Generics question

[Greg Bacchus]

Hi
I have a question that is difficult to explain so I'll use code
snippets to help me...
I have my object:

public abstract class MyTemplate<TKey>
{
public <TKey> Key;
}

public class MyObject : MyTemplate<int>
{
public string Code;
}

and I want to make a data access class that will return a specific one
of my objects given it's key. Something like this...

public class DataAccess<TObject> where TObject: MyTemplate
{
public <TObject> GetObject( <TKey> key )
{
// TODO: do stuff here;
return null;
}
}

My question is: given type TObject, is there any way of automatically
getting TKey without having to specify it in the declaration of
DataAccess??

Cheers
Greg Bacchus

 

[Daniel O'Connell [C# MVP]]

Hi
I have a question that is difficult to explain so I'll use code
snippets to help me...
I have my object:

public abstract class MyTemplate<TKey>
{
public <TKey> Key;
}

public class MyObject : MyTemplate<int>
{
public string Code;
}

and I want to make a data access class that will return a specific one
of my objects given it's key. Something like this...

public class DataAccess<TObject> where TObject: MyTemplate
{
public <TObject> GetObject( <TKey> key )
{
// TODO: do stuff here;
return null;
}
}

My question is: given type TObject, is there any way of automatically
getting TKey without having to specify it in the declaration of
DataAccess??

No. Your code here won't even work since you hae not defined a MyTemplate,
just a MyTemplate<T>.

The closest you could come would be

public class DataAccess<TObject, TKey> where TObject : MyTemplate<TKey>
{

}

if I understand what you mean, anyway.