问在ASP.NET MVC中使用ASP.NET核心IServiceCollection

EN

    protected void Application_BeginRequest(object sender, EventArgs e)
    {
        Context.Items.Add("serviceScope", Startup.Provider.CreateScope());
    }

    protected void Application_EndRequest(object sender, EventArgs e)
    {
        var serviceScope = Context.Items["serviceScope"] as IServiceScope;
        serviceScope?.Dispose();
    }

public class DotNetCoreDependencyResolver : IDependencyResolver
{
    private readonly IServiceProvider _serviceProvider;
    private readonly IDependencyResolver _oldDependencyResolver;

    public DotNetCoreDependencyResolver(IServiceProvider serviceProvider, 
        IDependencyResolver oldDependencyResolver)
    {
        _serviceProvider = serviceProvider;
        _oldDependencyResolver = oldDependencyResolver;
    }

    public object GetService(Type serviceType)
    {
        var serviceScope = HttpContext.Current.Items["serviceScope"] as IServiceScope;
        return serviceScope?.ServiceProvider?.GetService(serviceType)
            ?? _serviceProvider.GetService(serviceType) 
            ?? _oldDependencyResolver.GetService(serviceType);
    }

    public IEnumerable<object> GetServices(Type serviceType) 
        => _oldDependencyResolver.GetServices(serviceType);
}

 Provider = services.BuildServiceProvider();
 DependencyResolver.SetResolver(new DotNetCoreDependencyResolver(Provider, DependencyResolver.Current));