windowsforms-devexpress-dot-xtratreelist-dot-treelist-5a28c6bc.md
Occurs after a layout the version of which doesn’t match the current layout version used has been loaded from storage (a stream, xml file or system registry).
Namespace : DevExpress.XtraTreeList
Assembly : DevExpress.XtraTreeList.v25.2.dll
NuGet Packages : DevExpress.Win.Navigation, DevExpress.Win.TreeList
public event LayoutUpgradeEventHandler LayoutUpgrade
Public Event LayoutUpgrade As LayoutUpgradeEventHandler
The LayoutUpgrade event's data class is LayoutUpgradeEventArgs. The following properties provide information specific to this event:
| Property | Description |
|---|---|
| NewHiddenItems | Returns an array of items that exist in the current control but do not exist in the layout being loaded. These items are hidden. This property is in effect for the LayoutControl. |
| PreviousVersion | Returns the textual representation of the previous layout version. |
The LayoutUpgrade event allows you to customize the current layout after an earlier version of the layout has been loaded and applied to the control. See the OptionsLayoutBase.LayoutVersion ( TreeList.OptionsLayout.LayoutVersion ) topic for more information.
See Also