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POST /Server HTTP/1.1
Content-Type: application/json
Content-Length: 59

{"cmd":"StartTask","data":"Sendemich","tid":"00002"}					

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System.Net.Sockets.TcpClient clientSocket = new System.Net.Sockets.TcpClient();
// clientSocket.Connect("127.0.0.1", 80);

clientSocket.Connect(txt_host.Text.ToString(), Convert.ToInt32(txt_port.Text));

string txt = listNameListe.Text.ToString();

                
string get_menu_request = "{\"cmd\":\"StartTask\",\"data\":\"" + txt + "\"}";

NetworkStream serverStream = clientSocket.GetStream();
byte[] outStream = System.Text.Encoding.ASCII.GetBytes(get_menu_request);
serverStream.Write(outStream, 0, outStream.Length);
serverStream.Flush();

byte[] inStream = new byte[10025];
//  serverStream.Read(inStream, 0, (int)clientSocket.ReceiveBufferSize);
string _returndata = System.Text.Encoding.ASCII.GetString(inStream);