C#委托实例

//委托是一个特殊的类,它定义了方法的类型，可以将方法当作另一个方法的参数来进行传递，这种方法动态地赋给参数的做法，可以避免在程序中大量使用if-else(Switch)语句，同时也使得程序具有更好的扩展性。委托机制尤其适合在使用事件处理的编程模式或者类的静态方法，以及在需要封装和灵活的组织方法的场合

//实例1using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace linq{       //实例1        //简单的来说委托就是把方法当参数传         public delegate int testdelegate(int i);//定义委托        class Delegates        {            public int testfuck(int x)            {                Console.WriteLine(x * x);                return x * x;            }            public int testfuck1(int x)            {                Console.WriteLine(x / x);                return x / x;            }        }}//     static void Main(string[] args)        {            Delegates dete = new Delegates();            testdelegate ts;//声明委托            ts = new testdelegate(dete.testfuck);//实例委托            ts += new testdelegate(dete.testfuck1);//多个绑定            ts(2);            Console.ReadKey();           // linq1();        }//实例二using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;namespace Stockes{    public partial class DelegateForms : Form    {        public DelegateForms()        {            InitializeComponent();        }        private void textBox1_TextChanged(object sender, EventArgs e)        {        }        private delegate void writeTxtBox(char cha);//定义委托        private writeTxtBox writebox;//声明委托        private void button1_Click(object sender, EventArgs e)        {            if (radioButton1.Checked)            {                groupBox4.Text = "正在运行";                groupBox2.Refresh();                writebox = new writeTxtBox(writeText1);//实例委托                write(writebox);                textBox1.Clear();            }            else if (radioButton2.Checked)            {                groupBox5.Text="正在运行";                groupBox3.Refresh();                writebox = new writeTxtBox(writeText2);//实例委托                write(writebox);                textBox2.Clear();            }            groupBox4.Text = "";            groupBox5.Text = "";        }        private void write(writeTxtBox write)//使用委托        {            String txt3 = textBox3.Text;            for (int i = 0; i < txt3.Length; i++)            {                write(txt3[i]);                DateTime now = DateTime.Now;                while (now.AddSeconds(1) > DateTime.Now){}            }        }        public void writeText1(char str)        {            textBox1.AppendText(str.ToString());        }        public void writeText2(char str)        {            textBox2.AppendText(str.ToString());        }    }}