Typed DataSets returned as regular datasets

[Guest]

I have a web service that creates several reports, rather than exposing a
method for every report I used something similar to the builder pattern, I
pass in an object that inherits from a base class that holds the parameters
for the report and the method calls a custom report builder that builds a
typed DataSet and then returns a Vanilla Dataset that is actually a reference
to a Typed DataSet. Unfortunately when I get the DataSet back and try to cast
it to its original for, I get an InvalidCastException. Is this a bug or is
this the proper behavior for DataSets? I have subclassed other objects and
used them as parameters for Web Services with out any trouble.

 

[Cor Ligthert]

Jon,

I knew I had seen your question before, and because that I was as well
curious for the answer I have searched the msdn.public.dotnet newsgroups for
it.

You become not happy when you see the first answers, however maybe you can
find an answer that fits you.

http://tinyurl.com/443dc

I hope it helps anyhow something?

Cor

 

[Guest]

Workaround found:

Return the ataSet and then create an instance of the Typed DataSet and then
call the merge method, passing in the DataSet returned from the Web Service.