How to implement a lazy loaded Silverlight data grid without using paging

Question

Using the Business Application template from the brand new released RIA Services, you can see lots of examples using the data grid on top of a DomainDataSource in combination with a DataPager. The properties PageSize and LoadSize can be used to adjust the amount of data to be displayed in one page and the data that is prefetched in the background.

Now I'd like to have a data grid with a scrollbar and no pager. The underlying DomainDataSource should load only the data that is diplayed in the grid. It should trigger another load, when the user scrolls down to items that are not yet in the data context. Is there any sample implementation how to do this?

Answer 1

Check out the work that Bea Stollnitz has done on her blog. Although not a direct answer to your question, she has written quite a bit on UI and data visualization. Here are a link from her blog that I think might help to get you started:

Data virtualization: http://bea.stollnitz.com/blog/?p=344

HTH!
Chris

Answer 2

It's called stealth paging. Component One has a sample of their DataGrid that uses Stealth Paging. As soon as you scroll down, it gets the next page.

http://demo.componentone.com/Silverlight/ControlExplorer/#DataGrid/Stealth%20Paging

Shows the demo, and you can download the sample which show the code.

Hope this helps,

Greg