ISessionStateItemCollection Interface

Definitie

public interface class ISessionStateItemCollection : System::Collections::ICollection

public interface ISessionStateItemCollection : System.Collections.ICollection

type ISessionStateItemCollection = interface
    interface ICollection
    interface IEnumerable

Public Interface ISessionStateItemCollection
Implements ICollection

Afgeleid

System.Web.SessionState.SessionStateItemCollection

Implementeringen

ICollection IEnumerable

Voorbeelden

In het volgende codevoorbeeld wordt de ISessionStateItemCollection klasse geïmplementeerd en wordt de SortedList klasse gebruikt om namen en waarden van sessiestatusvariabelen op te slaan.

using System;
using System.Web;
using System.Web.SessionState;
using System.Collections;
using System.Collections.Specialized;

namespace Samples.AspNet.Session
{

  public class MySessionStateItemCollection : ISessionStateItemCollection
  {
    private SortedList pItems = new SortedList();
    private bool pDirty = false;

    public bool Dirty
    {
      get { return pDirty; }
      set { pDirty = value; }
    }

    public object this[int index]
    {
      get { return pItems[index]; }
      set
      {
        pItems[index] = value;
        pDirty = true;
      }
    }

    public object this[string name]
    {
      get { return pItems[name]; }
      set
      {
        pItems[name] = value;
        pDirty = true;
      }
    }

    public NameObjectCollectionBase.KeysCollection Keys
    {
      get { return (NameObjectCollectionBase.KeysCollection)pItems.Keys; }
    }

    public int Count
    {
      get { return pItems.Count; }
    }

    public Object SyncRoot
    {
      get { return this; }
    }

    public bool IsSynchronized
    {
      get { return false; }
    }

    public IEnumerator GetEnumerator()
    {
      return pItems.GetEnumerator(); 
    }

    public void Clear()
    {
      pItems.Clear();
      pDirty = true;
    }

    public void Remove(string name)
    {
      pItems.Remove(name);
      pDirty = true;
    }

    public void RemoveAt(int index)
    {
      if (index < 0 || index >= this.Count)
        throw new ArgumentOutOfRangeException("The specified index is not within the acceptable range.");

      pItems.RemoveAt(index);
      pDirty = true;
    }

    public void CopyTo(Array array, int index)
    {
      pItems.CopyTo(array, index);
    }
  }
}

Imports System.Web
Imports System.Web.SessionState
Imports System.Collections
Imports System.Collections.Specialized


Namespace Samples.AspNet.Session

  Public Class MySessionStateItemCollection
    Implements ISessionStateItemCollection
  
    Private pItems As SortedList = New SortedList()
    Private pDirty As Boolean = False

    Public Property Dirty As Boolean Implements ISessionStateItemCollection.Dirty    
      Get
        Return pDirty
      End Get
      Set
        pDirty = value
      End Set
    End Property

    Public Property Item(index As Integer) As Object Implements ISessionStateItemCollection.Item
      Get
        Return pItems(index)
      End Get
      Set
        pItems(index) = value
        pDirty = True
      End Set
    End Property

    Public Property Item(name As String) As Object Implements ISessionStateItemCollection.Item
      Get
        Return pItems(name)
      End Get
      Set
        pItems(name) = value
        pDirty = True
      End Set
    End Property

    Public ReadOnly Property Keys As NameObjectCollectionBase.KeysCollection _
      Implements ISessionStateItemCollection.Keys
      Get
        Return CType(pItems.Keys, NameObjectCollectionBase.KeysCollection)
      End Get
    End Property

    Public ReadOnly Property Count As Integer Implements ICollection.Count    
      Get
        Return pItems.Count
      End Get
    End Property

    Public ReadOnly Property SyncRoot As Object Implements ICollection.SyncRoot    
      Get
        Return Me
      End Get
    End Property

    Public ReadOnly Property IsSynchronized As Boolean Implements ICollection.IsSynchronized
      Get
        Return False
      End Get
    End Property

    Public Function GetEnumerator() As IEnumerator Implements ICollection.GetEnumerator    
      Return pItems.GetEnumerator() 
    End Function

    Public Sub Clear() Implements ISessionStateItemCollection.Clear
      pItems.Clear()
      pDirty = True
    End Sub

    Public Sub Remove(name As String) Implements ISessionStateItemCollection.Remove
      pItems.Remove(name)
      pDirty = True
    End Sub

    Public Sub RemoveAt(index As Integer) Implements ISessionStateItemCollection.RemoveAt 
      If index < 0 OrElse index >= Me.Count Then _
        Throw New ArgumentOutOfRangeException("The specified index is not within the acceptable range.")
   
      pItems.RemoveAt(index)
      pDirty = True
    End Sub

    Public Sub CopyTo(array As Array, index As Integer) Implements ICollection.CopyTo
      pItems.CopyTo(array, index)
    End Sub

  End Class

End Namespace

Opmerkingen

De ISessionStateItemCollection interface definieert de verzameling sessie-items die door de HttpSessionStateContainer klasse worden blootgesteld aan toepassingscode.

De ASP.NET implementatie van de interface ISessionStateItemCollection is de klasse SessionStateItemCollection.

Als u een klasse maakt die is afgeleid van de SessionStateStoreProviderBase klasse om sessiegegevens op te slaan, kunt u de SessionStateItemCollection klasse gebruiken om de opgeslagen objecten te beheren of de ISessionStateItemCollection interface in uw eigen verzamelingsbeheer te implementeren.

Als u de ISessionStateItemCollection interface implementeert, moet u ook een klasse maken die de SessionStateStoreProviderBase klasse over neemt om gebruik te kunnen maken van uw ISessionStateItemCollection implementatie voor het beheren van sessievariabelen.

Een ISessionStateItemCollection implementatie moet ook de leden van de ICollection interface implementeren.

Zie ook

• Overzicht van ASP.NET sessiestatus