CacheDependency.DependencyDispose Método

protected:
 virtual void DependencyDispose();

protected virtual void DependencyDispose ();

abstract member DependencyDispose : unit -> unit
override this.DependencyDispose : unit -> unit

Protected Overridable Sub DependencyDispose ()

Exemplos

O exemplo de código a seguir mostra uma classe que herda da CacheDependency classe e substitui o DependencyDispose método . Quando esse método é chamado, ele define uma propriedade booliana personalizada chamada Disposedtrue.

' Declare the class.
Public Class CustomCacheDependency 
   Inherits CacheDependency

     ' Constructor with no arguments 
     ' provided by CacheDependency class.
     Public Sub New()
     End Sub
   
     ' Declare a Boolean field named disposedValue.
     ' This will be used by Disposed property.
     Private disposedValue As Boolean                
     
     ' Create accessors for the Disposed property.
     Public Property Disposed As Boolean
       Get
           Return disposedValue
       End Get
       Set (ByVal value As Boolean)
           disposedValue = value
       End Set
     End Property
     
     ' Create a public method that sets the latest
     ' changed time of the CustomCacheDependency
     ' and notifies the underlying CacheDependency that the 
     ' dependency has changed, even though the HasChanged
     ' property is false.
     Public Sub ResetDependency()
        If Me.HasChanged = False              
           SetUtcLastModified(DateTime.MinValue)
           NotifyDependencyChanged(Me, EventArgs.Empty)
        End If
     End Sub
     
     ' Overrides the DependencyDispose method to set the
     ' Disposed proerty to true. This method automatically
     ' notifies the underlying CacheDependency object to 
     ' release any resources associated with this class. 
     Protected Overrides Sub DependencyDispose()
        Disposed = True
     End Sub
     
     
 End Class

Comentários

Qualquer classe derivada da CacheDependency classe é necessária para implementar esse método para limpar os recursos usados pela classe derivada.

Aplica-se a

Confira também

• Cache
• Insert(String, Object, CacheDependency)
• Armazenar dados do aplicativo em cache