通过子程序引发事件

Raising an event through subroutine

我正在尝试通过子例程引发一个事件,以通知我程序的一些观察者动画过渡已完成。但它告诉我它不能直接调用,我需要使用 RaiseEvent。我尝试添加处理程序,但它仍然不起作用。我该怎么办?

Utility.raiseEventTest(Me.TransitionCompletedEvent, Me, New Transition.Args())

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 Public Shared Sub raiseEventTest(Of T As System.EventArgs)(theEvent As EventHandler(Of T), sender As Object, args As T)
        If theEvent Is Nothing Then
            Return
        End If
        '
        For Each handler As EventHandler(Of T) In theEvent.GetInvocationList()
            Try
                Dim target As ISynchronizeInvoke = TryCast(handler.Target, ISynchronizeInvoke)
                If target Is Nothing OrElse target.InvokeRequired = False Then
                    handler(sender, args)
                Else
                    target.BeginInvoke(handler, New Object() {sender, args})
                End If
            Catch generatedExceptionName As Exception
            End Try
        Next
    End Sub

按提示使用RaiseEvent即可,不需要使用那种代码...

变化:

Utility.raiseEventTest(Me.TransitionCompletedEvent, Me, New Transition.Args())

收件人:

RaiseEvent TransitionCompleted(Me, New Transition.Args())

所有订阅者都会收到通知并收到事件。