窗口父子俩

 1     /// <summary>
 2         /// 判断子窗口是否已经打开
 3         /// </summary>
 4         /// <param name="aform"></param>
 5         /// <returns></returns>
 6         static bool OpenOnce(System.Windows.Forms.Form  aform)
 7         {
 8             bool result=false;
 9             foreach(Form form in frmMain.MdiChildren )
10             {
11                 if(aform.Text==form.Text)
12                 {
13                     
14                     form.Activate();
15                     result=true;
16                     
17                     break;
18                 }
19                 
20             }
21             return result;
22         }
23         /// <summary>
24         /// 关闭指定的窗口
25         /// </summary>
26         /// <param name="aform"></param>
27         public static void  CloseChild(System.Windows.Forms.Form  aform)
28         {
29         
30             foreach(Form form in frmMain.MdiChildren )
31             {
32                 if(aform.Text==form.Text)
33                 {
34                     
35                     form.Close();
36                     
37                     break;
38                 }
39 
40             }
41             
42         }
43         /// <summary>
44         /// 以子窗体的形式显示窗体
45         /// </summary>
46         /// <param name="childForm"></param>
47         public static  void ShowChildWin(System.Windows.Forms.Form childForm)
48         {
49             if(!OpenOnce(childForm))
50             {
51                 childForm.MdiParent=frmMain;
52                 childForm.WindowState=FormWindowState.Maximized;
53                 childForm.Show();
54             }
55             else
56                 childForm.Dispose();
57         }
58 
59         /// <summary>
60         /// 关闭所有子窗口
61         /// </summary>
62         private void CloseAllChild()
63         {
64             foreach(Form form in this.MdiChildren )
65             {
66                 
67                 form.Close();                    
68                     
69             }            
70 
71         }