求教一个关于Socket断开的问题
这是个简易的多人聊天室后台。
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.Threading;
using System.Net;
using System.Net.Sockets;
namespace Server
{
public partial class Form1 : Form
{
delegate void ListBoxAddItemDelegate(String s);
ListBoxAddItemDelegate listBoxAddItemDelegate;
private IPEndPoint serverEndPoint;
private Socket socket;
private List<Socket> clientSockets;
private Thread listen;
private byte[] buffer;
public Form1()
{
InitializeComponent();
listBoxAddItemDelegate = new ListBoxAddItemDelegate(listBoxAddItem);
}
private void Form1_Load(object sender, EventArgs e)
{
buffer=new byte[65535];
clientSockets = new List<Socket>();
listen=new Thread(listenClient);
IPHostEntry local = Dns.GetHostByName(Dns.GetHostName());
MessageBox.Show(local.AddressList[0].ToString());
serverEndPoint = new IPEndPoint(local.AddressList[0], 21368);
socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
socket.Bind(serverEndPoint);
socket.Listen(10);
listen.Start();
}
private void listenClient()
{
while (true)
{
clientSockets.Add(socket.Accept());
Socket aClient=clientSockets.Last();
aClient.BeginReceive(buffer, 0, buffer.Length, SocketFlags.None, new AsyncCallback(catchClient), aClient);
clientListBox.Invoke(listBoxAddItemDelegate, aClient.RemoteEndPoint.ToString()+" 现人数:"+ clientSockets.Count);
}
}
private void catchClient(IAsyncResult ar)
{
Socket client = (Socket)ar.AsyncState;
int read = client.EndReceive(ar);
boardCast(buffer, read);
try
{
client.BeginReceive(buffer, 0, buffer.Length, SocketFlags.None, new AsyncCallback(catchClient), client);
}
catch
{
}
}
private void boardCast(byte[] buffer,int size)
{
foreach (Socket myClient in clientSockets)
{
try
{
if (myClient.Connected)
{
myClient.Send(buffer, 0, size, SocketFlags.None);
}
}
catch
{
listBoxAddItem("Lost a Client! IP:" + myClient.RemoteEndPoint.ToString());
}
}
}
private void listBoxAddItem(String s){
if (clientListBox.InvokeRequired)
{
clientListBox.Invoke(listBoxAddItemDelegate, s);
}
else
{
clientListBox.Items.Add(s);
}
}
private void Form1_Closing(object sender, FormClosingEventArgs e)
{
listen.Abort();
socket.Close();
}
}
}
当客户端强行关闭后,下一次服务器广播消息，当循环到断开链接的Client就会报错。
然后服务器提示有Client断开。
现在我想实现的是，当循环到断开链接的Client报错后，从clientSockets(Socket的List)中删除那个出错的Client。
于是我把广播函数改成了：
private void boardCast(byte[] buffer,int size)
{
List<Socket> delArray = new List<Socket>();
//遍历发送数据
foreach (Socket myClient in clientSockets)
{
try
{
if (myClient.Connected)
{
myClient.Send(buffer, 0, size, SocketFlags.None);
}
}
catch
{
listBoxAddItem("Lost a Client! IP:" + myClient.RemoteEndPoint.ToString());
delArray.Add(myClient);
}
}
//删除断开的Socket
foreach (Socket myClient in delArray)
{
clientSockets.Remove(myClient);
}
}
结果出现：
集合已修改；可能无法执行枚举操作。
错误指向foreach (Socket myClient in clientSockets)的in
求解一般什么情况才会出现上述错误? --------------------编程问答-------------------- socket还没有完全关闭？ 这个我也不懂 同问！
我出的问题是socket client连接出错断开后自己重新连接可是就是连接不上！一直抱同样的错误，如果重启下客户端就好了！
补充：.NET技术 , C#
