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//点击启动按钮后调用ListenClientConnect方法,此方法中用了一个死循环来监听客户端
/// <summary>
/// 监听客户端请求
/// </summary>
private void ListenClientConnect()
{
TcpClient newClient = null;
while (true)
{
ListenClientDelegate d = new ListenClientDelegate(ListenClient);
IAsyncResult result = d.BeginInvoke(out newClient, null, null);
//使用轮询方式来判断异步操作是否完成
while (result.IsCompleted == false)
{
if (isExit)
break;
Thread.Sleep(150);
}
//获取Begin 方法的返回值和所有输入/输出参数
d.EndInvoke(out newClient, result);
if (newClient != null)
{
//每接受一个客户端连接,就创建一个对应的线程循环接收该客户端发来的信息
User user = new User(newClient);
Thread threadReceive = new Thread(ReceiveData);
threadReceive.Start(user);
userList.Add(user);
Fun.WriteMsg(string.Format("[{0}]进入", newClient.Client.RemoteEndPoint));
Fun.WriteMsg(string.Format("当前连接用户数:{0}", userList.Count));
}
else
{
break;
}
}
}
private delegate void ListenClientDelegate(out TcpClient client);
/// <summary>
/// 接受挂起的客户端连接请求
/// </summary>
/// <param name="newClient"></param>
private void ListenClient(out TcpClient newClient)
{
try
{
newClient = myListener.AcceptTcpClient();
}
catch (Exception ex)
{
newClient = null;
Fun.WriteEx(ex, "ListenClient");
}
}
private void ReceiveData(object userState)
{
User user = (User)userState;
TcpClient client = user.client;
while (!isExit)
{
string receiveString = null;
ReceiveMessageDelegate d = new ReceiveMessageDelegate(ReceiveMessage);
IAsyncResult result = d.BeginInvoke(user, out receiveString, null, null);
//使用轮询方式来判断异步操作是否完成
while (!result.IsCompleted)
{
if (isExit)
break;
Thread.Sleep(150);
}
//获取Begin方法的返回值和所有输入/输出参数
d.EndInvoke(out receiveString, result);
if (receiveString == null)
{
if (!isExit)
{
Fun.WriteMsg(string.Format("与{0}失去联系,已终止接收该用户信息", client.Client.RemoteEndPoint));
RemoveUser(user);
}
break;
}
}
/// <summary>
/// 异步发送message给user
/// </summary>
/// <param name="user"></param>
/// <param name="message"></param>
public void AsyncSendToClient(User user, string message)
{
if (user == null) return;
SendToClientDelegate d = new SendToClientDelegate(SendToClient);
IAsyncResult result = d.BeginInvoke(user, message, null, null);
while (result.IsCompleted == false)
{
if (isExit)
break;
Thread.Sleep(150);
}
d.EndInvoke(result);
}
private delegate void SendToClientDelegate(User user, string message);
/// <summary>
/// 发送message给user
/// </summary>
/// <param name="user"></param>
/// <param name="message"></param>
private void SendToClient(User user, string message)
{
try
{
//将字符串写入网络流,此方法会自动附加字符串长度前缀
//user.bw.Write(message);
byte[] data = Encoding.UTF8.GetBytes(message);
user.bw.Write(data.Length);
//user.bw.Write(messageId);
user.bw.Write(data);
user.bw.Flush();
Fun.WriteMsg(string.Format("向[{0}]发送:{1}", user.client.Client.RemoteEndPoint, message));
}
catch (Exception ex)
{
//Fun.WriteEx(string.Format("向[{0}]发送信息失败", user.client.Client.RemoteEndPoint));
Fun.WriteEx(ex, "SendToClient");
}
}
/// <summary>
/// 移除用户
/// </summary>
/// <param name="user"></param>
private void RemoveUser(User user)
{
userList.Remove(user);
if (user.client != null)
{
user.client.Close();
}
user.Close();
Fun.WriteMsg(string.Format("当前连接用户数:{0}", userList.Count));
}
while (flag)
{
byte[] bytes = new byte[1024];
sock1.Receive(bytes, bytes.Length, 0);
string str = Encoding.ASCII.GetString(bytes);
richTextBox1.Text += "client:" + str + "\r\n";
}