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Improving Making DataGridview Virtual Mode with caching sample code

MSDN Winforms DataGridView VirtualMode with caching sample code
DataRetriever loads two pages always to cache thus making 2 database

If datagridview uses one page of data, second page retrieval is unnessecary
and makes DataGridView display 2 times slower.
How to change this sample code so that only one page is loaded initially and
second is loaded on real demand only ?
How to change this code so that it allows more than 2 pages of cached data?
2 page limit seems to be hardcoded into this page.

Or is there some other sample code which has solved those issues ?


Nov 3 '08 #1
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