C#实现循环发送电脑屏幕截图

 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.IO; using System.Net; using System.Net.Sockets; using System.Threading; namespace server { public partial class Form1 : Form { public Thread mythread; public int shu = 0; public Form1() { InitializeComponent(); //  CheckForIllegalCrossThreadCalls = false; 不需要 } public Socket nect(int port, string host) { IPAddress ip = IPAddress.Parse(host); IPEndPoint ipe = new IPEndPoint(ip, port); Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//创建一个Socket类 s.Bind(ipe);//绑定2000端口 s.Listen(0);//开始监听 Socket temp = s.Accept();//为新建连接创建新的Socket。 return temp; } public void look(object s) { Socket temp = (Socket)s; byte[] buffer = new byte[1024]; while (true) { try { MemoryStream ms = new MemoryStream(); // Thread.Sleep(1000); int end = 1; while (end != 0) { shu = temp.Receive(buffer, buffer.Length, 0);//从客户端接受信息 if (shu == 5) end = 0; else ms.Write(buffer, 0, 1024); } pictureBox1.Image = Bitmap.FromStream(ms); ms.Dispose(); } catch(System.ArgumentException  e) { } } } //开启 private void button1_Click(object sender, EventArgs e) { int port = 2000; string host = "127.0.0.1"; Socket temp = nect(port, host); mythread = new Thread(new ParameterizedThreadStart(look)); mythread.Start(temp); } } }

 using System; using System.Collections.Generic; using System.Linq; using System.IO; using System.Net; using System.Net.Sockets; using System.Drawing; using System.Windows.Forms; using System.CodeDom; using System.Drawing.Imaging; using System.Drawing.Design; using System.Text; using System.Threading; namespace client { class Program { static void Main(string[] args) { int port = 2000; string host = "127.0.0.1"; Socket c=connect(port, host); Bitmap bt = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height); Graphics g= Graphics.FromImage(bt); while(true)//循环发送截图 { MemoryStream ms = new MemoryStream(); g.CopyFromScreen(new Point(0, 0), new Point(0, 0), Screen.PrimaryScreen.Bounds.Size);//获取屏幕截图 Image mm = SaveJpg(bt,10);//设置图片清晰度 mm = GetWebImage(mm,360,240);//改变截屏图片大小 mm.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg); byte[] buffer = new byte[1024]; ms.Position = 0; int end = 1; while (end != 0) { end= ms.Read(buffer, 0, 1024);//end为零表示读取完毕 c.Send(buffer, buffer.Length, 0);//每次发送1024个字节 } string sendStr = "over!";//结束信息 byte[] bs = Encoding.ASCII.GetBytes(sendStr); c.Send(bs, bs.Length, 0);//发送测试信息 ms.Dispose(); } c.Close(); Console.ReadLine(); } public static Socket connect(int port, string host) { IPAddress ip = IPAddress.Parse(host); IPEndPoint ipe = new IPEndPoint(ip, port);//把ip和端口转化为IPEndPoint实例 Socket c = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//创建一个Socket Console.WriteLine("Conneting..."); try { c.Connect(ipe);//连接到服务器 return c; } catch { Thread.Sleep(1000); connect(port, host); return c; } } public static Image SaveJpg(Image image, long value)//设置图像质量1―100 { ImageCodecInfo icInfo = null; ImageCodecInfo[] infos = ImageCodecInfo.GetImageEncoders(); foreach (ImageCodecInfo info in infos) { if (info.MimeType == "image/jpeg") { icInfo = info; break; } } EncoderParameters ep = new EncoderParameters(2); ep.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, value);//质量，定义图片的清晰度 ep.Param[1] = new EncoderParameter(System.Drawing.Imaging.Encoder.Compression, (long)EncoderValue.CompressionLZW);//压缩，似乎无效果 return image; } public static Image GetWebImage(Image img, int p_Width, int p_Height)//改变图片大小 { Bitmap _Bitmap = new Bitmap(p_Width, p_Height); Graphics _Graphcis = Graphics.FromImage(_Bitmap); _Graphcis.DrawImage(img, 0, 0, p_Width, p_Height); _Graphcis.Dispose(); return _Bitmap; } } }