I have two projects in my solution:
Project 1: "SignalRChat" (MVC) - Works fine
Project 2: "DatabaseWatcherService" Windows Service - Works fine
I'm trying to make a call to my SignalRChat Hub from my Windows Service and it doesn't appear to be working.
This is where I call my Hub from my windows service (https://github.com/SignalR/SignalR/wiki/Hubs#broadcasting-over-a-hub-from-outside-of-a-hub):
void PerformTimerOperation(object sender, EventArgs e)
{
eventLog1.WriteEntry("Timer ticked...");
var message = "test";
var context = GlobalHost.ConnectionManager.GetHubContext<SignalRChat.ChatHub>();
context.Clients.All.addNewMessageToPage(message);
}
I'm getting the following error when attempting to connect:
Message=The remote server returned an error: (500) Internal Server Error.
I'm trying to connect via var connection = new HubConnection("http://localhost:2129");
Port 2129 is what my MVC project is running on.
This will only work, as far as I am aware, when you are calling the hub from within the web application.
In order to interact with the hub from outside of the web application, e.g. from a Windows Service, you will need to take a look at the SignalR Client Hubs documentation
Add the following NuGet package to your project:
Microsoft.AspNet.SignalR.Client
Add the following statement to the top of your page:
using Microsoft.AspNet.SignalR.Client;
You would need to create a connection to the hub, and then start the connection.
In your hub you would then need to have a method for
AddNewMessageToPage
which accepts the hello world string and from here callClients.All.addNewMessageTopage(message)