asp.net dependency injection code example

Example 1: c# dependancy

public interface ICustomerDataAccess
{
    string GetCustomerName(int id);
}

public class CustomerDataAccess: ICustomerDataAccess
{
    public CustomerDataAccess() {
    }

    public string GetCustomerName(int id) {
        return "Dummy Customer Name";        
    }
}

public class DataAccessFactory
{
    public static ICustomerDataAccess GetCustomerDataAccessObj() 
    {
        return new CustomerDataAccess();
    }
}

public class CustomerBusinessLogic
{
    ICustomerDataAccess _custDataAccess;

    public CustomerBusinessLogic()
    {
        _custDataAccess = DataAccessFactory.GetCustomerDataAccessObj();
    }

    public string GetCustomerName(int id)
    {
        return _custDataAccess.GetCustomerName(id);
    }
}

Example 2: register all services microsoft .net core dependency injection container

service.RegisterAssemblyPublicNonGenericClasses(… your assembly ref goes here …)
.Where(x => x.Name.EndsWith(“Service”))  //optional
.IgnoreThisInterface<IMyInterface>()     //optional
.AsPublicImplementedInterfaces(ServiceLifetime.Scoped);