[英]C# TCP Server to Multi Clients (Unknown number of clients listening)
我正在嘗試編寫一個由服務器和某些客戶端構建的小程序。 服務器將向客戶端傳輸/推送一條文本消息(不允許該客戶端發送回服務器,所有客戶端都應從服務器獲得相同的文本消息)我在這里看到了與此主題有關的一些問題,通過網絡,但沒有得到我正在尋找的確切解決方案。 大多數解決方案是為每個客戶端創建一個線程。 但是讓我們假設我並不總是知道在特定時間會有多少客戶在聽。 可以是2,也可以是30。我知道有一種方法可以創建一個線程池,並讓.NET處理線程分配,但是從來沒有很好的實踐,也沒有我對Threading的知識。 現在,我有一個簡單的Sever to Client程序,該程序可以按預期運行,但只能在一個客戶端上運行。 所以這是我的代碼:
服務器:
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Windows;
namespace NetMessageServerWpf
{
public partial class MainWindow : Window
{
TcpClient client;
public MainWindow()
{
InitializeComponent();
this.tcpListener = new TcpListener(IPAddress.Any, 3000);
this.listenThread = new Thread(new ThreadStart(ListenForClients));
this.listenThread.Start();
}
private void btnSend_Click(object sender, RoutedEventArgs e)
{
if(client == null || !client.Connected)
client = this.tcpListener.AcceptTcpClient();
msg = txtMessage.Text;
SendTCP(client);
}
public TcpListener tcpListener;
public Thread listenThread;
private string msg;
private void ListenForClients()
{
this.tcpListener.Start();
}
public void SendTCP(TcpClient tcpClient)
{
NetworkStream clientStream = tcpClient.GetStream();
ASCIIEncoding encoder = new ASCIIEncoding();
byte[] buffer = encoder.GetBytes(this.msg);
clientStream.Write(buffer, 0, buffer.Length);
clientStream.Flush();
}
}
}
客戶:
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
namespace NetClientSideWpf
{
class Client : Base
{
private string messageString;
public string MessageString
{
get { return messageString; }
set
{
messageString = value;
OnPropertyChanged("MessageString");
}
}
public Client()
{
ConnectToServer();
}
public void ConnectToServer()
{
TcpClient client = new TcpClient();
IPEndPoint serverEndPoint = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 3000);
client.Connect(serverEndPoint);
NetworkStream clientStream = client.GetStream();
Thread ServerThread = new Thread(new ParameterizedThreadStart(HandleClientComm));
ServerThread.Start(client);
}
private void HandleClientComm(object client)
{
TcpClient tcpClient = (TcpClient)client;
NetworkStream clientStream = tcpClient.GetStream();
byte[] message = new byte[4096];
int bytesRead;
while (true)
{
bytesRead = 0;
try
{
bytesRead = clientStream.Read(message, 0, 4096);
}
catch
{
break;
}
if (bytesRead == 0)
{
break;
}
ASCIIEncoding encoder = new ASCIIEncoding();
MessageString = encoder.GetString(message, 0, bytesRead);
}
}
}
}
任何幫助都可以! :)
我認為首先應該在應用程序的開頭啟動監聽器。 然后在間隔(Timer)中查找傳入的連接(TCPListener.Pending http://msdn.microsoft.com/de-de/library/system.net.sockets.tcplistener.pending(v=vs.110).aspx )如果獲得連接后,應將TCPClient保存在列表中。 在按鈕上單擊將消息發送給您的客戶。
我認為這不是最好的解決方案,但是它是沒有多線程的;-)
我編寫了一些示例代碼,希望對您有所幫助(未經測試):
public partial class MainWindow : Window
{
private TcpListener _server;
private List<TcpClient> _connectedClients;
public MainWindow()
{
InitializeComponent();
_server = new TcpListener(IPAddress.Any, 3000);
_connectedClients = new List<TcpClient>();
_server.Start();
DispatcherTimer timer = new DispatcherTimer();
timer.Interval = TimeSpan.FromSeconds(1); //every 1 sec!
timer.Tick += timer_Tick;
timer.Start();
}
private void SendMessage(string message)
{
ASCIIEncoding encoder = new ASCIIEncoding();
byte[] buffer = encoder.GetBytes(message);
foreach (var client in _connectedClients)
{
NetworkStream clientStream = client.GetStream();
clientStream.Write(buffer, 0, buffer.Length);
clientStream.Flush();
}
}
void timer_Tick(object sender, EventArgs e)
{
Debug.WriteLine("Tick");
Title = "hello";
if (_server.Pending())
{
_connectedClients.Add(_server.AcceptTcpClient());
}
}
}
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