> I have a class that has a generic method that looks something like this:
>
> Public Sub Initialize(Of T As MyBusinessListBase(Of T, C), _
>             C As MyBusinessBase(Of C)) _
>             (ByRef dataSource As MyBusinessListBase(Of T, C), _
>             ByVal reportName As String, ByVal keyProperty As String, _
>             ByVal callBack As ReportChildCollectionCallback(Of T, C))
> ' Do stuff to initialize a reportViewer report...
> End Sub
>
> Later, this object raises an event. In that event handler, I want to invoke
> the callback routine passed into the Initialize method. I'm having trouble
> understanding how to store a reference to the callback routine at the class
> level so that I can use it in the event handler.

"Jon Skeet [C# MVP]" wrote:

> Barry Gilbert <BarryGilb***@discussions.microsoft.com> wrote:
> > I have a class that has a generic method that looks something like this:
> >
> > Public Sub Initialize(Of T As MyBusinessListBase(Of T, C), _
> >             C As MyBusinessBase(Of C)) _
> >             (ByRef dataSource As MyBusinessListBase(Of T, C), _
> >             ByVal reportName As String, ByVal keyProperty As String, _
> >             ByVal callBack As ReportChildCollectionCallback(Of T, C))
> > ' Do stuff to initialize a reportViewer report...
> > End Sub
> >
> > Later, this object raises an event. In that event handler, I want to invoke
> > the callback routine passed into the Initialize method. I'm having trouble
> > understanding how to store a reference to the callback routine at the class
> > level so that I can use it in the event handler.
>
> I don't "do" VB generic declarations, so I can't tell for sure if this
> is actually a generic method or just a method within a generic class.
> If it's a generic method, you'll have difficulties - you could store
> just a Delegate reference and use DynamicInvoke, but it would be better
> to make it strongly typed somehow - you may need to introduce an extra
> generic type, or parameterize the existing type further.
>
> It's hard to say without knowing more information, I'm afraid.
>
> --
> Jon Skeet - <sk***@pobox.com>
> http://www.pobox.com/~skeet   Blog: http://www.msmvps.com/jon.skeet
> If replying to the group, please do not mail me too
>

"Jon Skeet [C# MVP]" wrote:

> Barry Gilbert <BarryGilb***@discussions.microsoft.com> wrote:
> > Thanks for your reply.
> >
> > This is a generic method inside a User Control class. I considered making
> > the class generic, but I found that it's difficult (impossible?) to declare a
> > user control or form as generic. Am I right about this? I think this would
> > solve my problem.
>
> I've made a user control generic in the past, but then I've had to
> create a specific (non-generic) type derived from it in order to use
> it, e.g.
>
> public class WhizzyControl<T> : UserControl
> {
> .... Lots of implementation
> }
>
> public class Int32WhizzyControl : WhizzyControl<int>
> {
>    // No code whatsoever
> }
>
> That's worked fine for me, although I've only done it once. Would that
> help you?
>
> --
> Jon Skeet - <sk***@pobox.com>
> http://www.pobox.com/~skeet   Blog: http://www.msmvps.com/jon.skeet
> If replying to the group, please do not mail me too
>