问题
I can send message to all group in chat
return context.Clients.Group(sGrp).recieveNotification(message, user, chatid, uuid);
I can send message to all group in chat
return context.Clients.User(currentuser).seenyou(myname);
the problem when i send message to specific user in specific group is there is way to do this .
回答1:
The only way to send a message to a specific user is by addressing the user by its connection Id. In this case it doesn't matter if he is in a specific group or not. Other than that there's no such thing as a built-in list, that you can iterate on, you need to manage those references by yourself.
Of course, if the desired user is the sender, you can use Clients.Caller.
来源：https://stackoverflow.com/questions/34381104/how-can-i-send-message-to-specific-user-in-specific-group-using-asp-net-signalr