关于C#事件

[zkhj]

我希望在函数执行完成后，发出一个事件，应该如何做

[zilong4460072]

用委托就可以了

[threenewbee]

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            foo(OnFinished);
        }

        static void OnFinished()
        {
            Console.WriteLine("Finished!");
        }

        static void foo(Action callback)
        {
            Console.WriteLine("Do something in foo.");
            callback();
        }
    }
}

[threenewbee]

也可以这么调用：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            foo(() => { Console.WriteLine("Finished!"); });            
        }

        static void foo(Action callback)
        {
            Console.WriteLine("Do something in foo.");
            callback();
        }
    }
}

[threenewbee]

你可以绑定多个委托：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Action action = () => Console.WriteLine("Finished1.");
            action += () => Console.WriteLine("Finished2.");
            action += () => Console.WriteLine("Finished3.");
            foo(action);            
        }

        static void foo(Action callback)
        {
            Console.WriteLine("Do something in foo.");
            callback();
        }
    }
}

[兔子-顾问]

和事件有关么？

public void Test()
{
    BackgroundWorker worker = new BackgroundWorker();
    worker.RunWorkerCompleted += delegate(object sender, RunWorkerCompletedEventArgs e)
    {
        Console.WriteLine("方法异步执行完了");
    };
    worker.DoWork += worker_DoWork;
    worker.RunWorkerAsync();//启动线程去执行方法

    //同步执行就更简单了。
    worker_DoWork(null, null);
    Console.WriteLine("同步函数执行完毕。");
}

void worker_DoWork(object sender, DoWorkEventArgs e)
{
    Console.WriteLine("执行方法");
}

[laichunlin]

用委托和事件

private delegate void ddtDelegate(string str);
private ddtDelegate ddt;

private void 要执行的函数(string str)
{
   ...
   ddt(str);
}

在要发生该事件的地方注册一下该事件 如果在同一类中，则在构造函数中

   ddt+=new ddtDelegate(Instance_ddt);

   private void Instance_ddt(string str)
   {
      message.show(str);
   }

[threenewbee]

[Quote=引用 5 楼 wuyazhe 的回复:]
和事件有关么？

C# code
public void Test()
{
BackgroundWorker worker = new BackgroundWorker();
worker.RunWorkerCompleted += delegate(object sender, RunWorkerCompletedEventArgs e)
{
……
[/Quote]
对哦，如果不使用MT，不存在异步问题，根本没必要事件。

[xieyang702]

private delegate void ddtDelegate();

static void Main(string[] args)
{
ddtDelegate ddt = new ddtDelegate(OnFinished);
ddt();
}

public static void OnFinished()
{
Console.WriteLine("Finished!");
//Console.ReadLine();
}
这是我认为最好理解的代码了，呵呵，因为我也是初学者