Developer Express Aspx Grid - Not doing updates as you go along

Question

I'm having a look at the developer express grid for ASP.NET.

I'm happy with how to set it up in conjunction with an object data source to do updates etc.

However I dont want to save as I go along, I want to perform multiple updates and then save them all at once.

I'm assuming that I need to store the interim updates somewhere e.g. in session (not happy with this) or in view state/ hidden fields.

My questions are

1. Can you access View State from an object datasource method?
2. Is there a better way to achieve this sort of deffered save.