进一步阐述C#中的委托
前面讲到C#中的委托,见文章http://www.cnblogs.com/codeshark/archive/2008/03/24/1119453.html,细心的朋友会发现,静态方法能否“ 包装”到一个类里面,进行动态调用了?答案是肯定的。代码如下:
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using System;
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delegate void EatDelegate(string food);
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class Man
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{
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private string name;
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public Man(string name)
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{
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this.name=name;
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}
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public void eat(string food)
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{
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Console.WriteLine(name+"吃"+food);
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}
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}
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class Chat
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{
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static void eatTogether(string food,params EatDelegate[] values) //可变数量的参数用委托数组实现
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{
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if (values==null)
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{
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Console.WriteLine("聊天结束");
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}
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else
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{
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EatDelegate eatChain=null; //声明一个委托链
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foreach(EatDelegate ed in values)
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eatChain+=ed;
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eatChain(food);
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Console.WriteLine();
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}
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}
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static void Main()
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{
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Man CH =new Man("葱花");
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Man YY=new Man("样样");
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Man DS=new Man("大蒜");
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EatDelegate ch=new EatDelegate(CH.eat);
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EatDelegate yy=new EatDelegate(YY.eat);
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EatDelegate ds=new EatDelegate(DS.eat);
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Console.WriteLine("葱花,样样,大蒜在聊天");
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eatTogether("西瓜",ch,yy,ds); //委托实例名称
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Console.WriteLine("葱花出去接电话");
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eatTogether("香蕉",yy,ds);
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Console.WriteLine("葱花回来了");
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eatTogether("桔子",ch,yy,ds);
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eatTogether(null,null);
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}
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}
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由此可以看出:代码的架构性至关重要。
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