For asp.net framework:
The difference is that you should have your controller like this, no need to inject dependency:
public class HomeController : Controller { IApiService _apiService; public HomeController() : this(new ApiService()) { } public HomeController(IApiService apiService) { _apiService = apiService; } public string getString(string name) { string a = _apiService.CheckOut(name); return a; } }
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Please allow me to show a sample here, asp.net core.
My Controller:
public class HomeController : Controller { private readonly IApiService _apiService; public HomeController( IApiService iapiService) { _apiService = iapiService; } public string getString(string name) { string a = _apiService.CheckOut(name); return a; } }
My interface:
namespace WebMvcApp.Services { public interface IApiService { public string CheckOut(string str); } }
My implement of the interface:
namespace WebMvcApp.Services { public class ApiService: IApiService { public string CheckOut(string str) { return "hello : " + str; } } }
I inject the dependency in startup.cs -> ConfigureServices method:
public void ConfigureServices(IServiceCollection services) { services.AddControllersWithViews(); services.AddScoped<IApiService, ApiService>(); }
or in .net 6 in Program.cs file:
builder.Services.AddControllersWithViews(); builder.Services.AddScoped<IApiService, ApiService>();
IApiService? Did you add dependency injection configuration in startup.cs?