Access inherited member

Question

I have this LoanWithClient Model that inherits from Loan:

public class LoanWithClient : Loan
{
    public Client Client { get; set; }
}

How can I access the entire inherited Loan object without having to explicitly write its properties?

LoanWithClient does not contain a definition for Loan

return new LoanWithClient
{
     **Loan** = loan, //The Loan is erroring: LoanWithClient does not contain a definition for Loan
     Client = client
};

Class Loan:

public class Loan
{
    public int ID { get; set; }
    public string Address { get; set; }
    public string City { get; set; }
    //etc..
}

I think you may have misunderstood what "inheritance" means. It means that the derived class (`LoanWithClient`) takes on the features (methods, properties, etc.) of its parent (`Loan`). If neither `LoanWithClient` nor `Loan` have a property `Loan`, then you won't be able to use it when constructing an instance. If `Loan` has an `Amount` property, you can use this directly as you do with `Client`. — ProgrammingLlama, Jan 07 '19 at 07:13
Create a constructor and call the base-class constructor from it. See e.g. https://stackoverflow.com/questions/12051/calling-the-base-constructor-in-c-sharp — DodgyCodeException, Jan 07 '19 at 07:22
Also, your object model looks a bit suspicious. Is address really a property of a loan? — DodgyCodeException, Jan 07 '19 at 07:23
Perhaps you're looking for [the decorator pattern?](https://stackoverflow.com/questions/2707401/understand-the-decorator-pattern-with-a-real-world-example) (see also: [decorator pattern Wikipedia page](https://en.wikipedia.org/wiki/Decorator_pattern)) — ProgrammingLlama, Jan 07 '19 at 07:26
Don't mix up *is-a* and *has-a*. `LoanWithClient` *is* a `Loan`. It doesn't *have* a `Loan`. — Damien_The_Unbeliever, Jan 07 '19 at 07:27

score 5 · Accepted Answer · answered Jan 07 '19 at 07:25

The class LoanWithClient inherits from Loan. Which means that the child class have all the properties of parent class. But this doesn't mean that the child class contains a parent class as a property. You can write the class like this-

public class Loan
{
    public int ID { get; set; }
    public string Address { get; set; }
    public string City { get; set; }
    //etc..
}

public class LoanWithClient
{
    public Loan Loan { get; set; }
    public Client Client { get; set; }
}

return new LoanWithClient
{
     Loan = loan,
     Client = client
};

If you want to keep your class architecture, you can return like the below way-

return new LoanWithClient
{
     ID = loan.ID,
     Address = loan.Address,
     City = loan.City,
     //etc..
     Client = client
};

score 4 · Answer 2 · answered Jan 07 '19 at 07:23

4

You want to

Access inherited member

Loan is not a member, it's the parent. Access Loan's members like this:

return new LoanWithClient
{
     ID = loan.ID,
     Address = loan.Address,
     City = loan.City,
     //etc...
     Client = client
};

answered Jan 07 '19 at 07:23

shingo

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Access inherited member

2 Answers2