C# 实现远程控制软件的关键技术

一、服务器端多线程Socket技术

  

用TcpListener进行侦听，接受客户端连接，有客户端连进来后开启处理线程处理数据，代码如下：

  

using System;
using System.Threading;
using System.Net.Sockets;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            // 在8888端口侦听
            TcpListener serverSocket = );
            TcpClient clientSocket = default(TcpClient);
            ;

            serverSocket.Start();
            Console.WriteLine(" >> " + "Server Started");

            counter = ;
            while (true)
            {
                counter += ;
                // 接受客户端连接
                clientSocket = serverSocket.AcceptTcpClient();
                Console.WriteLine(" >> " + "Client No:" + Convert.ToString(counter) + " started!");
                // 启动客户端处理代码
                handleClinet client = new handleClinet();
                client.startClient(clientSocket, Convert.ToString(counter));
            }

            clientSocket.Close();
            serverSocket.Stop();
            Console.WriteLine(" >> " + "exit");
            Console.ReadLine();
        }
    }

    // 客户端连接处理类
    public class handleClinet
    {
        TcpClient clientSocket;
        string clNo;

        public void startClient(TcpClient inClientSocket, string clineNo)
        {
            this.clientSocket = inClientSocket;
            this.clNo = clineNo;
            // 开启处理线程
            Thread ctThread = new Thread(doChat);
            ctThread.Start();
        }

        private void doChat()
        {
            ;
            ];
            string dataFromClient = null;
            Byte[] sendBytes = null;
            string serverResponse = null;
            string rCount = null;
            requestCount = ;

            while ((true))
            {
                try
                {
                    requestCount = requestCount + ;

                    // 读取内容
                    NetworkStream networkStream = clientSocket.GetStream();
                    networkStream.Read(bytesFrom, , (int)clientSocket.ReceiveBufferSize);
                    dataFromClient = System.Text.Encoding.ASCII.GetString(bytesFrom);
                    dataFromClient = dataFromClient.Substring(, dataFromClient.IndexOf("$"));
                    Console.WriteLine(" >> " + "From client-" + clNo + dataFromClient);

                    rCount = Convert.ToString(requestCount);
                    serverResponse = "Server to clinet(" + clNo + ") " + rCount;
                    sendBytes = Encoding.ASCII.GetBytes(serverResponse);
                    networkStream.Write(sendBytes, , sendBytes.Length);
                    networkStream.Flush();
                    Console.WriteLine(" >> " + serverResponse);
                }
                catch (Exception ex)
                {
                    Console.WriteLine(" >> " + ex.ToString());
                }
            }
        }
    }
}

  

二、鼠标控制技术

  

鼠标的控制用到了 mouse_event 这个API函数，参考代码如下：

  

using System;
using System.Threading;
using System.Runtime.InteropServices;
using System.Windows.Forms;

namespace MouseControl
{
    class MouseControl
    {
        /// <summary>
        /// 鼠标控制参数
        /// </summary>
        const int MOUSEEVENTF_LEFTDOWN = 0x2;
        const int MOUSEEVENTF_LEFTUP = 0x4;
        const int MOUSEEVENTF_MIDDLEDOWN = 0x20;
        const int MOUSEEVENTF_MIDDLEUP = 0x40;
        const int MOUSEEVENTF_MOVE = 0x1;
        const int MOUSEEVENTF_ABSOLUTE = 0x8000;
        const int MOUSEEVENTF_RIGHTDOWN = 0x8;
        const int MOUSEEVENTF_RIGHTUP = 0x10;

        /// <summary>
        /// 鼠标的位置
        /// </summary>
        public struct PONITAPI
        {
            public int x, y;
        }

        [DllImport("user32.dll")]
        public static extern int GetCursorPos(ref PONITAPI p);

        [DllImport("user32.dll")]
        public static extern int SetCursorPos(int x, int y);

        [DllImport("user32.dll")]
        public static extern int mouse_event(int dwFlags, int dx, int dy, int cButtons, int dwExtraInfo);

