CacheDependency.SetUtcLastModified(DateTime) 方法
定义
重要
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标记依赖项的上次更改时间。
protected:
void SetUtcLastModified(DateTime utcLastModified);protected void SetUtcLastModified (DateTime utcLastModified);member this.SetUtcLastModified : DateTime -> unitProtected Sub SetUtcLastModified (utcLastModified As DateTime)参数
- utcLastModified
- DateTime
依赖项的上次更改时间。
示例
下面的代码示例演示从 CacheDependency 类继承的类。 它创建一个公共方法 ResetDependency，该方法使用 SetUtcLastModified 方法更改修改依赖项的时间，然后调用 NotifyDependencyChanged 方法。
' 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
