Virtual
Enables the virtualization feature of the widget. The configuration can be set on an object, which contains two properties - itemHeight and valueMapper.For detailed information, refer to the article on virtualization.
Definition
Namespace:Telerik.Web.UI.MultiColumnComboBox
Assembly:Telerik.Web.UI.dll
Syntax:
public class Virtual : StateManager, IMarkableStateManager, IStateManager, IDefaultCheckInheritance: objectStateManagerVirtual
Implements:
Inherited Members
Constructors
public Virtual()Properties
Specifies whether the implementing object has default values.
public bool IsDefault { get; }Implements:
Specifies the height of the virtual item. All items in the virtualized list must have the same height. If the developer does not specify one, the framework will automatically set itemHeight based on the current theme and font size.
public double ItemHeight { get; set; }The changes introduced with the Kendo UI R3 2016 release enable you to determine if the valueMapper must resolve a value to an index or a value to a dataItem. This is configured through the mapValueTo option that accepts two possible values - "index" or "dataItem". By default, the mapValueTo is set to "index", which does not affect the current behavior of the virtualization process.For more information, refer to the article on virtualization.
public string MapValueTo { get; set; }The widget calls the valueMapper function when the widget receives a value, that is not fetched from the remote server yet. The widget will pass the selected value(s) in the valueMapper function. In turn, the valueMapper implementation should return the respective data item(s) index/indices.
public string ValueMapper { get; set; }