Version

defaultSortDirection Property

How the data will be sorted as its being grouped. This is the default value for the column, unless otherwise specified when the column gets grouped.
Syntax
ASP.NET Ajax Javascript (Specification) 
function get_defaultSortDirection() : GroupingSortDirection
ASP.NET Ajax Javascript (Usage) 
var resultVar = instanceOfColumnGroupingSetting.get_defaultSortDirection();
See Also