C# 服务器没有';无法从列表中删除客户端
我有一个客户端服务器应用程序。C# 服务器没有';无法从列表中删除客户端,c#,sockets,client-server,listener,C#,Sockets,Client Server,Listener,我有一个客户端服务器应用程序。 服务器可以处理多个客户端连接 当我在客户端中单击Close按钮时,我希望它会断开连接,并从服务器表单中的客户端列表中删除 但是,它进入一个无限循环,这会导致客户机从表单的列表视图中删除,然后再次添加到表单的列表视图中 这是我的密码: RemoteBatcherClient表单: using System; using System.Collections.Generic; using System.ComponentModel; using System.Data
服务器可以处理多个客户端连接 当我在客户端中单击
Close
按钮时,我希望它会断开连接,并从服务器表单中的客户端列表中删除
但是,它进入一个无限循环,这会导致客户机从表单的列表视图中删除,然后再次添加到表单的列表视图中
这是我的密码:
RemoteBatcherClient表单:
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;
namespace RemoteBatcherClient
{
public partial class RemoteBatcherClientForm : Form
{
Socket clientSock;
public RemoteBatcherClientForm()
{
InitializeComponent();
clientSock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
}
private void connectBtn_Click(object sender, EventArgs e)
{
clientSock.Connect("127.0.0.1", 8);
MessageBox.Show("Connected");
}
private void sendBtn_Click(object sender, EventArgs e)
{
if (clientSock.Send(Encoding.Default.GetBytes(txtMsg.Text)) > 0)
{
MessageBox.Show("Data Sent");
}
}
private void closeBtn_Click(object sender, EventArgs e)
{
clientSock.Close();
clientSock.Dispose();
Close();
}
}
}
RemoteBatcherServer:
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;
namespace RemoteBatcherClient
{
public partial class RemoteBatcherClientForm : Form
{
Socket clientSock;
public RemoteBatcherClientForm()
{
InitializeComponent();
clientSock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
}
private void connectBtn_Click(object sender, EventArgs e)
{
clientSock.Connect("127.0.0.1", 8);
MessageBox.Show("Connected");
}
private void sendBtn_Click(object sender, EventArgs e)
{
if (clientSock.Send(Encoding.Default.GetBytes(txtMsg.Text)) > 0)
{
MessageBox.Show("Data Sent");
}
}
private void closeBtn_Click(object sender, EventArgs e)
{
clientSock.Close();
clientSock.Dispose();
Close();
}
}
}
Client.cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;
namespace RemoteBatcherServer
{
class Client
{
public string ID
{
get;
private set;
}
public IPEndPoint EndPoint
{
get;
private set;
}
Socket serverSock;
public Client(Socket accepted)
{
serverSock = accepted;
ID = Guid.NewGuid().ToString();
EndPoint = (IPEndPoint)serverSock.RemoteEndPoint;
serverSock.BeginReceive(new byte[] { 0 }, 0, 0, 0, callback, null);
}
void callback(IAsyncResult ar)
{
try
{
serverSock.EndReceive(ar);
byte[] receiveBuffer = new byte[8192];
int rec = serverSock.Receive(receiveBuffer, receiveBuffer.Length, 0);
if (rec < receiveBuffer.Length)
{
Array.Resize<byte>(ref receiveBuffer, rec);
}
if (Receieved != null)
{
Receieved(this, receiveBuffer);
}
serverSock.BeginReceive(new byte [] {0}, 0, 0, 0, callback, null);
}
catch (System.Exception ex)
{
Console.WriteLine(ex.Message);
Close();
if (Disconnected != null)
{
Disconnected(this);
}
}
}
public void Close()
{
serverSock.Close();
serverSock.Dispose();
}
public delegate void ClientReceievedHandler(Client sender, byte[] data);
public delegate void ClientDisconnectedHandler(Client sender);
public event ClientReceievedHandler Receieved;
public event ClientDisconnectedHandler Disconnected;
}
}
RemoteBatcherServerForm.cs:
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;
namespace RemoteBatcherServer
{
public partial class RemoteBatcherServerForm : Form
{
Listener listener;
public RemoteBatcherServerForm()
{
InitializeComponent();
listener = new Listener(8);
listener.SockeetAccepted += new Listener.SocketAcceptHandler(listenerSocketAccepted);
Load += new EventHandler(MainLoad);
}
void MainLoad(object sender, EventArgs e)
{
listener.Start();
}
