ASP.NET core background service to send data through signalR

Question

I'm using signalR to send data to clients from server. What I want to is check data in the table(MSSQL DB) and send the related data to clients through signalR. So I want to create some background service to check database and send data.

I planned to use

System.Threading.Thread.Sleep(3000);

with

while(true) 

loop. How can I create service class to run this method in startup.

Is there any method to use do this task in standard way??

Answer 1

You can use an IHostedService and IHubContext to accomplish this.

See the doc on background services with ASP.NET Core:

https://learn.microsoft.com/en-us/aspnet/core/fundamentals/host/hosted-services?view=aspnetcore-2.1

See the doc on IHubContext:

https://learn.microsoft.com/en-us/aspnet/core/signalr/hubcontext?view=aspnetcore-2.1

Here's an example of using both together:

https://github.com/davidfowl/UT3/blob/fb12e182d42d2a5a902c1979ea0e91b66fe60607/UTT/Scavenger.cs

And the wire up:

https://github.com/davidfowl/UT3/blob/fb12e182d42d2a5a902c1979ea0e91b66fe60607/UTT/Startup.cs#L46