Question

C#中图片已经保存于Bitmap中,如何实现将其传送到指定IP地址的计算机上,并在指定计算机上建立窗口显示出来?

这个程序也只要实现局域网中传送就行了。由三个部分组成：第一是抓取屏幕；第二是建立发送，即服务器；第三是接受，即客户端，并将接受的图片在窗口中显示出来。

若以下回答无法解决问题，邀请你更新回答

Answer 1

关键性代码给你：
_client = _listener.AcceptTcpClient();

NetworkStream ns = _client.GetStream();
StreamReader sr = new StreamReader(ns);
BinaryWriter br = new BinaryWriter(ns);

Rectangle rect = Screen.PrimaryScreen.Bounds;

//获得桌面Graphics
Graphics g1 = Graphics.FromHwnd(GetDesktopWindow());

//得到桌面dc
IntPtr dc1 = g1.GetHdc();

Image image = new Bitmap(rect.Width, rect.Height);
Graphics g2 = Graphics.FromImage(image);
IntPtr dc2 = g2.GetHdc();

//截屏到image
BitBlt(dc2, 0, 0, rect.Width, rect.Height, dc1, 0, 0, 13369376);

g1.ReleaseHdc(dc1);
g2.ReleaseHdc(dc2);

//image类型转到二进制
byte[] b = ImageToByteArray(image);

//发送
br.Write(b, 0, b.Length);
br.Flush();

image.Dispose();

//ImageToByteArray函数
public byte[] ImageToByteArray(System.Drawing.Image imageIn)
{
MemoryStream ms = new MemoryStream();
imageIn.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
return ms.ToArray();
}

发送到客户端后再把二进制转成image类型，显示出来，
public Image ByteArrayToImage(byte[] byteArrayIn, int count)
{
MemoryStream ms = new MemoryStream(byteArrayIn, 0, count);
Image returnImage = Image.FromStream(ms);
return returnImage;
}

不懂发消息给我，

Answer 2

socket