"pantichd" <pantichd@firstenergycorp.com> wrote in message
news:ukxl9AKuEHA.3188@TK2MSFTNGP15.phx.gbl...
> Hello,
>
> I'm using a Component Class object to represent a database table. This
Data
> Access Object (DAO) has a connection object and data adapter object in it
> along with a bunch of methods that need to be there every time I create a
> new DAO to represent a db table.
>
> Instead of having to code that "common" logic for each new class I'd like
to
> create a base DAO, put the common logic there and inherit from it (instead
> of System.ComponentModel.Component) for each new DAO.
>
> My current steps for creating a new DAO are:
> 1) Create a new Component Class object
> 2) Drag the database from the Server Explorer onto the design pane. This
> creates the connection object to the db.
> 3) Drag a table from the database in Server Explorer onto the design pane.
> This creates the data adapter object for that table.
> 4) Create all the common methods in the new DAO
>
> Within an application, each DAO will have the exact same connection object
> so I'd like to include that in the base DAO.
>
> Thinking along those lines, I created a new DAO (call it BaseDAO) and did
> steps 1, 2 & 4 from above. Then I created another DAO (ChildDAO) that
> inherits from the BaseDAO. I was hoping that I would then be able to just
do
> step 3 from above for this new DAO.
>
> When I try to bring up the designer for ChildDAO I get the following
error:
>
> The designer could not be shown for this file because none of the
classes
> within it can be designed. The designer inspected the following classes
in
> the file:
>
> ChildDAO --- The base class 'LayerDataAccess.BaseDAO' could not be
> loaded. Ensure the assembly has been referenced or built if it is part of
> the project.
>
> Both the BaseDAO and ChildDAO objects are in the same project. Does anyone
> have any ideas what I'm doing wrong?
>
> Thanks in advance for any help.
>
> David.
>
>

"David Pantich" wrote:

> Yes, the base class compiled fine. So did the child class.
>
> The error happens when I try to open the Designer on the child class.
>
> Thanks!
>
>
>
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