C＃-Pipeline风格的事件模型 [英] C# -Pipeline Style event model

问题描述

在ASP.NET Web应用程序，事件在particluar顺序触发：

In ASP.NET Web Apps , events are fired in particluar order :

为了简单起见，加载=>验证=>回传=>渲染

假设我想开发这种管道-styled事件

Suppose I want to develop such pipeline -styled event

例如：

事件1 [Audiance都在收集，伙计们{事件2和事件3请等待，直到i信号}]

Event 1 [ "Audiance are gathering" ,Guys{ Event 2 and Event 3 Please wait until i signal }]

$ b $后b事件1完成了它的任务

事件2 [{事件2，事件3Audiance云集！我的任务已经结束} ]

Event 2 [ { Event 2, Event 3 "Audiance gathered! My task is over } ]

事件2接管控制来执行它的任务

事件2 [Audiance都记录在事件3请等待i信号]

Event 2 [ " Audiance are Logging in " Event 3 please wait until i signal ]

后，事件2完成了它的任务

......

事件3 [演示通过乔恩斯基特超过:)]

Event 3 [ "Presentation By Jon skeet is Over :) "]

通过非常简单的例子可以任何人解释，我如何设计呢？

With very basic example can anybody explain ,how can i design this ?

推荐答案

一个非常简单的解决方案，这也是近究竟在ASP.NET情况：

A very simple solution, that is also close to what actually happens in ASP.NET:

class EventChain
{    
    public event EventHandler Phase1Completed;
    public event EventHandler Phase2Completed;
    public event EventHandler Phase3Completed;

    protected void OnPhase1Complete()
    {
        if (Phase1Completed != null)
        {
            Phase1Completed(this, EventArgs.Empty);
        }
    }

    public void Process()
    {
        // Do Phase 1
        ...
        OnPhase1Complete();

        // Do Phase 2
        ...
        OnPhase2Complete();    
    }
}

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