窗口之间传递消息的一个方法

发送窗口的代码

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;

using System.Runtime.InteropServices;



namespace WpfSendMsg

{

    /// <summary>

    /// Interaction logic for Window1.xaml

    /// </summary>

    public partial class Window1 : Window

    {

        const int WM_COPYDATA = 0x004A;

        [DllImport("User32.dll", EntryPoint = "SendMessage")]

        private static extern int SendMessage(

            int hWnd, // handle to destination BR>            

            int Msg, // message

            int wParam, // first message parameter

            ref COPYDATASTRUCT lParam // second message parameter

        );



        [DllImport("User32.dll", EntryPoint = "FindWindow")]

        private static extern int Find(string lpClassName, string lpame);



        public Window1()

        {

            InitializeComponent();

            this.Title = "SentWindow";

        }



        private void btn1_Click(object sender, RoutedEventArgs e)

        {

            //int HANDLER = Findnull, @"欲发送程序窗口的标题");

            int HANDLER = Find(null, @"WindowGet");

            if (HANDLER != 0)

            {

                byte[] sarr = System.Text.Encoding.Default.GetBytes(tb1.Text);

                int len = sarr.Length;

                COPYDATASTRUCT cds;

                cds.dwData = (IntPtr)100;

                cds.lpData = tb1.Text;

                cds.cbData = len + 1;

                SendMessage(HANDLER, WM_COPYDATA, 0, ref cds);

            }

        }

    }



    public struct COPYDATASTRUCT

    {

        public IntPtr dwData;

        public int cbData;

        [MarshalAs(UnmanagedType.LPStr)]

        public string lpData;

    }

}

发送窗口的代码

 

如果接收窗口是wpf的窗口，代码如下：

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;

using System.Runtime.InteropServices;

using System.Windows.Interop;



namespace GetMsg

{

    /// <summary>

    /// Interaction logic for Window1.xaml

    /// </summary>

    public partial class Window1 : Window

    {

        const int WM_COPYDATA = 0x004A;



        public Window1()

        {

            InitializeComponent();

            this.Title = "WindowGet";

            SourceInitialized += AppWindow_SourceInitialized;

        }



        private void AppWindow_SourceInitialized(object sender, EventArgs e)

        {

            WindowInteropHelper helper = new WindowInteropHelper(this);



            HwndSource hwndSource = HwndSource.FromHwnd(helper.Handle);

            hwndSource.AddHook(new HwndSourceHook(WndProc));

            

        }





        IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)

        {

            int retVal = 0;

            handled = false;



            switch ((int)msg)

            {

                case WM_COPYDATA:

                    {

                        

                        try

                        {

                            COPYDATASTRUCT cp = (COPYDATASTRUCT)Marshal.PtrToStructure(lParam, typeof(COPYDATASTRUCT));

                            

                            tb1.Text = cp.lpData;

                        }

                        catch (Exception e)

                        {

                            System.Diagnostics.Debug.WriteLine(e.ToString());

                        }

                        handled = true;

                        retVal = 1;



                        break;

                    }

                default:

                    break;

            }



            return (IntPtr)retVal;

        }



        public struct COPYDATASTRUCT

        {

            public IntPtr dwData;

            public int cbData;

            [MarshalAs(UnmanagedType.LPStr)]

            public string lpData;

        }





    }

}

wpf接收窗口的代码

 

如果接收窗口是winform的窗口，代码如下：

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;

using System.Runtime.InteropServices;



namespace WpfSendMsg

{

    /// <summary>

    /// Interaction logic for Window1.xaml

    /// </summary>

    public partial class Window1 : Window

    {

        const int WM_COPYDATA = 0x004A;

        [DllImport("User32.dll", EntryPoint = "SendMessage")]

        private static extern int SendMessage(

            int hWnd, // handle to destination BR>            

            int Msg, // message

            int wParam, // first message parameter

            ref COPYDATASTRUCT lParam // second message parameter

        );



        [DllImport("User32.dll", EntryPoint = "FindWindow")]

        private static extern int Find(string lpClassName, string lpame);



        public Window1()

        {

            InitializeComponent();

            this.Title = "SentWindow";

        }



        private void btn1_Click(object sender, RoutedEventArgs e)

        {

            //int HANDLER = Findnull, @"欲发送程序窗口的标题");

            int HANDLER = Find(null, @"WindowGet");

            if (HANDLER != 0)

            {

                byte[] sarr = System.Text.Encoding.Default.GetBytes(tb1.Text);

                int len = sarr.Length;

                COPYDATASTRUCT cds;

                cds.dwData = (IntPtr)100;

                cds.lpData = tb1.Text;

                cds.cbData = len + 1;

                SendMessage(HANDLER, WM_COPYDATA, 0, ref cds);

            }

        }

    }



    public struct COPYDATASTRUCT

    {

        public IntPtr dwData;

        public int cbData;

        [MarshalAs(UnmanagedType.LPStr)]

        public string lpData;

    }

}

WinForm接收窗口的代码