I've created a Dataview WebPart that consumes a custom WebService. When
I enable column sorting on the DataView, it never seems to work. The
WebService method either returns a custom collection object or an
XmlDocument, but neither seem to work. If the webservice returns a
dataset, I am able to sort again. I really do not want to return
DataSet, but I'm wondering what may be different about it that allows
the DataView WebPart to sort by column headers. How do you return a
collection of many items through a WebService?

BTW.. If I add the sort toolbar to the Dataview, it does work
correctly.