The demo exhibits the default Filter and Sort functionalities that the RadSpredsheet control provides. You have the ability to either sort ascending,
descending or to clear the sort. As for the filter - you can choose between filtering by value, or condition. If the Filter by condition option is chosen
from the Filter menu, you will be able to select from a large list of conditions that suit best your scenario.
In this specific demo, the Filtering is enabled by default, using the Client API of the control. For this purpose the set_filter() function of the Range object is used,
passing a true value.
Sys.Application.add_load(function () {
var spreadsheet = $find("<%= RadSpreadsheet1.ClientID %>");
var activeSheet = spreadsheet.get_activeSheet();
var range = activeSheet.get_range("A2:F11");
range.set_filter(true);
});