CacheDependency.SetUtcLastModified(DateTime) Metodo

Definizione

Spazio dei nomi:

System.Web.Caching

Assembly:

System.Web.dll

Indica l'ora dell'ultima modifica apportata a una dipendenza.

protected:
 void SetUtcLastModified(DateTime utcLastModified);

protected void SetUtcLastModified (DateTime utcLastModified);

member this.SetUtcLastModified : DateTime -> unit

Protected Sub SetUtcLastModified (utcLastModified As DateTime)

Parametri

utcLastModified

DateTime

Ora dell'ultima modifica apportata alla dipendenza.

Esempio

Nell'esempio di codice seguente viene illustrata una classe che eredita dalla CacheDependency classe . Crea un metodo pubblico, ResetDependency, che usa il SetUtcLastModified metodo per modificare il momento in cui la dipendenza è stata modificata e quindi chiama il NotifyDependencyChanged metodo .

' 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

Vedi anche

• Cache
• Insert(String, Object, CacheDependency)
• Memorizzazione nella cache dei dati dell'applicazione