关于TCP/IP通信（GPRS—DTU通信）

     最近部门需要做一个GPRS/CDMA数据传送的程序，主要为完成数据的传输。其实说起来实现应该很简单，监听本机8000端口，建立连接后接收发送数据。

这个主要是测试连接，并能发送接收数据部分代码：

 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 TCPReceiveData{ public partial class TCPReceive : Form { private TcpListener listener; private TcpClient client=new TcpClient(); private Thread thThreadread;//创建线程，用以侦听端口号，接受信息 public TCPReceive() { InitializeComponent(); } private void TcpTimeServer() { int portNum = 8000; bool done = false; TcpListener listener = new TcpListener(portNum); listener.Start(); TcpClient client = listener.AcceptTcpClient(); NetworkStream ns = client.GetStream(); while (!done) { byte[] byteTime = Encoding.ASCII.GetBytes(DateTime.Now.ToString()); byte[] buff=new byte[1000]; try { if (client==null) { client = listener.AcceptTcpClient(); ns = client.GetStream(); } ns.Write(byteTime, 0, byteTime.Length); //向listbox添加新项，发送部分 UpdateListBoxText(System.Text.Encoding.ASCII.GetString(byteTime)); ns.Read(buff, 0, buff.Length); //向listbox添加新项，接收部分 UpdateListBoxText(System.Text.Encoding.ASCII.GetString(buff)); } catch (Exception e) { Console.WriteLine(e.ToString()); } } client.Close(); listener.Stop(); } //跨线程操作TextBox控件委托 delegate void SetListBoxCallback(string byteTime); private void UpdateListBoxText(string byteTime) { if (this.ReceiveLB.InvokeRequired) { SetListBoxCallback m_SetListBoxCallBack = new SetListBoxCallback(UpdateListBoxText); this.BeginInvoke(m_SetListBoxCallBack, new object[] { byteTime }); } else { this.ReceiveLB.Items.Add(byteTime); } } }}

 

能发送并接收到数据；发送为当前时间，接收部分为远程接收到的信息。