Converting DataSet into XML with nested elements

Question

I am writing a WebService that is supposed to convert DataSet into XML. My DataSet is actually list of hotels with categories. Each hotel can belong to one or more categories. I

Answer 1

You could write an sql that would produce the desired model, in xml format directly from the database, like...

SELECT HotelName,
       (select CategoryName from HotelCategories 
       where CategoryHotelName=HotelName
       for xml path('Category')) as Categories 
FROM Hotels 
for xml path('Hotels')

Ofcourse depending on your DB layout...