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C# 跨进程设置窗口owner

日期：2018-07-25点击：535收藏

窗口间跨进程通信

1. 发送方

 1 public const int WM_InsertChart_Completed = 0x00AA;  2  3 //查找窗口  4 [DllImport("User32.dll", EntryPoint = "FindWindow")]  5 public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);  6  7 //发送信息  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 }

还有一个PostMessage方法，和SendMessage类似。

2. 接收方

在winform中，不同进程间窗口通信

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

在WPF中，如何在俩个不同进程的窗口之间通信.

 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 }

传递具体的数据，可参考：http://www.360doc.com/content/18/0131/15/45112790_726705014.shtml

跨进程设置窗口owner，并禁用父窗口

此跨进程案例中，以子窗口A与父窗口B为例

1. 获取父窗口B的句柄

windowB的句柄Inptr,可以通过应用程序的名称或者线程Id,获取窗口的句柄。具体可参考 C# 通过进程名/进程Id 操作窗口

注：客户端之间如果有跨线程通信机制（局域网等），可以直接将父窗口B的句柄传给另一进程的子窗口A

2. 设置子窗口A的owner

var helper = new WindowInteropHelper(windowA);
helper.Owner = windowBInptr;

设置后，仅仅是显示在父窗口B的上层。禁用父窗口见下~

3. 通过消息机制禁用父窗口

子窗口A弹出后，向父窗口B发送禁用窗口消息：

其中，消息值的定义，不能窗口自带的消息值。窗口自带的消息列表，可参考 https://www.itsvse.com/thread-2755-1-1.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 //发送信息 15 [DllImport("User32.dll", EntryPoint = "SendMessage")] 16 public static extern int SendMessage(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam);

父窗口监听消息，并处理子窗口A发送的窗口禁用消息

 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 }