Generics and typecasting

public class ObjectA{
    //..
}

public class ObjectB: ObjectA{
    //..
}

public abstract class ObjectAList<T>: List<T> where T: ObjectA {
    //..
    public void LoadData(ObjectAList aList){
       XYZ.Load(aList);
    }
}

public class ObjectBList: ObjectAList<ObjectB> {
    private _fObjectBList = new ObjectBList();
    public void AfterCreate(){
       LoadData(fObjectBList)
    }
}

but this doesnt work it is complaining something like can not convert ObjectB to ObjectA

Error 2 Argument '1': cannot convert from ObjectB' to 'ObjectAList<ObjectA>' ...

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Generics and typecasting

msheridan

Hi,

The code you have posted does not compile. Please post the correct code.

Cheers,

Nasha.

from eeks to geeks ......

you can catch me @ nam_shahathotmail.com or namratha1athotmail.com
johncharle
This code is exactly what I mean/ want to do can anyoine help me out
using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication1 {
class ObjectA {

}

class ObjectB: ObjectA {

}

class ObjectAList<T>: List<T> where T: ObjectA {
protected void SomeFunction(ObjectAList<ObjectA> aList) {
//Do something here withe the list
}
}

class ObjectBList: ObjectAList<ObjectB> {
private ObjectBList myList = new ObjectBList();

public void DoSomething() {
SomeFunction(myList);
}
}

class Program {
static void Main(string[] args) {

}
}
}
Flavio Roberto
I loaded the code into Snippet Compiler, and it looks like you'll need/want to change your SomeFunction method signature to:

protected void SomeFunction(ObjectAList<T> aList)
Generics and typecasting

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