C#中如何通过接口实现事件？
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How to implement events through interface in C#?
提问by Lukas ?alkauskas
I have a problem: imagine I have a plugin-based system.
我有一个问题：假设我有一个基于插件的系统。
I need some kind of interface with which I could catch events from every plugin, which implements for example IReportinginterface.
我需要某种接口，通过它我可以从每个插件中捕获事件，例如IReporting接口。
(IReporting) object.OnSomeEvent += <.....>
But I can't find a way to do that.
但我找不到办法做到这一点。
采纳答案by aku
Instead of (IReporting)obj.XXX you should write ((IReporting)obj).XXX
你应该写 ((IReporting)obj).XXX 而不是 (IReporting)obj.XXX
public interface IFoo
{
event EventHandler Boo;
}
class Foo : IFoo
{
public event EventHandler Boo;
public void RaiseBoo()
{
if (Boo != null)
Boo(this, EventArgs.Empty);
}
}
...
private void TestClass_Boo(object sender, EventArgs e)
{
throw new NotImplementedException();
}
...
object o = new Foo();
((IFoo)o).Boo += TestClass_Boo;
((Foo)o).RaiseBoo();
Regarding plugin framework take a look at existing solutions with good architecture, for example MEF
关于插件框架，请查看具有良好架构的现有解决方案，例如MEF