void listenerSocketAccepted(Socket socket)
{
Client client = new Client(socket);
client.Receieved += new Client.ClientReceievedHandler(clientReceived);
client.Disconnected += new Client.ClientDisconnectedHandler(clientDisconnected);
Invoke((MethodInvoker)delegate
{
ListViewItem item = new ListViewItem();
item.Text = client.EndPoint.ToString();
item.SubItems.Add(client.ID);
item.SubItems.Add("XX");
item.SubItems.Add("XX");
item.Tag = client;
lstClients.Items.Add(item);
});
}
void clientReceived(Client sender, byte[] data)
{
Invoke((MethodInvoker)delegate
{
for (int i = 0; i < lstClients.Items.Count; i++)
{
Client client = lstClients.Items[i].Tag as Client;
if (client.ID == sender.ID)
{
lstClients.Items[i].SubItems[2].Text = Encoding.Default.GetString(data);
lstClients.Items[i].SubItems[3].Text = DateTime.Now.ToString();
break;
}
}
});
}
void clientDisconnected(Client sender)
{
Invoke((MethodInvoker)delegate
{
for (int i = 0; i < lstClients.Items.Count; i++)
{
Client client = lstClients.Items[i].Tag as Client;
if (client.ID == sender.ID)
{
lstClients.Items.RemoveAt(i);
break;
}
}
});
}
}
}
使用系统;
使用System.Collections.Generic;
使用系统组件模型;
使用系统数据;
使用系统图;
使用System.Linq;
使用系统文本;
使用System.Windows.Forms;
Net系统;
使用System.Net.Sockets;
命名空间RemoteBatcherServer
{
公共部分类RemoteBatcherServerForm:Form
{
倾听者;
公共RemoteBatcherServerForm()
{
初始化组件();
侦听器=新侦听器(8);
listener.SockeetAccepted+=新的listener.SocketAcceptHandler(listenerSocketAccepted);
Load+=新事件处理程序(MainLoad);
}
void MainLoad(对象发送器、事件参数)
{
listener.Start();
}
无效listenerSocketAccepted(套接字)
{
客户端=新客户端(套接字);
client.received+=新client.clientreceivedHandler(clientReceived);
client.Disconnected+=new client.ClientDisconnectedHandler(clientDisconnected);
调用((MethodInvoker)委托
{
ListViewItem=新建ListViewItem();
item.Text=client.EndPoint.ToString();
item.SubItems.Add(client.ID);
项目.子项目.添加(“XX”);
项目.子项目.添加(“XX”);
item.Tag=客户端;
lstClients.Items.Add(item);
});
}
void clientReceived(客户端发送方,字节[]数据)
{
调用((MethodInvoker)委托
{
对于(int i=0;i
有什么想法吗?除非我误解了你的代码,否则你似乎在混合同步和异步调用。我想你正在用你的serverSock无限期地阻塞。接听电话。请参阅:-“如果没有可读取的数据,则接收方法将阻塞,直到数据可用为止,除非使用Socket.ReceiveTimeout设置了超时值”
尝试检查是否已收到0字节。您可能还希望将receive调用替换为BeginReceive。这可能看起来有点混乱,因为您实际上希望继续重新调用BeginReceive,直到收到0字节,这表明另一端已关闭连接:
int i = serverSock.EndReceive(ar);
if (i > 0)
{
serverSock.BeginReceive(receiveBuffer, 0, receiveBuffer.Length, 0,
new AsyncCallback(callback), null);
}
else
{
serverSock.Close();
}
注意,您可以将null参数交换为传递的状态对象。您可以在客户端构造函数中的初始BeginReceive调用中执行此操作-这可能是传递缓冲区的更好方法,用某种状态类包装它。这里有一个快速答案:修改Client.cs
的无效回调(IAsyncResult ar)
方法以检查是否返回0(当客户端关闭时发生此情况):
void回调(IAsyncResult ar)
{
尝试
{
//添加这些行
if(serverSock.Available==0)
{
断开(这个);
返回;
}
serverSock.EndReceive(ar);
字节[]接收缓冲区=新字节[8192];
int rec=serverSock.Receive(receiveBuffer,receiveBuffer.Length,0);
if(rec
不会帮助您,但您在Listener.cs
-SockeeTacepted
中有一个输入错误。应SocketAccepted
。谢谢,我已修复了输入错误。
int i = serverSock.EndReceive(ar);
if (i > 0)
{
serverSock.BeginReceive(receiveBuffer, 0, receiveBuffer.Length, 0,
new AsyncCallback(callback), null);
}
else
{
serverSock.Close();
}
void callback(IAsyncResult ar)
{
try
{
//add these lines
if (serverSock.Available == 0)
{
Disconnected(this);
return;
}
serverSock.EndReceive(ar);
byte[] receiveBuffer = new byte[8192];
int rec = serverSock.Receive(receiveBuffer, receiveBuffer.Length, 0);
if (rec < receiveBuffer.Length)
{
Array.Resize<byte>(ref receiveBuffer, rec);
}
if (Receieved != null)
{
Receieved(this, receiveBuffer);
}
serverSock.BeginReceive(new byte[] { 0 }, 0, 0, 0, callback, null);
}
catch (System.Exception ex)
{
Console.WriteLine(ex.Message);
Close();
if (Disconnected != null)
{
Disconnected(this);
}
}
}