我有一个功课来构建一个应用程序,它将在服务器和客户端之间发送和接收简单的字符串.我知道如何建立连接,但不知道如何发送和接收字符串.这是我的代码：
public partial class Form1 : Form
{
private Thread n_server;
private Thread n_client;
private Thread n_send_server;
private TcpClient client;
private TcpListener listener;
private int port = 2222;
private string IP = " ";
private Socket socket;
public Form1()
{
InitializeComponent();
}
private void exitToolStripMenuItem_Click(object sender,EventArgs e)
{
Application.Exit();
}
public void Server()
{
listener = new TcpListener(IPAddress.Any,port);
listener.Start();
try
{
socket = listener.AcceptSocket();
if (socket.Connected)
{
textBox2.Invoke((MethodInvoker)delegate { textBox2.Text = "Client : " + socket.RemoteEndPoint.ToString(); });
}
}
catch
{
}
}
public void Client()
{
IP = "localhost";
client = new TcpClient();
try
{
client.Connect(IP,port);
}
catch (Exception ex)
{
MessageBox.Show("Error : " + ex.Message);
}
if (client.Connected)
{
textBox3.Invoke((MethodInvoker)delegate { textBox3.Text = "Connected..."; });
}
}
private void button1_Click(object sender,EventArgs e)
{
n_server = new Thread(new ThreadStart(Server));
n_server.IsBackground = true;
n_server.Start();
textBox1.Text = "Server up";
}
private void button2_Click(object sender,EventArgs e)
{
n_client = new Thread(new ThreadStart(Client));
n_client.IsBackground = true;
n_client.Start();
}
private void send()
{
// I want to use this method for both buttons : "send button" on server side and "send button"
// on client side. First I read text from textBox2 on server side or textBox3
// on client side than accept and write the string to label2(s) or label3(c).
//
}
private void button3_Click(object sender,EventArgs e)
{
n_send_server = new Thread(new ThreadStart(send));
n_send_server.IsBackground = true;
n_send_server.Start();
}
}
解决方法
以下代码从服务器发送并接收当前的日期和时间
//以下代码适用于服务器应用程序：
namespace Server
{
class Program
{
const int PORT_NO = 5000;
const string SERVER_IP = "127.0.0.1";
static void Main(string[] args)
{
//---listen at the specified IP and port no.---
IPAddress localAdd = IPAddress.Parse(SERVER_IP);
TcpListener listener = new TcpListener(localAdd,PORT_NO);
Console.WriteLine("Listening...");
listener.Start();
//---incoming client connected---
TcpClient client = listener.AcceptTcpClient();
//---get the incoming data through a network stream---
NetworkStream nwStream = client.GetStream();
byte[] buffer = new byte[client.ReceiveBufferSize];
//---read incoming stream---
int bytesRead = nwStream.Read(buffer,client.ReceiveBufferSize);
//---convert the data received into a string---
string dataReceived = Encoding.ASCII.GetString(buffer,bytesRead);
Console.WriteLine("Received : " + dataReceived);
//---write back the text to the client---
Console.WriteLine("Sending back : " + dataReceived);
nwStream.Write(buffer,bytesRead);
client.Close();
listener.Stop();
Console.ReadLine();
}
}
}
//这是客户端的代码
namespace Client
{
class Program
{
const int PORT_NO = 5000;
const string SERVER_IP = "127.0.0.1";
static void Main(string[] args)
{
//---data to send to the server---
string textToSend = DateTime.Now.ToString();
//---create a TCPClient object at the IP and port no.---
TcpClient client = new TcpClient(SERVER_IP,PORT_NO);
NetworkStream nwStream = client.GetStream();
byte[] bytesToSend = ASCIIEncoding.ASCII.GetBytes(textToSend);
//---send the text---
Console.WriteLine("Sending : " + textToSend);
nwStream.Write(bytesToSend,bytesToSend.Length);
//---read back the text---
byte[] bytesToRead = new byte[client.ReceiveBufferSize];
int bytesRead = nwStream.Read(bytesToRead,client.ReceiveBufferSize);
Console.WriteLine("Received : " + Encoding.ASCII.GetString(bytesToRead,bytesRead));
Console.ReadLine();
client.Close();
}
}
}
