1 /// <summary>
 2 
 3     /// 自定義委(wei)托
 4 
 5     /// </summary>
 6 
 7     class SelfDelegate
 8 
 9     {
10 
11         /// <summary>
12 
13         /// 顯示(shi)工(gong)具(ju)控件信息
14 
15         /// </summary>
16 
17         /// <param name="sender"></param>
18 
19         internal delegate void ToolInfo(object sender); //把委(wei)托看成是(shi)一種特殊的類,而事件(jian)就是(shi)委(wei)托類的一個實例
20 
21  
22 
23         /// <summary>
24 
25         /// 顯示控(kong)件(jian)信息事件(jian)
26 
27         /// </summary>
28 
29         internal event SelfDelegate.ToolInfo ToolName;
30 
31  
32 
33         /// <summary>
34 
35         /// 事件觸(chu)發機制(zhi)
36 
37         /// </summary>
38 
39         /// <param name="sender"></param>
40 
41         internal void doEvent(object sender)
42 
43         {
44 
45             ToolName(sender);//事件(jian)名(ming)(ming)（方法(fa)簽名(ming)(ming)）
46 
47         }
48 
49  
50 
51     }

 1   SelfDelegate sd = new SelfDelegate();
 2 
 3         /// <summary>
 4 
 5         /// this.button1.Click += new System.EventHandler(this.button1_Click);
 6 
 7         /// 為事件(jian)加(jia)上(shang)一個委托實例，這(zhe)行是ＶＳ自動添加(jia)上(shang)去的
 8 
 9         /// this.button1就(jiu)是我們剛(gang)剛(gang)添加(jia)的按鈕
10 
11         /// </summary>
12 
13         /// <param name="sender"></param>
14 
15         /// <param name="e"></param>
16 
17         private void button1_Click(object sender, EventArgs e)
18 
19         {
20 
21             MessageBox.Show("按(an)鈕單擊事件(jian)被觸(chu)發");
22 
23  
24 
25             sd.ToolName += new SelfDelegate.ToolInfo(ShowToolName);
26 
27             sd.ToolName += new SelfDelegate.ToolInfo(ShowToolValue);
28 
29             sd.doEvent(sender); //將本(ben)對象源作為(wei)參(can)數(shu)傳(chuan)遞(di)
30 
31         }
32 
33  
34 
35         #region　實現了委托方法簽名的方法
36 
37         /// <summary>
38 
39         /// 顯示控(kong)件(jian)名稱
40 
41         /// </summary>
42 
43         /// <param name="sender"></param>
44 
45         private void ShowToolName(object sender)
46 
47         {
48 
49             Button btn = sender as Button;
50 
51             if (btn != null) //轉換成功，失敗(bai)為(wei)null,系統不(bu)會拋異常
52 
53             {
54 
55                 MessageBox.Show(string.Format("控件名稱(cheng):{0}", btn.Name));
56 
57             }
58 
59         }
60 
61  
62 
63         private void ShowToolValue(object sender)
64 
65         {
66 
67             Button btn = sender as Button;
68 
69             if (btn != null) //轉換成功，失敗為(wei)null,系統不會(hui)拋異常
70 
71             {
72 
73                 MessageBox.Show(string.Format("控件值：{0}", btn.Text));
74 
75             }
76 
77         }
78 
79         #endregion