private void ReceiveData(object userState)
{
TcpUser user = (TcpUser)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(250);
}
//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)
{
RemoveUser(user);
}
break;
}
AsyncSendToClient(user, receiveString);
}
}
/// <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(250);
}
//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
TcpUser user = new TcpUser(newClient);
Thread threadReceive = new Thread(ReceiveData);
threadReceive.Start(user);
userList.Add(user);
}
else
{
break;
}
}
}
/// <summary>
/// 接收客户端发来的信息
/// </summary>
/// <param name="user"></param>
/// <param name="receiveMessage"></param>
private void ReceiveMessage(TcpUser user, out string receiveMessage)
{
try
{
receiveMessage = user.br.ReadString();
}
catch (Exception ex)
{
receiveMessage = null;
}
}
/// <summary>
/// 发送message给user
/// </summary>
/// <param name="user"></param>
/// <param name="message"></param>
private bool SendToClient(TcpUser 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);
user.bw.Flush();
return(true);
}
catch
{
return(false);
}
}
/// <summary>
/// 异步发送message给user
/// </summary>
/// <param name="user"></param>
/// <param name="message"></param>
private void AsyncSendToClient(TcpUser user, string message)
{
SendToClientDelegate d = new SendToClientDelegate(SendToClient);
IAsyncResult result = d.BeginInvoke(user, message, null, null);
while (result.IsCompleted == false)
{
if (isExit)
{
break;
}
Thread.Sleep(250);
}
d.EndInvoke(result);
}
/// <summary>
/// 移除用户
/// </summary>
/// <param name="user"></param>
private void RemoveUser(TcpUser user)
{
userList.Remove(user);
user.Close();
}
