C# 跨程序 設定視窗owner

原文: C# 跨程序 設定視窗owner

視窗間跨程序通信

1. 發送方

1     public const int WM_InsertChart_Completed = 0x00AA;
 2 
 3     //查找視窗
 4     [DllImport("User32.dll", EntryPoint = "FindWindow")]
 5     public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
 6 
 7     //發送資訊
 8     [DllImport("User32.dll", EntryPoint = "SendMessage")]
 9     public static extern int SendMessage(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam);
10 
11     private void PostMessage()
12     {
13         var procs = Process.GetProcessesByName("MyExample");
14 
15         foreach (var process in procs)
16         {
17             SendMessage(process.MainWindowHandle, WM_InsertChart_Completed, IntPtr.Zero, IntPtr.Zero);
18         }
19     }      

還有一個PostMessage方法，和SendMessage類似。

2. 接收方

在winform中，不同程序間視窗通信

1 protected override void DefWndProc(ref Message m)
2 {
3     ......
4 }      

在WPF中，如何在倆個不同程序的視窗之間通信.

1     protected override void OnSourceInitialized(EventArgs e)
 2     {
 3         base.OnSourceInitialized(e);
 4         var hwndSource = PresentationSource.FromVisual(this) as HwndSource;
 5         hwndSource?.AddHook(new HwndSourceHook(WndProc));
 6     }
 7     public const int WM_InsertChart_Completed = 0x00AA;
 8     public static IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
 9     {
10         if (msg == WM_InsertChart_Completed )
11         {
12                       .............
13         }
14 
15         return hwnd;
16     }      

傳遞具體的資料，可參考：

http://www.360doc.com/content/18/0131/15/45112790_726705014.shtml

跨程序設定視窗owner，并禁用父視窗

 此跨程序案例中，以子視窗A與父視窗B為例

1. 擷取父視窗B的句柄

windowB的句柄Inptr,可以通過應用程式的名稱或者線程Id,擷取視窗的句柄。具體可參考

C# 通過程序名/程序Id 操作視窗

注：用戶端之間如果有跨線程通信機制（區域網路等），可以直接将父視窗B的句柄傳給另一程序的子視窗A

2. 設定子視窗A的owner

    var helper = new WindowInteropHelper(windowA);

    helper.Owner = windowBInptr;

設定後，僅僅是顯示在父視窗B的上層。禁用父視窗見下~

3. 通過消息機制禁用父視窗

子視窗A彈出後，向父視窗B發送禁用視窗消息：

其中，消息值的定義，不能視窗自帶的消息值。視窗自帶的消息清單，可參考 

https://www.cnblogs.com/shangdawei/p/4014535.html

1         public const int Msg_SetWindowUnEnabled = 100000;
 2         public const int Msg_SetWindowEnabled = 100001;
 3 
 4         public static void SetWindowUnEnabled(IntPtr windowIntPtr)
 5         {
 6             SendMessage(windowIntPtr, Msg_SetWindowUnEnabled, IntPtr.Zero, IntPtr.Zero);
 7         }
 8 
 9         public static void SetWindowEnabled(IntPtr windowIntPtr)
10         {
11             SendMessage(windowIntPtr, Msg_SetWindowEnabled, IntPtr.Zero, IntPtr.Zero);
12         }
13 
14         //發送資訊
15         [DllImport("User32.dll", EntryPoint = "SendMessage")]
16         public static extern int SendMessage(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam);      

父視窗監聽消息，并處理子視窗A發送的視窗禁用消息

1     protected override void OnSourceInitialized(EventArgs e)
 2     {
 3         base.OnSourceInitialized(e);
 4         var hwndSource = PresentationSource.FromVisual(this) as HwndSource;
 5         hwndSource?.AddHook(new HwndSourceHook(WndProc));
 6     }
 7 
 8     public IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
 9     {
10         if (msg == WindowHandleHelper.Msg_SetWindowUnEnabled)
11         {
12             this.IsEnabled = false;
13         }
14         else if (msg == WindowHandleHelper.Msg_SetWindowEnabled)
15         {
16             this.IsEnabled = true;
17         }
18 
19         return hwnd;
20     }      

 4. 跨程序的模态視窗

以上設定将視窗A置于另一程序的視窗B上層，并将視窗B設定為禁用。

如果視窗A需要視窗回報動畫（回報動畫可以是模态，也可以是陰影，見我之前的水文《

WPF window 子視窗回報效果（抖動/陰影漸變)

》）