WebAug 22, 2024 · make your singleton service IDisposable, inject IServiceProvider, create and store an IServiceScope scope using the IServiceProvider.CreateScope () extension method, use that scope to create the the scoped service you need, dispose the service scope in the Dispose method. WebMar 17, 2024 · Enable scope validation to make sure the app doesn't have singletons that capture scoped services. For more information, see Scope validation. Like all sets of …
Dependency injection guidelines - .NET Microsoft Learn
WebMar 8, 2024 · When you register implementations of IHostedService using any of the AddHostedService extension methods - the service is registered as a singleton. There … WebDec 26, 2024 · 1 Answer. Sorted by: 10. IOptionsSnapshot is registered as a scoped service, which means you need to create a service scope and then resolve using that: using (var scope = provider.CreateScope ()) { var scopedProvider = scope.ServiceProvider; var test = scopedProvider.GetRequiredService> (); //... css layui
Using a Scoped service in a Singleton in an Asp.Net Core app
WebThe reason being when we add AddHostedService to the application or API the Service Instance gets added as SingleTon instance. As a good practice, EFCore DBContext should be set as a scoped instance. In fact, EFCore using AddDBContext lets you add a scoped instance of DBContext to be the default. The first thing we want to do, is add a few lines to the ConfigureServices method of our startup.cs. This first time around, all services will be singletons. Now, let’s load our page and refresh if a few times and see what the output is. The results of 3 page refreshes look like so : So this makes sense. A singleton is one … See more So there is a little bit of code setup before we start explaining everything. The first thing we need is a “Child” service : The reason we have a property here called “CreationCount” is because later on we are going to test if a … See more The interesting thing about ASP.NET Core catching you from making a mistake when a scoped instance is within a singleton, is that the same … See more WebApr 16, 2024 · It's dangerous to resolve a scoped service from a singleton. It may cause the service to have incorrect state when processing subsequent requests. But in your case this is not the issue. Actually you are not resolving the scoped service from singleton. Its just getting an instance of scoped service from singleton whenever it requires. earl of sandwich downtown la