C# 跨进程 设置窗口owner

窗口间跨进程通信

1. 发送方

    public const int WM_InsertChart_Completed = 0x00AA;

    //查找窗口
    [DllImport("User32.dll", EntryPoint = "FindWindow")]
    public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

    //发送信息
    [DllImport("User32.dll", EntryPoint = "SendMessage")]
    public static extern int SendMessage(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam);

    private void PostMessage()
    {
        var procs = Process.GetProcessesByName("MyExample");

        foreach (var process in procs)
        {
            SendMessage(process.MainWindowHandle, WM_InsertChart_Completed, IntPtr.Zero, IntPtr.Zero);
        }
    }

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

protected override void DefWndProc(ref Message m)
{
    ......
}

在WPF中，如何在俩个不同进程的窗口之间通信.

    protected override void OnSourceInitialized(EventArgs e)
    {
        base.OnSourceInitialized(e);
        var hwndSource = PresentationSource.FromVisual(this) as HwndSource;
        hwndSource?.AddHook(new HwndSourceHook(WndProc));
    }
    public const int WM_InsertChart_Completed = 0x00AA;
    public static IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
    {
        if (msg == WM_InsertChart_Completed )
        {
                      .............
        }

        return hwnd;
    }

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.cnblogs.com/shangdawei/p/4014535.html

        public const int Msg_SetWindowUnEnabled = 100000;
        public const int Msg_SetWindowEnabled = 100001;

        public static void SetWindowUnEnabled(IntPtr windowIntPtr)
        {
            SendMessage(windowIntPtr, Msg_SetWindowUnEnabled, IntPtr.Zero, IntPtr.Zero);
        }

        public static void SetWindowEnabled(IntPtr windowIntPtr)
        {
            SendMessage(windowIntPtr, Msg_SetWindowEnabled, IntPtr.Zero, IntPtr.Zero);
        }

        //发送信息
        [DllImport("User32.dll", EntryPoint = "SendMessage")]
        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

    protected override void OnSourceInitialized(EventArgs e)
    {
        base.OnSourceInitialized(e);
        var hwndSource = PresentationSource.FromVisual(this) as HwndSource;
        hwndSource?.AddHook(new HwndSourceHook(WndProc));
    }

    public IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
    {
        if (msg == WindowHandleHelper.Msg_SetWindowUnEnabled)
        {
            this.IsEnabled = false;
        }
        else if (msg == WindowHandleHelper.Msg_SetWindowEnabled)
        {
            this.IsEnabled = true;
        }

        return hwnd;
    }

 4. 跨进程的模态窗口

以上设置将窗口A置于另一进程的窗口B上层，并将窗口B设置为禁用。

如果窗口A需要窗口反馈动画（反馈动画可以是模态，也可以是阴影，见我之前的水文《WPF window 子窗口反馈效果（抖动/阴影渐变)》）