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Serious limitation of ObjectDataSourc e + DataObjectTypeN ame + DataSet as BusinessEntity

Hi fellas,

has anyone managed to get ObjectDataSourc e to work Datasets where the
Dataset is used as BusinessEntity class?

What I mean is the following architecture:

1.WebPage with ObjectDataSourc e
2. CustomBusinessO bject which
* does validation,
* uses a Strongly Typed DataTable as a collection of BusinessEntity
items
* forwards data access to DataAdapters as a data layer
3. DataLayer based on DataAdapters

Ideally I would like to use the DataObjectTypeN ame property of the
ObjectDataSourc e
so that the methods of the CustomBusinessO bject are with a single
parameter e.g.
Insert (Customer c);
The problem stems from the fact that the ObjectDataSouce requires the
BusinessEntity class (in this case this would be strongly typed data
row) should have a default constructor. Unfortunately, I could not
figure way of implementing a strongly typed data row with default
constructor.

Is there any way around this situation?

The only solution I could come up with so far is to not set the
DataObjectTypeN ame and handle the ObjectDataSourc e's Inserting,
Updating and Deleting events ... but this still requires a fair amount
of trivial code.

It would have been great if there was a way to plug into the creation
of BusinessEntity instances instead of relying on default constructors
....

Cheers,

Millen

May 24 '06 #1
1 2091
The ObjectDataSourc e isn't designed with extensibility in mind so you
have to adapt to it.

If you need more customization, you can use my ExtendedObjectD ataSource
that has more features and comes with full source so you can modify
what you want:

http://www.manuelabadia.com/products/EODS_features.aspx

Right now to create the object it uses
Activator.Creat eInstance(dataO bjectType) but you can change it to
whatever you need.

Manu

May 24 '06 #2

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