// 用户登录、记录、通知所有人
public void Login(string name)
{
OperationContext context = OperationContext.Current;
IChatServerCallback callback = context.GetCallbackChannel <IChatServerCallback>();
ChatUser user = new ChatUser(name, callback);
// 不允许用户名重复的登录
if (ChatService.users.ContainsKey(name))
{
user.callback.LoginState(false);
return;
}
// 添加进在线列表
ChatService.users.Add(name, user);
// 分发广播消息
DeliverSystemMessageToAll(name, "进入聊天室");
// 分发在线用户列表
DeliverUserList();
user.callback.LoginState(true);
return;
}
public ChatUser(string username, IChatServerCallback callback)
{
this.username = username;
this.callback = callback;
}
