windowsforms-devexpress-dot-xtracharts-dot-heatmap-dot-heatmapcontrol-44f15f45.md
Occurs before the heatmap’s collection of selected items is changed (items are added or removed).
Namespace : DevExpress.XtraCharts.Heatmap
Assembly : DevExpress.XtraCharts.v25.2.UI.dll
NuGet Package : DevExpress.Win.Charts
public event SelectedItemsChangingEventHandler SelectedItemsChanging
Public Event SelectedItemsChanging As SelectedItemsChangingEventHandler
The SelectedItemsChanging event's data class is SelectedItemsChangingEventArgs. The following properties provide information specific to this event:
| Property | Description |
|---|---|
| Action | Gets an action which describes how the collection has been changed. |
| Cancel | Gets or sets the value identifying whether the selection change is canceled. |
| NewItems | Provides access to a collection of new selected chart elements (series and series points) and business data objects if a Chart Control or a series is bound to a data source. |
| OldItems | Provides access to previously selected chart elements (series and series points) and business data objects if a Chart Control or a series is bound to a data source. |
See Also