24.委託(1)

1. 簡單的delegate(小王吃西瓜... ...)

 

代碼

namespace _24.委託_1_
{

delegate void Eat(string food);
public partial class Form1 : Form
    {
public Form1()
        {
            InitializeComponent();
        }

static void xwEat(string food)
        {
            MessageBox.Show("小王吃" + food);
        }
private void Form1_Load(object sender, EventArgs e)
        {

            Eat xw = new Eat(xwEat);
            xw("西瓜");
//  xwEat("西瓜");
        }
    }

}

2. 接著上面的繼續擴充

代碼

namespace _24.委託_1_
{

delegate void Eat(string food);
public partial class Form1 : Form
    {
public Form1()
        {
            InitializeComponent();
        }

static void xwEat(string food)
        {
            MessageBox.Show("小王吃" + food);
        }
static void xlEat(string food)
        {
            MessageBox.Show("小李吃" + food);
        }
static void xzEat(string food)
        {
            MessageBox.Show("小趙吃" + food);
        }
private void Form1_Load(object sender, EventArgs e)
        {

            Eat xw = new Eat(xwEat);
            Eat xl = new Eat(xlEat);
            Eat xz = new Eat(xzEat);
            xw("西瓜");
            xl("西瓜");
            xz("西瓜");
//  xwEat("西瓜");
        }
    }

}

3. 接著上面的繼續擴充

代碼

namespace _24.委託_1_
{

delegate void Eat(string food);
public partial class Form1 : Form
    {
public Form1()
        {
            InitializeComponent();
        }

static void xwEat(string food)
        {
            MessageBox.Show("小王吃" + food);
        }
static void xlEat(string food)
        {
            MessageBox.Show("小李吃" + food);
        }
static void xzEat(string food)
        {
            MessageBox.Show("小趙吃" + food);
        }
private void Form1_Load(object sender, EventArgs e)
        {

            Eat xw = new Eat(xwEat);
            Eat xl = new Eat(xlEat);
            Eat xz = new Eat(xzEat);
            Eat EatChain;
            EatChain = xw + xl + xz;
            EatChain("西瓜");

        }
    }

}

4. 接著上面的繼續擴充

代碼

namespace _24.委託_1_
{

delegate void Eat(string food);
public partial class Form1 : Form
    {
public Form1()
        {
            InitializeComponent();
        }

static void xwEat(string food)
        {
            MessageBox.Show("小王吃" + food);
        }
static void xlEat(string food)
        {
            MessageBox.Show("小李吃" + food);
        }
static void xzEat(string food)
        {
            MessageBox.Show("小趙吃" + food);
        }
private void Form1_Load(object sender, EventArgs e)
        {

            Eat xw = new Eat(xwEat);
            Eat xl = new Eat(xlEat);
            Eat xz = new Eat(xzEat);
            Eat EatChain;
            MessageBox.Show("三人開會");
            EatChain = xw + xl + xz;
            EatChain("西瓜");
            MessageBox.Show("小王出去接電話");
            EatChain -= xw;
            EatChain("葡萄 ");
            MessageBox.Show("小王回來和大家一起吃橘子");
            EatChain += xw;
            EatChain("橘子");

        }
    }

}

5. 接著上面的繼續擴充

代碼

namespace _24.委託_1_
{

delegate void Eat(string food);
public partial class Form1 : Form
    {
public Form1()
        {
            InitializeComponent();
        }

private void Form1_Load(object sender, EventArgs e)
        {
            Eat eatChain = null;
            eatChain += delegate(string food)
            {
                MessageBox.Show("小王吃" + food);
            };
            eatChain += delegate(string food)
            {
                MessageBox.Show("小趙吃" + food);
            };
            eatChain("西瓜");

        }
    }

}