Errors subclassing BusinessListBase

bgilbert posted on Monday, May 07, 2007

Hi,
I've created subclasses for BusinessBase and BusinessListBase, however, I'm having databinding issues with the list class. This is my class signature:

Serializable()> _
Public MustInherit Class MyBusinessListBase( _
        Of T As MyBusinessListBase(Of T, C), _
        C As BusinessBase(Of C))
    Inherits BusinessListBase(Of T, C)
    Implements ITypedList

Does this look correct? My primary purpose at this point is the implementation of the ITypedList.

This compiles just fine, but when I try to create a datasource from it and assign it to the DataSource property of a BindingSource, I get an error:
"BindingSource unable to create list based on the Type specified in the DataSource property."

Thanks for any insights.
Barry

bgilbert replied on Monday, May 07, 2007

I just found out that if I add a public constructor to the class that inherits from this list class, it seems to work. I guess it's a reasonab;e workaround, but I don't entirely understand why this is necessary.

Barry