/// <summary>
/// 发送message给user
/// </summary>
/// <param name="user">指定发给哪个用户</param>
/// <param name="message">信息内容</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);
user.bw.Flush();
AddItemToListBox(string.Format("向[{0}]：{1}发送：{2}",user.userName, user.port, message));
}
catch
{
AddItemToListBox(string.Format("向[{0}]发送信息失败",user.userName,user.port));
}
}
/// <summary>移除用户</summary>
/// <param name="user">指定要删除的用户</param>
private void RemoveUser(User user)
{
userList.Remove(user);
user.Close();
AddItemToListBox(string.Format("当前连接用户数：{0}", userList.Count));
}
/// <summary>发送信息给所有客户</summary>
/// <param name="user">指定发给哪个用户</param>
/// <param name="message">信息内容</param>
private void SendToAllClient(User user, string message)
{
string command = message.Split(',')[0].ToLower();
if (command == "login")
{
for (int i = 0; i < userList.Count; i++)
{
SendToClient(userList[i], message);
if (userList[i].userName != user.userName)
{
SendToClient(user, "login," + userList[i].userName +","+ userList[i].port);
}
}
}
else if (command == "logout")
{
for (int i = 0; i < userList.Count; i++)
{
if (userList[i].userName != user.userName)
{
SendToClient(userList[i], message);
}
}
}
}
/// <summary>接收客户端连接</summary>
private void ListenClientConnect()
{
TcpClient newClient = null;
while (true)
{
try
{
newClient = myListener.AcceptTcpClient();
}
catch
{
//当单击“停止监听”或者退出此窗体时AcceptTcpClient()会产生异常
//因此可以利用此异常退出循环
break;
}
//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);
//客户端的端口号
user.port = newClient.Client.RemoteEndPoint.ToString().Split(':')[1];
Thread threadReceive = new Thread(ReceiveData);
threadReceive.Start(user);
userList.Add(user);
AddItemToListBox(string.Format("[{0}]进入", newClient.Client.RemoteEndPoint));
AddItemToListBox(string.Format("当前连接用户数：{0}", userList.Count));
}
}