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CacheDependency.SetUtcLastModified Method

Marks the time when a dependency last changed.

Namespace:  System.Web.Caching
Assembly:  System.Web (in System.Web.dll)

protected void SetUtcLastModified(
	DateTime utcLastModified
)

Parameters

utcLastModified
Type: System.DateTime

The time when the dependency last changed.

The following code example shows a class that inherits from the CacheDependency class. It creates a public method, ResetDependency, that uses the SetUtcLastModified method to change the time at which the dependency was modified, and then calls the NotifyDependencyChanged method.

' Declare the class. 
Public Class CustomCacheDependency 
   Inherits CacheDependency

     ' Constructor with no arguments  
     ' provided by CacheDependency class. 
     Public Sub New()
     End Sub ' New 

     ' 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

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0
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