        [STAThread]
        static void Main()
        {
            PONITAPI p = new PONITAPI();
            GetCursorPos(ref p);
            Console.WriteLine("鼠标现在的位置X:{0}, Y:{1}", p.x, p.y);
            Console.WriteLine("Sleep 1 sec...");
            Thread.Sleep();

            p.x = (new Random()).Next(Screen.PrimaryScreen.Bounds.Width);
            p.y = (new Random()).Next(Screen.PrimaryScreen.Bounds.Height);
            Console.WriteLine("把鼠标移动到X:{0}, Y:{1}", p.x, p.y);
            SetCursorPos(p.x, p.y);
            GetCursorPos(ref p);
            Console.WriteLine("鼠标现在的位置X:{0}, Y:{1}", p.x, p.y);
            Console.WriteLine("Sleep 1 sec...");
            Thread.Sleep();

            Console.WriteLine("在X:{0}, Y:{1} 按下鼠标左键", p.x, p.y);
            mouse_event(MOUSEEVENTF_LEFTDOWN, p.x, p.y, , );
            Console.WriteLine("Sleep 1 sec...");
            Thread.Sleep();

            Console.WriteLine("在X:{0}, Y:{1} 释放鼠标左键", p.x, p.y);
            mouse_event(MOUSEEVENTF_LEFTUP, p.x, p.y, , );
            Console.WriteLine("程序结束，按任意键退出....");
            Console.ReadKey();
        }
    }
}

  

三、键盘控制技术

  

键盘的控制用到了 keybd_event 这个API函数，参考代码段如下：

  

[DllImport("user32.dll", EntryPoint = "keybd_event")]
public static extern void keybd_event(
     byte bVk,
     byte bScan,
     int dwFlags,
     int dwExtraInfo
);

keybd_event((, , );//按下F11
keybd_event((, );   //弹起F11

  

四、运行程序

4.1

  

public static void RunProcess(string name, string command)
{
     Process myProcess = new Process();

     myProcess.StartInfo.FileName = name;
     myProcess.StartInfo.Arguments = command;
     myProcess.Start();
     return;
}

  

4.2 运行CMD并取得命令执行结果

  

public static string RunCmd(string command)//运行一个cmd命令
{
     Process p = new Process();

     //p.StartInfo.WorkingDirectory = "c:\\";    // 工作目录
     p.StartInfo.FileName = "cmd.exe";           // 程序名
     p.StartInfo.Arguments = "/c " + command;    // 执行参数
     p.StartInfo.UseShellExecute = false;        // 关闭Shell的使用
     p.StartInfo.RedirectStandardInput = true;   // 重定向标准输入
     p.StartInfo.RedirectStandardOutput = true;  // 重定向标准输出
     p.StartInfo.RedirectStandardError = true;   // 重定向错误输出
     p.StartInfo.CreateNoWindow = true;          // 设置不显示窗口

     p.Start();   //启动

     //p.StandardInput.WriteLine(command);       // 也可以用这种方式输入要执行的命令
     //p.StandardInput.WriteLine("exit");        // 不过要记得加上Exit，要不然下一行执行的时候会出错

     return p.StandardOutput.ReadToEnd();        // 从输出流取得命令执行结果
}

  

五、取得屏幕拷贝

  

public Image GetScreen( )
{
     //this.Hide();
     IntPtr dc1 = CreateDC("DISPLAY", null, null, (IntPtr)null);
     //创建显示器的DC
     Graphics g1 = Graphics.FromHdc(dc1);
     //由一个指定设备的句柄创建一个新的Graphics对象
     Bitmap MyImage = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, g1);
     //根据屏幕大小创建一个与之相同大小的Bitmap对象
     Graphics g2 = Graphics.FromImage(MyImage);
     //获得屏幕的句柄
     IntPtr dc3 = g1.GetHdc();
     //获得位图的句柄
     IntPtr dc2 = g2.GetHdc();
     //把当前屏幕捕获到位图对象中
     BitBlt(dc2, , , Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, dc3, , , );
     //把当前屏幕拷贝到位图中
     g1.ReleaseHdc(dc3);
     //释放屏幕句柄
     g2.ReleaseHdc(dc2);
     //释放位图句柄
     return MyImage;
     //this.Show();
}

  

取得屏幕拷贝的代码直接用了bitmap格式，性能不高，在实际使用中应该考虑进行压缩。