object Reference Not set to and Intense of an Object in mv5

I am using repository pattern in mvc 5 I have created the ICountry Interface and clsCountry class when run the project and put a break point then _ICountry.listofCountry() throw the error "Object reference not send to an Instance". Any expert can tell me where i am wrong . I am using Database first approch and my db extension is .edmx

Model Countries

public int CountryID { get; set; }
public string CountryName { get; set; }

IcountryRepository

public interface ICountry {
List listofCountry();
}

clsCountryRepository

public class clsCountry: ICountry {
ECommercedbEntities _db;
public clsCountry(ECommercedbEntities db) {
_db = db;
}
public List < Countries > listofCountry() {
return _db.Countries.ToList();
}
}

Controller

public class AccountController: Controller {
ICountry _ICountry;
public AccountController(ICountry ICountry) {
_ICountry = ICountry;
}
[HttpGet] public ActionResult Registration() {
try {
List < Countries > listCountry = _ICountry.listofCountry();
ViewBag.CountryList = new SelectList(listCountry, "CountryID", "CountryName");
return View();
} catch (Exception ex) {
throw ex;
}
}
}

AppStart

public static class UnityConfig {
public static void RegisterComponents() {
var container = new UnityContainer();
container.RegisterType < ILogin, clsLogin > ();
container.RegisterType < ICountry, clsCountry > ();
DependencyResolver.SetResolver(new UnityDependencyResolver(container));
}
}

Global.asax

protected void Application_Start()
{
UnityConfig.RegisterComponents();
}

3 Replies

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Priyanka Jain6y ago
updated code please check
0
zeeshan akram6y ago
when put this code then this error appear ,we can not create object of abtract class. You can see in image.

0
Priyanka Jain6y ago
You should initial your Interface with below code,
public class AccountController : Controller {

ICountry _ICountry;

public AccountController(ICountry ICountry)
{
_ICountry = new clsCountry();
}
+1