在 GetInvocationList() 之后获得合适的 eventHandler [英] Getting suitable eventHandler after GetInvocationList()

问题描述

我有

public delegate void AdministrationEventHandler(object sender, AdministrationEventArgs e);
public static event AdministrationEventHandler MainAdministrationEventHandler;

它是我的 wcf 服务中的主要事件处理程序.我也有

It's main event handler in my wcf service. I have also

private void MyEventHandler(object sender, AdministrationEventArgs e)
{
//code
}

我添加新元素

AdministrationEventHandler userToAddEventHandler = new AdministrationEventHandler(MyEventHandler);

然后

MainAdministrationEventHandler += userToAddEventHandler;

在我的 Broadcast() 方法中，我向每个处理程序调用 MyEventHandler.我想根据 AdministrationEventArgs e 参数调用 Broadcast().

In my Broadcast() method I call MyEventHandler to each handler. I'd like to call Broadcast() according to the AdministrationEventArgs e argument.

我尝试制作类似于 MainAdministrationEventHandler 的列表并调用 Broadcast() 以获得此列表的适当元素，但它不起作用.

I tried to make something like list of MainAdministrationEventHandler and call Broadcast() for appropiate element of this list, but it doesn't work.

我通过 MainAdministrationEventHandler.GetInvocationList()

是否可以在GetInvocationList()中获取e参数后对其进行检查?

Is it possible to check e argument after getting it in GetInvocationList()?

或者我如何以其他方式调用 Broadcast() 到合适的处理程序?

Or how can I in other way call Broadcast() to suitable handlers?

推荐答案

什么是合适的处理程序?因为根据您的代码，您只能将 AdministrationEventHandler 类型的处理程序分配给该事件.

What's a suitable handler? Because based on your code you can only assign handlers of type AdministrationEventHandler to that event.

此外，从 GetInvocationList() 返回的列表仅包含要调用的处理程序.这次还没有调用它们，您需要调用它们并将 e 传递给它们.

Also, the list returned from GetInvocationList() only contains the handlers to invoke. They haven't been invoked yet this time around, and you need to invoke them and pass e to them.

应该这样做:

AdministrationEventArgs args = new AdministrationEventArgs();
Delegate[] dels = MainAdministrationEventHandler.GetInvocationList();
if (dels != null)
    foreach (Delegate handler in dels)
        handler.Invoke(this, args);

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