C# 跨進程 設置窗口owner

窗口間跨進程通信

1. 發送方

    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);

    //發送信息
    [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);
        }
    }

還有一個PostMessage方法，和SendMessage類似。

2. 接收方

在winform中，不同進程間窗口通信

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

在WPF中，如何在倆個不同進程的窗口之間通信.

    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;
    }

傳遞具體的數據，可參考：http://www.360doc.com/content/18/0131/15/45112790_726705014.shtml

跨進程設置窗口owner，並禁用父窗口

 此跨進程案例中，以子窗口A與父窗口B為例

1. 獲取父窗口B的句柄

windowB的句柄Inptr,可以通過應用程序的名稱或者線程Id,獲取窗口的句柄。具體可參考 C# 通過進程名/進程Id 操作窗口 

注：客戶端之間如果有跨線程通信機制（局域網等），可以直接將父窗口B的句柄傳給另一進程的子窗口A

2. 設置子窗口A的owner

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

設置后，僅僅是顯示在父窗口B的上層。禁用父窗口見下~

3. 通過消息機制禁用父窗口

子窗口A彈出后，向父窗口B發送禁用窗口消息：

其中，消息值的定義，不能窗口自帶的消息值。窗口自帶的消息列表，可參考 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);
        }

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

父窗口監聽消息，並處理子窗口A發送的窗口禁用消息

    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. 跨進程的模態窗口

以上設置將窗口A置於另一進程的窗口B上層，並將窗口B設置為禁用。

如果窗口A需要窗口反饋動畫（反饋動畫可以是模態，也可以是陰影，見我之前的水文《WPF window 子窗口反饋效果（抖動/陰影漸變)》）