我试图创建一个应用程序来创建两个客户端（两个表单应用程序）之间的绑定，以通过TCP协议传输一些数据。我使用System.Net.Sockets在C＃中编写了应用程序（我是System.Net的初学者），我收到了这个错误：
System.Net.Sockets.SocketException（0x80004005）：连接尝试失败，因为连接方在一段时间后没有正确响应，或者建立的连接失败，因为连接的主机未能在系统响应192.168.2.101:100 Client.003.Form1上System.Net.Sockets.Socket.Connect（IPAddress地址，Int32端口）的System.Net.Sockets.Socket.Connect（EndPoint remoteEP）上的.Net.Sockets.Socket.DoConnect（EndPoint endPointSnapshot，SocketAddress socketAddress） .LoopConnect（）
我必须说这在我的机器上运行良好，另一个在路由器上与我绑定。
这是服务器的代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;
namespace Server_003
{
class Program
{
private static List<Socket> _clientSockets = new List<Socket>();
private static List<string> _numeClient = new List<string>();
private static List<int> _indexPartener = new List<int>();
private static byte[] _buffer = new byte[10000];
private static Socket _serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
static void Main(string[] args)
{
SetUpServer();
Console.ReadLine();
}
private static void SetUpServer()
{
//byte[] test = Encoding.ASCII.GetBytes("lose partener");
//Console.WriteLine(test.Length);
Console.WriteLine("Seting up server ... ");
_serverSocket.Bind(new IPEndPoint(IPAddress.Parse("192.168.2.101"), 100));
_serverSocket.Listen(5);
_serverSocket.BeginAccept(new AsyncCallback(AcceptCallBack), null);
}
private static string GetNume()
{
int index = 0;
if (_numeClient.Count == 0)
return "Client 0";
else
for (int i = 0; i < _numeClient.Count; i++)
if (_numeClient[i] != "Client " + index.ToString())
return "Client " + index.ToString();
else
index++;
return "Client " + index.ToString();
}
private static void AcceptCallBack(IAsyncResult AR)
{
Socket socket = _serverSocket.EndAccept(AR); //return client socket
_clientSockets.Add(socket);
_indexPartener.Add(-1);
_numeClient.Add(GetNume());
Console.WriteLine("Client conected with IP: " + socket.RemoteEndPoint);
socket.BeginReceive(_buffer, 0, _buffer.Length, SocketFlags.None, new AsyncCallback(ReceiveCallBack), socket);
_serverSocket.BeginAccept(new AsyncCallback(AcceptCallBack), null); //permitem sa mai accepte clienti
}
private static string GetNumeClienti()
{
string clienti = "";
for (int i = 0; i < _numeClient.Count; i++)
if(_indexPartener[i] == -1)
clienti += i.ToString() + " " + _numeClient[i] + "\r\n";
return clienti;
}
private static string GetClientiPlusParteneri()
{
string clienti = "";
for (int i = 0; i < _numeClient.Count; i++)
if (_indexPartener[i] == -1)
clienti += _numeClient[i] + " Null\r\n";
else
clienti += _numeClient[i] + " " + _numeClient[_indexPartener[i]] + "\r\n";
return clienti;
}
private static void ReceiveCallBack(IAsyncResult AR)
{
Socket socket = (Socket)AR.AsyncState;
int index = _clientSockets.IndexOf(socket);
int receive = socket.EndReceive(AR);
byte[] DataBuffReceive = new byte[receive];
if (receive == 13)
_indexPartener[index] = -1;
else
if (_indexPartener[index] == -1)
{
Array.Copy(_buffer, DataBuffReceive, receive);
string text = Encoding.ASCII.GetString(DataBuffReceive);
string raspuns = "Invalid request!";
if (text.ToLower() == "get time")
{
raspuns = DateTime.Now.ToLongTimeString();
}
if (text.IndexOf(' ') > 0 && text.Substring(0, text.IndexOf(' ')) == "NuMe")
{
_numeClient[index] = text.Substring(text.IndexOf(' ') + 1);
raspuns = "Nume setat la " + _numeClient[index];
}
if (text.ToLower() == "get clienti liberi")
raspuns = GetNumeClienti();
if (text.ToLower() == "get clienti si parteneri")
raspuns = GetClientiPlusParteneri();
if (text.ToLower() == "e--")
{
raspuns = "Deconectat!";
_clientSockets.RemoveAt(index);
_numeClient.RemoveAt(index);
_indexPartener.RemoveAt(index);
return;
}
byte[] DataBuffSend = Encoding.ASCII.GetBytes(raspuns);
socket.BeginSend(DataBuffSend, 0, DataBuffSend.Length, SocketFlags.None, new AsyncCallback(SendCallBack), socket);
}
else
_clientSockets[index].BeginSend(DataBuffReceive, 0, DataBuffReceive.Length, SocketFlags.None, new AsyncCallback(SendCallBack), _clientSockets[index]);
socket.BeginReceive(_buffer, 0, _buffer.Length, SocketFlags.None, new AsyncCallback(ReceiveCallBack), socket);
}
private static void SendCallBack(IAsyncResult AR)
{
Socket socket = (Socket)AR.AsyncState;
socket.EndSend(AR);
}
}
}
这是客户端代码（表单应用程序）：
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.Threading;
namespace Client_003
{
public partial class Form1 : Form
{
private byte[] _buffer = new byte[10000];
private Socket _clientSoket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
private bool continuare = true;
public Form1()
{
InitializeComponent();
groupBox1.Text = "";
groupBox1.Visible = false;
}
private void LoopConnect()
{
if (_clientSoket.Connected)
MessageBox.Show("It's connected!");
else
{
while (!_clientSoket.Connected)
{
try
{
MessageBox.Show("Trying to connect!");
_clientSoket.Connect(IPAddress.Parse("192.168.2.101"), 100);
}
catch (Exception e)
{
MessageBox.Show(e.ToString());
}
}
}
textBox2.Clear();
textBox2.Text = "Connected!";
groupBox1.Visible = true;
}
private void primire()
{
if (continuare)
{
int rec = _clientSoket.Receive(_buffer);
byte[] data = new byte[rec];
Array.Copy(_buffer, data, rec);
string text = Encoding.ASCII.GetString(data);
if (text.IndexOf(' ') > 0 && text.ToLower().Substring(0, text.IndexOf(' ')) == "acceptare_partener")
{
DialogResult raspuns = MessageBox.Show("Acceptati ca partener pe " + text.Substring(text.IndexOf(' ') + 1), "Acceptare partener", MessageBoxButtons.YesNo);
if (raspuns == DialogResult.Yes)
{
byte[] cerere = Encoding.ASCII.GetBytes("yes");
_clientSoket.Send(cerere);
primire(); // expected confirmation
}
else
{
byte[] cerere = Encoding.ASCII.GetBytes("no");
_clientSoket.Send(cerere);
primire(); // expected confirmation
}
}
textBox2.Text += "\r\n" + text;
}
}
private void button1_Click(object sender, EventArgs e)
{
LoopConnect();
}
private void button2_Click(object sender, EventArgs e)
{
byte[] cerere = Encoding.ASCII.GetBytes(textBox1.Text);
_clientSoket.Send(cerere);
textBox1.Clear();
primire();
}
private void button3_Click(object sender, EventArgs e)
{
this.Close();
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (_clientSoket.Connected)
{
continuare = false;
byte[] cerere = Encoding.ASCII.GetBytes("e--");
_clientSoket.Send(cerere);
_clientSoket.Close();
}
}
}
}