public void Show()
{
NoReturnNoPara noReturnNoPara = new NoReturnNoPara(DoNothing); //2 委托的实例化
noReturnNoPara.Invoke(); //3 委托实例的调用
{
WithReturnWithPara withReturnWithPara = new WithReturnWithPara(this.DoNothing2);
string result = withReturnWithPara.Invoke(2);
Console.WriteLine(result);
}
{
//多播委托：一个变量保存多个方法，可以增减；invoke的时候可以按顺序执行
//+= 为委托实例按顺序增加方法，形成方法链，Invoke时，按顺序依次执行
NoReturnNoPara method = new NoReturnNoPara(this.DoNothing);
method += new NoReturnNoPara(this.DoNothing);
method += new NoReturnNoPara(DoNothingStatic);
method.Invoke();
foreach (NoReturnNoPara item in method.GetInvocationList())
{
item.Invoke();
}
//-= 为委托实例移除方法，从方法链的尾部开始匹配，遇到第一个完全吻合的，移除且只移除一个，没有也不异常
method -= new NoReturnNoPara(this.DoNothing);
method -= new NoReturnNoPara(DoNothingStatic);
method.Invoke();
}
}
public static void Show()
{
{
NoWithReturnPara method = new NoWithReturnPara(ShowStudent); //实例化委托
method.Invoke(186, "joney"); //调用委托
}
{
NoWithReturnPara method = delegate(int id, string name)//匿名方法
{
Console.WriteLine("id={0},name={1}正在上班。", id, name);
};
method.Invoke(213, "Saly");
}
{
NoWithReturnPara method = (id, name) =>
{
Console.WriteLine("id={0},name={1}正在开会。", id, name);
};
method.Invoke(88, "Jamer");
}
{
NoWithReturnPara method = (id, name) => Console.WriteLine("id={0},name={1}正在执行终极任务。", id, name);
method.Invoke(168, "Hammer");
}
{
NoReturnNoPara method = () => { };
NoWithReturnWithOnePara method1 = i => Console.WriteLine(i);
method1.Invoke(12);
}
{
WithReturnWithPara method = (m, n) => { return(DateTime.Now.Second); };
Console.WriteLine("当前时间second={0}", method.Invoke(1, "jj"));
}
{
WithReturnWithPara method = (m, n) => DateTime.Now.Second;
Console.WriteLine("当前时间second={0}", method.Invoke(1, "kk"));
}
{
Action method = () => { };
Action <int> act1 = i => { };
}
}
