C# IComparable with one parent and 2 children

Question

Well, I have a class Human that implement IComparable<Human>

Then I have two more classes that inherit from Human Child:Human and Cousin:Human

The Parent class has a property AGE that has in the getter a call to a function getAge() which is abstract.

I have a List of Humans and when I display them in a datagrid every age is calculated properly.

I want to sort the list using age as attribute so I make the Human abstract class to implement Icomparable and then the method like this.

public int CompareTo(Human other)
{
     return this.age.CompareTo(other.age);
}

I invoke the list.sort() method in the ASP like this

List<Human> hlist = instance.humanlist;
hlist.Sort();
tblHumans.DataSource = hlist;
tblHumans.DataBind();

The page loads with all the data but the items are not ordered by age, it seems ordered by position in the list.

My tblHumans is

<asp:GridView ID="tblHumans" runat="server">
</asp:GridView>

In the Parent class the attribute AGE is like this

public int Age
{
    get
    {
        return getAge();
    }

    set
    {
        age = getAge();
    }
}

getAge() is an abstract method that my child classes overrides

The calculation is returns values correctly, when the table is rendered every single value is there with the right results.

What I am doing wrong?

Answer 1

Ok, I fix it

thank you all for the time you took reading and answering this question.

At last I made this:

1) set again the age property and field with normal getter and setter 2) in the child class when I override the getAge method I force set the age too, so, when the compareTo is called in the sort method of the list the age property is populated so it is shown in the table.

I know it is not 'the best practic' but It has to be made this way because in this program I cannot use 'complex' data models (not even a database, but dont worry is not for a production system)

Thanks all again