Inject dbcontext in IHostedService

Hello,

I am writting an ASP.Net MVC Core 2.0 application.

I want to run a background task. I have read some documentation about IHostedService. I have written a Batch class which implements IHostedService and i have add this in Startup.cs:

services.AddSingleton<IHostedService, Batch>();

It works great.

Now, i want to access database from my background task. So i have injected my DbContext in Batch Constructor.

When i run the web application, i get this error:

Unhandled Exception: System.InvalidOperationException: Cannot consume scoped service 'myDbContext' from singleton 'Microsoft.Extensions.Hosting.IHostedService'.

I have read a lot of threads and documentations. I have understood the DI cannot inject scoped service in singleton but i have tried everything. Nothing works !

Thanks for your help