.net - VB.NET中事件的GetInvocationList

Question

我试图通过遵循WCF应用程序示例(来自Sacha Barber)来学习一些WCF原理。

现在我想将以下功能转换为VB.NET

private void BroadcastMessage(ChatEventArgs e)
{

    ChatEventHandler temp = ChatEvent;

    if (temp != null)
    {
        foreach (ChatEventHandler handler in temp.GetInvocationList())
        {
            handler.BeginInvoke(this, e, new AsyncCallback(EndAsync), null);
        }
    }
}

但是我有一些问题，因为编译器不接受以下代码

Private Sub BroadcastMessage(ByVal e As ChatEventArgs)

    Dim handlers As EventHandler(Of ChatEventArgs) = ChatEvent

    If handlers IsNot Nothing Then

        For Each handler As EventHandler(Of ChatEventArgs) In handlers.GetInvocationList()

            handler.BeginInvoke(Me, e, New AsyncCallback(AddressOf EndAsync), Nothing)

        Next

    End If

End Sub

它说

Public Shared Event ChatEvent(sender As Object, e As ChatEventArgs)' is an event, and cannot be called directly

说到这一点， 可以在VB.NET中以其他方式获得链接到某个事件的处理程序吗？

Answer 1

使用ChatEventEvent(或EventNameEvent)

它不会出现在智能感知中，但是它的成员会出现。

VB.NET在幕后创建一个变量，以隐藏编码器的复杂性...

仅在声明事件(或事件的后代)的类中可用