Configuring Autofac with ASP.NET MVC 5 - asp.net-mvc

Question

I am trying to implement Dependency Injection with Autofac in an ASP.NET MVC5 Project. But I am getting the following error every time:
None of the constructors found with 'Autofac.Core.Activators.Reflection.DefaultConstructorFinder' on type 'MyProjectName.DAL.Repository` ........
My Autofac configuration code in App_Start folder as follows:
public static class IocConfigurator
{
public static void ConfigureDependencyInjection()
{
var builder = new ContainerBuilder();
builder.RegisterControllers(typeof(MvcApplication).Assembly);
builder.RegisterType<Repository<Student>>().As<IRepository<Student>>();
IContainer container = builder.Build();
DependencyResolver.SetResolver(new AutofacDependencyResolver(container));
}
}
In Global.asax file:
public class MvcApplication : HttpApplication
{
protected void Application_Start()
{
// Other MVC setup
IocConfigurator.ConfigureDependencyInjection();
}
}
Here is my IRepository:
public interface IRepository<TEntity> where TEntity: class
{
IQueryable<TEntity> GelAllEntities();
TEntity GetById(object id);
void InsertEntity(TEntity entity);
void UpdateEntity(TEntity entity);
void DeleteEntity(object id);
void Save();
void Dispose();
}
Here is my Repository:
public class Repository<TEntity> : IRepository<TEntity>, IDisposable where TEntity : class
{
internal SchoolContext context;
internal DbSet<TEntity> dbSet;
public Repository(SchoolContext dbContext)
{
context = dbContext;
dbSet = context.Set<TEntity>();
}
.....................
}
Here is my Student Controller:
public class StudentController : Controller
{
private readonly IRepository<Student> _studentRepository;
public StudentController()
{
}
public StudentController(IRepository<Student> studentRepository)
{
this._studentRepository = studentRepository;
}
....................
}
What's wrong in my Autofac Configuration..Any Help Please??

Answer 1

To inject a dependency you need to have satisfied all of the dependencies for all of the pieces down the chain.
In your case, the Repository constructor cannot be satisfied without a SchoolContext.
So in your registration add:
builder.RegisterType<SchoolContext>().InstancePerRequest();
See http://docs.autofac.org/en/latest/lifetime/instance-scope.html#instance-per-request