c#进程间通信（Inter-Process Communication）

原文:c#进程间通信（Inter-Process Communication）

c#进程间通信（IPC, Inter-Process Communication）

接收端：

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Runtime.InteropServices;  //for  MarshalAs

namespace receive

{

    public partial class Receive : Form

    {

public Receive()

        {

            InitializeComponent();

        }

        protected override void DefWndProc(ref System.Windows.Forms.Message m)          //重构此函数接收数据

        {

            switch (m.Msg)

            {

                case Message.WM_TEST:  //确定类型后，处理数据

                     string  message = string.Format("收到消息！参数为：{0},{1},{2}", m.Msg, m.WParam, m.LParam);

                    label1.Text = message;

                    break;

                default:

                    base.DefWndProc(ref m);

                    break;

            }

        }

    }

    class Message

    {

        public const int USER = 0X0400;

        public const int WM_TEST = USER + ;

        public const int WM_MSG = USER + ;

    }

}

发送端：

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Runtime.InteropServices;  //for DllImport

namespace send

{

    public partial class Form1 : Form

    {

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

        private static extern int SendMessage(int hWnd, int msg, int wParam, int lParam);      //发送消息

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

        private static extern int FindWindow(string lpClassName, string lpWindowName);      //获取另一个进程的窗口句柄

        public Form1()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            int hWnd = FindWindow(null, @"Receive");

            SendMessage(hWnd, Message.WM_TEST, , );//参数1、窗口句柄。2 、消息类型。 3、数据1。 4、数据2

        }

    }

    class Message

    {

        public const int USER = 0X0400;

        public const int WM_TEST = USER + ;      //简单的数据传输类型，传两个整数。

        public const int WM_MSG = USER + ;

    }

}

比较复杂的字符串传输：

发送端：

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Runtime.InteropServices;  //for DllImport

namespace send

{

    public partial class Form1 : Form

    {

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

       // private static extern int SendMessage(int hWnd, int msg, int wParam, int lParam);       //发送消息

        private static extern int SendMessage(int hWnd, int msg, int wParam, ref COPYDATASTRUCT lParam);

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

        private static extern int FindWindow(string lpClassName, string lpWindowName);      //获取另一个进程的窗口句柄

        const int WM_COPYDATA = 0x004A;

        public Form1()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            int hWnd = FindWindow(null, @"Receive");

            string message = "你好消息成功发送！";

            int i = message.Length;

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

            COPYDATASTRUCT cds;

            cds.dwData = (IntPtr);

            cds.lpData = message;

            cds.cbData = sarr.Length+;         //此值错误会引发接收端崩溃

            SendMessage(hWnd, WM_COPYDATA, , ref cds);

        }

    }

    public struct COPYDATASTRUCT

    {

        public IntPtr dwData;

        public int cbData;

        [MarshalAs(UnmanagedType.LPStr)]

        public string lpData;

    }

}

接收端：

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Runtime.InteropServices;  //for  MarshalAs

namespace receive

{

    public partial class Receive : Form

    {

        const int WM_COPYDATA = 0x004A;

        const int WM_MYSYMPLE = 0x005A;

        public Receive()

        {

            InitializeComponent();

        }

        protected override void DefWndProc(ref System.Windows.Forms.Message m)

        {

            switch (m.Msg)

            {

                case WM_COPYDATA:

                    COPYDATASTRUCT myStr = new COPYDATASTRUCT();

                    Type myType = myStr.GetType();

                    myStr = (COPYDATASTRUCT)m.GetLParam(myType);    //m中获取LParam参数以myType类型的方式，让后转换问结构体。

                    label1.Text = myStr.lpData;

                    break;

                default:

                    base.DefWndProc(ref m);

                    break;

            }

        }

    }

    public struct COPYDATASTRUCT

    {

        public IntPtr dwData;

        public int cbData;

        [MarshalAs(UnmanagedType.LPStr)]

        public string lpData;

    }

}

下载：链接：http://pan.baidu.com/s/1c0lWpt2 密码：yvzz

其他方法参考：

http://blog.csdn.net/feiren127/article/details/5459827

附：在程序中使用代码启动程序

using System.Diagnostics;   // for ProcessStartInfo

ProcessStartInfo startInfo = new ProcessStartInfo();

startInfo.FileName = @"C:\Users\dell\Documents\Visual Studio 2010\Projects\receive\receive\bin\Debug\receive.exe";

Process pro = new Process();

pro.StartInfo = startInfo;

pro.Start();        //开启

IntPtr hWnd = pro.MainWindowHandle;    //进程的句柄

pro.Kill();            //关闭

参考： http://blog.csdn.net/u011000290/article/details/48108557