Returns the value that the list of dealers is currently sorted by.
The value is based on the GET variable SortBy that can be defined in various links.
The element tag names can be used as values.
The system name of a custom field can be used as value in the following way: DealerSearchDealerCustom_SystemName
This example will output a link to sort the list by dealer name in descending order:
<a href="Default.aspx?ID=22&SortBy=DealerSearchDealerName&SortOrder=DESC">Sort By Name</a>