different ui elements with a common data source and different page size

[Matt]

I have a list of data that I want to use both in a grid and in a dropdownlist simultaneously. On the grid, I want it to have a pageSize of 10, but on the dropdownlist I want it to have all of the data items. 

I don't want to specify two data sources for the same data just to get different page sizes. How would I set only the grid pageSize independent of the dataSource?

Thanks in advance,
Matt