C#委托处理方法

本文主要是介绍C#委托处理方法，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

delegate double MathAction(double num);

    class DelegateTest
    {
        // Regular method that matches signature:
        //定义静态方示（传入参数）
        static double Double(double input)
        {
            return input * 2;
        }

        static void Main()
        {
            // Instantiate delegate with named method:
            //实例化一个委托并指定处理方法
            MathAction ma = Double;
            //MathAction MA1 = Double;
            // 定义一参数接收委托事件传入一个参数给返回值方法
            // Invoke delegate ma:
            double multByTwo = ma(4.5);
            Console.WriteLine("multByTwo: {0}", multByTwo);
            //实例化事件 {}是指定理方法
            // Instantiate delegate with anonymous method:
            MathAction ma2 = delegate(double input)
            {
                return input * input;
            };

            double square = ma2(5);
            Console.WriteLine("square: {0}", square);

            // Instantiate delegate with lambda expression
            //LamaD表达式
            MathAction ma3 = s => s * s * s;
            double cube = ma3(4.375);

            Console.WriteLine("cube: {0}", cube);
            Console.ReadKey();

            Delegate1.Del_Name a = Delegate1.result;
           int b=a(5);
           Console.WriteLine("{0}", b);

           Console.ReadKey();

           Delegate1.Del_Name a1 = delegate(int b1)
           {
               return b1 + 45;

           };

           a1(78);
           Console.WriteLine("{0}",a1(78));
           Console.ReadKey();
           Delegate1.Del_Name c1 = d1 =>d1 + 55 + d1;
           c1(6);
           Console.WriteLine("{0}", c1(78));
           Console.ReadKey();

        }
        // Output:
        // multByTwo: 9
        // square: 25
        // cube: 83.740234375

}

static class Delegate1
    {

        public delegate int Del_Name(int a);

        public static int result(int a)
        {
            int b = a * a + 5;
              return b;

        }

    }

    class myclass
    {




    }