Hi All,

I've been experimenting with LLBLGenProDataSource control and databinding and have a question about viewstate size.

I have the Nov 6 release of LLBLGenPro 2.0

My table has a total of 4 rows. The mapped entity has 2 integer, 1 string & 1 boolean properties.

If I bind a collection of these entities to a gridview control using the LLBLGenDatasource the viewstate size for the LLBLGenDatasource is 7760 bytes.

Because I want to apply a filter to the collection I use the Perform_Select event, disable livepersistance and retrieve the filtered data (2 entities returned instead of 4). The viewstate size for the LLBLGenDatasource is now 29240 bytes....

Am I doing something wrong? Why such a huge increase?

Thanks

The viewstate size depends on the number of controls that use it.

To test for the LLBLGenProDataSource, you may create an empty web page with just a one LLBLGenProDataSource and the datagrid to display the data. And then try to replicate your scenario.

Also I think having a ViewState with 10-30 Kb is acceptable, otherwise if you want more light weight, then you might use DataTables(TypedLists, TypedViews & DynamicLists), instead of EntityCollections.

You can also set the datasourcecache to session instead of viewstate. That's normally more efficient, as it doesn't need to use serialization in that case.

Thanks guys. I've experimented with a typed list and the footprint is much smaller so for larger results I'll use those instead.

Cheers