Updated.
Added namespace to alleviate a certain warning.
Added SqlDataSource for retrieving store names, added some TODO entires, reactivated previous disableSelection() call, created a loop to show all available stores neatly, and added an indicator for the current store.
Spacing change?
Added styles for info area and a center class (simply text-align: center).
Removed SelectCommand from SqlDataSource_TotalSales.
Added new Page_Load() code that detects whether a store is selected and if so, slightly modifies the SQL to adjust.
Small TODO change.
Removed SelectCommand from SqlDataSource_Grid.