TCP,UDP 通讯的helper类

使用Tcp通讯，首先要启动tcp服务端监听客户端，客户端发送消息，服务端收到消息

1.服务端代码如下

public class TcpServerTest
{
public async Task BeginServerAsync()
{
TcpClient client = null;
NetworkStream stream = null;
byte[] buffer = null;
string receiveString = null;

IPAddress localIP = IPAddress.Parse("127.0.0.1");
int localPort = 11000;
TcpListener listener = new TcpListener(localIP, localPort);//用本地IP和端口实例化Listener
listener.Start();//开始监听
while (true)
{
client = await listener.AcceptTcpClientAsync();//接受一个Client
buffer = new byte[client.ReceiveBufferSize];
stream = client.GetStream();//获取网络流
stream.Read(buffer, 0, buffer.Length);//读取网络流中的数据
stream.Close();//关闭流
client.Close();//关闭Client

receiveString = Encoding.Default.GetString(buffer).Trim('\0');//转换成字符串
Console.WriteLine(receiveString);
}
}

2.TCPClient客户端代码如下

public class TcpClientTest
{

public void BeginClient()
{
string sendString = null;//要发送的字符串
byte[] sendData = null;//要发送的字节数组
System.Net.Sockets.TcpClient client = null;//TcpClient实例
NetworkStream stream = null;//网络流

IPAddress remoteIP = IPAddress.Parse("127.0.0.1");//远程主机IP
int remotePort = 11000;//远程主机端口

while (true)//死循环
{
sendString = Console.ReadLine();//获取要发送的字符串
sendData = Encoding.Default.GetBytes(sendString);//获取要发送的字节数组
client = new System.Net.Sockets.TcpClient();//实例化TcpClient
try
{
client.Connect(remoteIP, remotePort);//连接远程主机
}
catch (System.Exception ex)
{
Console.WriteLine("连接超时，服务器没有响应！");//连接失败
Console.ReadKey();
return;
}
stream = client.GetStream();//获取网络流
stream.Write(sendData, 0, sendData.Length);//将数据写入网络流
stream.Close();//关闭网络流
client.Close();//关闭客户端
}
}