C#局域网TCP桌面监控，客户端不明原因卡死。

Question

局域网tcp远程控制C#窗体应用程序

Answer 1

服务器端：
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.Net;
using System.Net.Sockets;
using System.IO;
using System.Threading;namespace Server
{
    public partial class Server : Form
    {
        public Server()
        {
            InitializeComponent();
        }        private void Server_Load(object sender, EventArgs e)
        {        }        Thread MainThread;
        Thread ScreenThread;
        Socket socket;        [System.Runtime.InteropServices.DllImport("gdi32.dll")]
        private static extern bool BitBlt(
            IntPtr hdcDest, //目标设备的句柄
            int nXDest, //目标对象的左上角x坐标
            int nYDest, //目标对象的左上角Y坐标
            int nWidth, //目标对象的矩形宽度
            int nHeight,    //目标对象的矩形长度
            IntPtr hdcSrc,  //源设备的句柄
            int nXSrc,  //源对象的左上角x坐标
            int nYSrc,  //源对象的左上角y坐标
            System.Int32 dwRop  //光栅的操作值
            );        [System.Runtime.InteropServices.DllImport("gdi32.dll")]
        private static extern IntPtr CreateDC(
            string lpszDriver,  //驱动名称
            string lpszDevice,  //设备名称
            string lpszOutput,  //无用，设为null
            IntPtr lpInitData   //任意的打印机数据
            );        //获取Server的IP地址
        public static IPAddress GetServerIP()
        {
            IPHostEntry ieh = Dns.GetHostEntry(Dns.GetHostName());
            return ieh.AddressList[0];
        }        //监听 端口：8888
        private void BeginListen()
        {
            IPAddress ServerIp = GetServerIP();
            IPEndPoint iep = new IPEndPoint(ServerIp, 8888);
            socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            socket.Bind(iep);
            while (true)
            {
                try
                {
                    socket.Listen(10);
                    byte[] CommandData = new byte[2];
                    Socket newSocket = socket.Accept();
                    newSocket.Receive(CommandData);
                    string command = Encoding.Default.GetString(CommandData);
                    //判断命令
                    if (command == "00")//屏幕监控开启
                    {
                        ScreenSend();
                    }
                    else if (command == "01")
                    {
                        ScreenThread.Abort();//屏幕监控关闭
                    }
                }
                catch (System.Exception er)
                {
                }
            }
        }        //屏幕图像传输
        private void ScreenSend()
        {
            IPAddress ServerIp = GetServerIP();
            IPEndPoint iep = new IPEndPoint(ServerIp, 9999);
            socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            socket.Bind(iep);            while (true)
            {
                try
                {
                    socket.Listen(5);
                    Socket ScreenSocket = socket.Accept();
                    ScreenTimer.Enabled = true;
                }
                catch { }
            }
        }        //屏幕监控
        private void ScreenMonitor()
        {
            /*Screen scr = Screen.PrimaryScreen;
          Rectangle rc = scr.Bounds;
          int iWidth = rc.Width;
          int iHeight = rc.Height;
          Size mySize = new Size(rc.Width, rc.Height);
          Image bitmap = new Bitmap(iWidth, iHeight);          Graphics g = Graphics.FromImage(bitmap);
          g.CopyFromScreen(0,0,0,0,mySize);          bitmap.Save(@"c:/1.jpg");*/            IntPtr dc1 = CreateDC("DISPLAY", null, null, (IntPtr)null);
            //创建显示器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
            Image 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);
            IntPtr dc3 = g1.GetHdc();
            //获得屏幕的句柄
            IntPtr dc2 = g2.GetHdc();
            //获得位图的句柄
            BitBlt(dc2, 0, 0, Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, dc3, 0, 0, 13369376);
            //Bitblt(源场景,0,0,位图信息.位图宽度,位图信息.位图高度,桌面句柄,0,0,13369376) PS:SRCCOPY 13369376 将源矩形图象直接复制到目标矩形上
            g1.ReleaseHdc(dc3);
            //释放屏幕句柄
            g2.ReleaseHdc(dc2);
            //释放位图句柄
            MyImage.Save("C:/MyJpeg.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);            MemoryStream ms = new MemoryStream();
            MyImage.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
            byte[] bytes = ms.GetBuffer();
            ms.Close();
            socket.Send(bytes);
        }        //屏幕定时器
        private void ScreenTimer_Tick(object sender, EventArgs e)
        {
            ScreenMonitor();
        }        //开启监听进程 BeginListen
        private void StartServer_Click(object sender, EventArgs e)
        {
            try
            {
                MainThread = new Thread(new ThreadStart(BeginListen));
                MainThread.Start();
            }
            catch (System.Exception er)
            {
            }
        }        //关闭所有进程
        private void StopServer_Click(object sender, EventArgs e)
        {
            socket.Close();
            MainThread.Abort();
        }
    }
}
我刚刚开始研究着做，希望大家能多多帮助我~

Answer 2

第二个窗口没用线程，这里就卡死了   while (true)
            {
                try
                {
                    socket.Connect(iep);
 
                    byte[] bytePicture = new byte[300 * 1024];
                    socket.Receive(bytePicture);
 
                    MemoryStream ms = new MemoryStream(bytePicture);
                    Image bm = Image.FromStream(ms);
                    ms.Close();
                    pictureBox1.Image = bm;
                }
                catch { }
            }

Answer 3

楼主你需的是这个
http://download.csdn.net/detail/fengart/173494 看他的原码你就知了。他有你所需的全部功能。。还是加强版哦

Answer 4

draw code 128c source .net

Answer 5

silverlight很少人用了，有一些“安全”方面的坑拦住了许多人。silverlight访问tcp服务器，要注意两点：
1. 要提供 943 端口安全认证。
2. 服务器端口必须在 4502-4534 之间。其实这两点还不算变态，最变态的（也是微软最混蛋的）地方是，如果有问题，那么silverlight直接以“死机”作为对待，而不是给用户报告一个确定的异常信息。我实在想不明白为什么微软为什么会这样设计，这明显是想让自己的产品死掉的节奏啊？！