UI virtualization provides major performance enhancements for grids that contain a significant amount of data by creating cells only when they are needed. 

UI virtualization can be activated or deactivated by setting the UIVirtualizationMode property of the GridControl class. By default—if a license key for version 3.6 or higher is used—UI virtualization will automatically be activated. If a license key for a version prior to 3.6 is used, UI virtualization will not be activated and will not be usable.

Remarks

It is recommended to set this property before rows are added to a grid or binding a grid to its data source. It is also recommended to set this property to false if the Cell.SiblingValueChanged event is to be used extensively.

Changing this property from None to Cells will only affect the rows added afterward. Changing from Cells to None will only affect rows added afterward or cells whose properties are modified afterward.

Detail Grids

Setting the Collapsed property of the detail-grid template to true prior to binding the grid to a data source will provide a significant decrease in grid's loading time as the data rows contained in the detail grids will only be created when a detail grid is accessed. This feature is not license-key dependent.

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