Unable to resolve service for type while attempting to activate

by

For the Dependency Injection framework to resolve IRepository, it must first be registered with the container. For example, in ConfigureServices, add the following:

services.AddScoped<IRepository, MemoryRepository>();

For .NET 6+, which uses the new hosting model by default, add the following in Program.cs instead:

builder.Services.AddScoped<IRepository, MemoryRepository>();

AddScoped is just one example of a service lifetime:

For web applications, a scoped lifetime indicates that services are created once per client request (connection).

See the docs for more information on Dependency Injection in ASP.NET Core.

More Related Contents:

  1. Resolving instances with ASP.NET Core DI from within ConfigureServices
  2. ASP.NET Core Dependency Injection error: Unable to resolve service for type while attempting to activate
  3. Dependency Injection error: Unable to resolve service for type while attempting to activate, while class is registered
  4. Dependency injection, inject with parameters
  5. Dependency Injection with classes other than a Controller class
  6. How do you create a custom AuthorizeAttribute in ASP.NET Core?
  7. Increase upload file size in Asp.Net core
  8. How to read ASP.NET Core Response.Body?
  9. Timeouts with long running ASP.NET MVC Core Controller HTTPPost Method
  10. How to update values into appsetting.json?
  11. How do I access Configuration in any class in ASP.NET Core?
  12. Render Razor View to string in ASP.NET Core
  13. Hangfire – Multi tenant, ASP.NET Core – Resolving the correct tenant
  14. Unable to create migrations after upgrading to ASP.NET Core 2.0
  15. Convert IHtmlContent/TagBuilder to string in C#
  16. Inject service into Action Filter
  17. Async provider in .NET Core DI
  18. How to get user Browser name ( user-agent ) in Asp.net Core?
  19. Dependency injection resolving by name
  20. ASP.Net Core MVC – Client-side validation for custom attribute
  21. Replace service registration in ASP.NET Core built-in DI container?
  22. Serilog DI in ASP.NET Core, which ILogger interface to inject?
  23. How do I inject ASP.NET 5 (vNext) user-secrets into my own utility class?
  24. ASP.NET Core equivalent of ASP.NET MVC 5’s HttpException
  25. ASP.NET Core 3.0 [FromBody] string content returns “The JSON value could not be converted to System.String.”
  26. How should I manage DbContext Lifetime in MVC Core?
  27. ASP.NET Core HTTPRequestMessage returns strange JSON message
  28. MVC6 Dropdownlist of Countries
  29. Sharing Cookies Between Two ASP.NET Core Applications
  30. ASP.NET 5 Authorize against two or more policies (OR-combined policy)

Leave a Comment