary.Item[Object]

Pobiera lub ustawia wartość skojarzoną z określonym kluczem.Gets or sets the value associated with the specified key.

IDictionary.Keys IDictionary.Keys IDictionary.Keys IDictionary.Keys

Pobiera obiekt ICollection zawierający klucze w obiekcie DictionaryBase.Gets an ICollection object containing the keys in the DictionaryBase object.

IDictionary.Remove(Object) IDictionary.Remove(Object) IDictionary.Remove(Object) IDictionary.Remove(Object)

Usuwa element z określonym kluczem z DictionaryBase.Removes the element with the specified key from the DictionaryBase.

IDictionary.Values IDictionary.Values IDictionary.Values IDictionary.Values

Pobiera obiekt ICollection zawierający wartości w obiekcie DictionaryBase.Gets an ICollection object containing the values in the DictionaryBase object.

IEnumerable.GetEnumerator() IEnumerable.GetEnumerator() IEnumerable.GetEnumerator() IEnumerable.GetEnumerator()

Zwraca IEnumerator, który wykonuje iterację przez DictionaryBase.Returns an IEnumerator that iterates through the DictionaryBase.

Metody rozszerzania

Cast<TResult>(IEnumerable) Cast<TResult>(IEnumerable) Cast<TResult>(IEnumerable) Cast<TResult>(IEnumerable)

Rzutuje elementy IEnumerable elementu do określonego typu.Casts the elements of an IEnumerable to the specified type.

OfType<TResult>(IEnumerable) OfType<TResult>(IEnumerable) OfType<TResult>(IEnumerable) OfType<TResult>(IEnumerable)

Filtruje elementy IEnumerable w oparciu o określony typ.Filters the elements of an IEnumerable based on a specified type.

AsParallel(IEnumerable) AsParallel(IEnumerable) AsParallel(IEnumerable) AsParallel(IEnumerable)

Włącza przetwarzanie równoległe zapytania.Enables parallelization of a query.

AsQueryable(IEnumerable) AsQueryable(IEnumerable) AsQueryable(IEnumerable) AsQueryable(IEnumerable)

IEnumerable KonwertujeIQueryabledo.Converts an IEnumerable to an IQueryable.

Dotyczy

Bezpieczeństwo wątkowe

Publiczne statyczne (Shared w Visual Basic) składowe tego typu są bezpieczne dla wątków.Public static (Shared in Visual Basic) members of this type are thread safe. Wystąpienia elementów członkowskich nie dają gwarancji bezpieczeństwa wątków.Any instance members are not guaranteed to be thread safe.

Ta implementacja nie zapewnia zsynchronizowanej (bezpiecznej wątkowo) otoki dla DictionaryBase, ale klasy pochodne mogą tworzyć własne, zsynchronizowane wersje DictionaryBase przy użyciu właściwości SyncRoot.This implementation does not provide a synchronized (thread-safe) wrapper for a DictionaryBase, but derived classes can create their own synchronized versions of the DictionaryBase using the SyncRoot property.

Wyliczanie w kolekcji nie jest wewnętrznie procedurą odporną na wielowątkowość.Enumerating through a collection is intrinsically not a thread-safe procedure. Nawet gdy kolekcja jest synchronizowana, inne wątki nadal mogą ją modyfikować. Powoduje to zgłaszanie wyjątku przez moduł wyliczający.Even when a collection is synchronized, other threads can still modify the collection, which causes the enumerator to throw an exception. Aby zagwarantować bezpieczeństwo wątków podczas wyliczania, można zablokować kolekcję podczas całego procesu wyliczania albo rejestrować wyjątki wynikłe ze zmian wprowadzanych przez inne wątków.To guarantee thread safety during enumeration, you can either lock the collection during the entire enumeration or catch the exceptions resulting from changes made by other threads.

Zobacz też