你好,我试图建立一个连接两台电脑的连接。在本地代码中,下面的代码可以正常工作,但是当我们在另一台PC中启动客户端代码时,我们无法连接。代码如下。错误在哪里?
客户端:
void Start()
{
Debug.Log(string.Format("Starting TCP and UDP clients on port {0}...", 90));
udpThread = new Thread(new ThreadStart(ClientThread));
udpThread.Start();
}
void ClientThread()
{
try
{
// Establish the remote endpoint
// for the socket. This example
// uses port 11111 on the local
// computer.
IPHostEntry ipHost = Dns.GetHostEntry(Dns.GetHostName());
string strHostName = "";
strHostName = System.Net.Dns.GetHostName();
IPHostEntry ipEntry = System.Net.Dns.GetHostEntry(strHostName);
IPAddress addr = ipEntry.AddressList[0];
IPAddress addr2 = ipEntry.AddressList[1];
IPEndPoint localEndPoint = new IPEndPoint(addr, 90);
// Creation TCP/IP Socket using
// Socket Class Costructor
Socket sender = new Socket(addr.AddressFamily,
SocketType.Stream, ProtocolType.Tcp);
try
{
sender.Connect(localEndPoint);
Console.WriteLine("Socket connected to -> {0} ",
sender.RemoteEndPoint.ToString());
byte[] messageSent = Encoding.ASCII.GetBytes("Test Client<EOF>");
int byteSent = sender.Send(messageSent);
byte[] messageReceived = new byte[1024];
int byteRecv = sender.Receive(messageReceived);
Console.WriteLine("Message from Server -> {0}",
Encoding.ASCII.GetString(messageReceived,
0, byteRecv));
sender.Shutdown(SocketShutdown.Both);
sender.Close();
}
catch (ArgumentNullException ane)
{
Console.WriteLine("ArgumentNullException : {0}", ane.ToString());
}
catch (SocketException se)
{
Console.WriteLine("SocketException : {0}", se.ToString());
}
catch (Exception e)
{
Console.WriteLine("Unexpected exception : {0}", e.ToString());
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
和服务器端
private void Form1_Load(object sender, EventArgs e)
{
Console.WriteLine(string.Format("Starting TCP and UDP servers on port {0}...", port));
devices_battery_midlow_pic_1.Visible = false;
devices_battery_low_pic_1.Visible = false;
devices_battery_midhigh_pic_1.Visible = false;
devices_battery_high_pic_1.Visible = false;
play_button.Anchor = (AnchorStyles.Bottom);
Console.WriteLine(DateTime.Now.ToString() + " Getting IP...");
IPHostEntry ipHostInfo = Dns.GetHostEntry(Dns.GetHostName());
IPAddress ipAddress = ipHostInfo.AddressList[0];
connection_id_label.Text = "This IP:\n" + ipAddress.MapToIPv4().ToString();
Console.WriteLine(DateTime.Now.ToString() + " Starting Connection Thread...");
connectionThread = new Thread(new ThreadStart(StartServer));
connectionThread.IsBackground = true;
connectionThread.Start();
}
private void StartServer()
{
string strHostName = "";
strHostName = System.Net.Dns.GetHostName();
IPHostEntry ipEntry = System.Net.Dns.GetHostEntry(strHostName);
IPAddress addr = ipEntry.AddressList[0];
Console.WriteLine(addr.MapToIPv4().ToString() + " Starting Connection Thread...");
IPEndPoint localEndPoint = new IPEndPoint(addr, 90);
Socket listener = new Socket(addr.AddressFamily,
SocketType.Stream, ProtocolType.Tcp);
try
{
listener.Bind(localEndPoint);
listener.Listen(10);
while (true)
{
Console.WriteLine("Waiting connection ... ");
Socket clientSocket = listener.Accept();
// Data buffer
byte[] bytes = new Byte[1024];
string data = null;
Console.WriteLine("Text received -> {0} ", data);
byte[] message = Encoding.ASCII.GetBytes("Test Server");
clientSocket.Send(message);
clientSocket.Shutdown(SocketShutdown.Both);
clientSocket.Close();
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
可以在一台PC上运行,但是如果将服务器代码移到另一台PC上,我们将无法做出任何响应。错误在哪里?
最佳答案
客户端代码显式连接到同一台计算机上的服务器。而不是调用Dns.GetHostName()
,您应该使用可配置值(例如命令行参数)或读取配置文件。
关于c# - C#套接字编程错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/58952414/