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, // messageint wParam, // first message parameterref 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;}
}

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;}}
}

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, // messageint wParam, // first message parameterref 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;}
}