winform 进程间通信、模态显示窗口

来源：互联网发布：展开windows文件卡住了编辑：程序博客网时间：2024/06/05 10:15

一：在运行的主程序需要位置去启动一个进程

       Process proc = new Process();      proc.StartInfo.FileName = @"D:\MyCode\WindowsFormsApplication2\WindowsFormsApplication1\bin\Debug\Test1.exe";      proc.StartInfo.Arguments = "lb:bb bb:100,300,4400";//参数       proc.Start();

二：要启动的程序操作（模态显示窗体）

Test1.exe的 Main函数方法如下

        /// <summary>        /// 应用程序的主入口点。        /// </summary>        [STAThread]        static void Main(string[] args)        {            OpenApplicationContext app = new OpenApplicationContext(args);            Application.Run(app);//public static void Run(ApplicationContext context);        }

OpenApplicationContext 是继承自ApplicationContext 的一个，这个里面可以实现对参数的处理、打开指定窗口，部分代码如下

    public class OpenApplicationContext : ApplicationContext    {        public OpenApplicationContext(string[] args)        {            if (args.Length > 1)            {                if (args[0].Contains("bb"))//打开webbrowser报表                {                    string[] paras = args[1].Substring(3).Split(',');                    ReportParasModel model = new ReportParasModel();                    model.Height = int.Parse(paras[2]);                    model.Width = int.Parse(paras[3]);                    model.LinkUrl = paras[4];                    model.Name = paras[5];                    ReportWeb rw = new ReportWeb(model);                    rw.ShowInTaskbar = false;                    rw.StartPosition = FormStartPosition.Manual;                    rw.Left = int.Parse(paras[0]);                    rw.Top = int.Parse(paras[1]);                    Process[] proces = Process.GetProcessesByName("PT4MainFrame");//获取进程                    if (proces.Length != 0)                    {                        IntPtr hwnd = proces[0].MainWindowHandle;                        rw.BringToFront();                        rw.Show(new WindowWrapper(hwnd));  //也可以用ShowDialog(new WindowWrapper(hwnd));                    }               } else if (args[0].Contains("wf"))//打开Winform报表                   {                   //省略                   }            }        }    }

new WindowWrapper(hwnd)); 是一个继承自IWin32Window的类，代码如下

    public class WindowWrapper : System.Windows.Forms.IWin32Window    {        public WindowWrapper(IntPtr handle)        {            _hwnd = handle;        }        public IntPtr Handle        {            get { return _hwnd; }        }        private IntPtr _hwnd;    }

三：实现进程间通信（共享内存方法）

在主程序里添加API

        const int WM_COPYDATA = 0x004A;        [DllImport("User32.dll", EntryPoint = "FindWindow")]        private static extern int FindWindow(string lpClassName, string lpWindowName);        [DllImport("User32.dll", EntryPoint = "SendMessage")]        private static extern int SendMessage(            int hWnd, // handle to destination window               int Msg, // message                int wParam, // first message parameter                  ref COPYDATASTRUCT lParam // second message parameter              );        public struct COPYDATASTRUCT        {            public IntPtr dwData;            public int cbData;            [MarshalAs(UnmanagedType.LPStr)]            public string lpData;        }

主程序方调用方法给指定进程窗口穿参数,部分代码

private void contractMenu_OnItemClick{   int WINDOW_HANDLER = FindWindow(null, @"HwReportWeb");//HwReportWeb 为窗体上标题Text值    if (WINDOW_HANDLER != 0)//存在该窗体    {    //height,width,url,name        string paras = height + "," + width + "," + url +","+ name;        byte[] sarr = System.Text.Encoding.Default.GetBytes(paras);        int len = sarr.Length;        COPYDATASTRUCT cds;        cds.dwData = (IntPtr)100;        cds.lpData = paras;        cds.cbData = len + 1;        SendMessage(WINDOW_HANDLER, WM_COPYDATA, 0, ref cds);    }}

主程序调用端已经完成，下面就是新打开的进程窗体接收这些消息，部分代码如下

        const int WM_COPYDATA = 0x004A;        public struct COPYDATASTRUCT        {            public IntPtr dwData;            public int cbData;            [MarshalAs(UnmanagedType.LPStr)]            public string lpData;        }        protected override void WndProc(ref Message m)        {            switch (m.Msg)            {                case WM_COPYDATA:                    COPYDATASTRUCT mystr = new COPYDATASTRUCT();                    Type mytype = mystr.GetType();                    mystr = (COPYDATASTRUCT)m.GetLParam(mytype);                    string[] paras = mystr.lpData.Split(',');                    //height,width,url,name                    ReportParasModel paraModel = new ReportParasModel();                    paraModel.Height = int.Parse(paras[0]);                    paraModel.Width = int.Parse(paras[1]);                    paraModel.LinkUrl = paras[2];                    paraModel.Name = paras[3];                    ReloadUrl(paraModel);                    this.BringToFront();                    break;                default:                    base.WndProc(ref m);                    break;            }        }

至此，进程通信完成。

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