C# 网络通信 异步 数据接收失败 高手过来帮我看看~
服务器端：using System;
using System.Collections.Generic;
using
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using
using
using System.Threading;
namespace 异步通信服务器
{
public partial class Form1 : Form
{
private Socket serversocket,clientsocket;
private const int dataSize=1024;
private byte[] data = new byte[dataSize];
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
this.button1.Enabled = false;
IPAddress ip = IPAddress.Parse("127.0.0.1");
IPEndPoint server = new IPEndPoint(ip, 8000);
serversocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
serversocket.Bind(server);
serversocket.Listen(10);
serversocket.BeginAccept(new AsyncCallback(AcceptConnection), serversocket);
}
private void AcceptConnection(IAsyncResult ar)
{
Socket oldServer = (Socket)ar.AsyncState;
//异步接受传入的连接，并创建新的Socket来处理远程主机通信
clientsocket = oldServer.EndAccept(ar);
MessageBox.Show("与客户建立连接！");
clientsocket.BeginReceive(data, 0, dataSize, SocketFlags.None, new AsyncCallback(ReceiveData), clientsocket);
}
private void ReceiveData(IAsyncResult ar)
{
Socket client = (Socket)ar.AsyncState;//client改成socketclient？？？
try//就是这里，接收失败，显示“等待新客户！”
{
int receiveDataLength = client.EndReceive(ar);
string str = System.Text.Encoding.Unicode.GetString(data, 0, receiveDataLength);
this.richTextBox1.Text = str;
clientsocket.BeginReceive(data, 0, dataSize, SocketFlags.None, new AsyncCallback(ReceiveData), clientsocket);//因为接收后还要继续准备接收，这样可以麽？？？
}
catch
{
client.Close();
MessageBox.Show("等待新客户！");
serversocket.BeginAccept(new AsyncCallback(AcceptConnection), serversocket);
}
}
private void button2_Click(object sender, EventArgs e)
{
try
{
serversocket.Close();
MessageBox.Show("停止监听！");
}
catch (Exception err)
{
MessageBox.Show(err.Message,"错误");
}
}
}
}
客户端：
using System;
using System.Collections.Generic;
using
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using
using
using System.Threading;
namespace 异步通信客户端
{
public partial class Form1 : Form
{
private Socket clientsocket;
private const int datasize = 1024;
private byte[] data = new byte[datasize];
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
IPAddress ip = IPAddress.Parse("127.0.0.1");
IPEndPoint server = new IPEndPoint(ip, 8000);
Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
socket.BeginConnect(server, new AsyncCallback(ConnectServer), socket);
}
private void ConnectServer(IAsyncResult ar)
{
clientsocket = (Socket)ar.AsyncState;
try
{
clientsocket.EndConnect(ar);
MessageBox.Show("与服务器连接成功！");
clientsocket.BeginReceive(data, 0, datasize, SocketFlags.None, new AsyncCallback(ReceiveData), clientsocket);
}
catch
{
MessageBox.Show("与服务器连接失败！");
}
}
private void ReceiveData(IAsyncResult ar)
{
try
{
Socket server = (Socket)ar.AsyncState;
int receiveDataLength = server.EndReceive(ar);
string str = System.Text.Encoding.Unicode.GetString(data, 0, receiveDataLength);
this.richTextBox1.Text = str;
}
catch
{ }
}
private void button2_Click(object sender, EventArgs e)
{
try
{
int bytes = 0;
Byte[] SendBytes = new Byte[256];
string SendString = "123#";
SendBytes = Encoding.ASCII.GetBytes(SendString.ToCharArray());
bytes = clientsocket.Send(SendBytes, SendBytes.Length, 0);
}
catch
{
MessageBox.Show("发送失败！");
}
}
private void button3_Click(object sender, EventArgs e)
{
try
{
clientsocket.Close();
MessageBox.Show("与服务器断开连接！");
}
catch
{
MessageBox.Show("连接尚未开始");
}
}
private void button4_Click(object sender, EventArgs e)
{
try
{
int bytes = 0;
Byte[] SendBytes = new Byte[256];
string SendString = "456#";
SendBytes = Encoding.ASCII.GetBytes(SendString.ToCharArray());
bytes = clientsocket.Send(SendBytes, SendBytes.Length, 0);
}
catch
{
MessageBox.Show("发送失败！");
}
}
}
}
