Indicates whether this drop-down item represents a special operand that will be used to filter records when the item is selected. The underlying Value will be an instance of Infragistics.Windows.Controls.SpecialFilterOperandBase derived class.
For example, the built-in entries of 'Today', 'Yesterday', 'This Week' etc... are implemented using special operands.
You can add your own custom operand the filter drop-down. To do so implement derive a class from Infragistics.Windows.Controls.SpecialFilterOperandBase and provide the necessary logic to filter data in the derived class. Then add an entry to the filter drop-down list where the value of that entry is the instance of that class. When the user selects the entry in the filter drop-down, the associated special operand will be used for filtering records.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2