Question

I use class Echo derived from PersistentConnection, and I want to send a message to certain connection:

var client = GlobalHost.ConnectionManager.GetConnectionContext<Echo>();
client.Connection.Broadcast(msg);

But I want to send it to specific connection ID. Do I have to create a group for every connection or start using Hubs, or there is a simpler way to select connection by ID, something like:

GetConnectionById(id).Send(msg);

?

Answer 1

Message can be sent to a specific connection ID, but the syntax is not same as what you specified in the question. Following snippet shows the syntax:

return Connection.Send(connectionId, Message);

Source of my answer: SignalR wiki on Github

I think, you are aware that SignalR 1 Alpha is released. It is possible to send message to a specific client by its ID if you use this version. Following snippet shows it:

var connection = GlobalHost.ConnectionManager.GetConnectionContext<Echo>().Connection;
connection.Send(((Connection)connection).Identity, "Message to be sent");

Here, ((Connection)connection).Identity gives connection ID of the requesting client.