windowsforms-devexpress-dot-xtrascheduler-dot-schedulercontrol-11f48f40.md
Occurs when resources displayed in the scheduler view are changed, or the number of visible resources is changed, or the scheduler switches views.
Namespace : DevExpress.XtraScheduler
Assembly : DevExpress.XtraScheduler.v25.2.dll
NuGet Package : DevExpress.Win.Scheduler
public event VisibleResourcesChangedEventHandler VisibleResourcesChanged
Public Event VisibleResourcesChanged As VisibleResourcesChangedEventHandler
The VisibleResourcesChanged event's data class is VisibleResourcesChangedEventArgs. The following properties provide information specific to this event:
| Property | Description |
|---|---|
| NewFirstVisibleResourceIndex | Gets the index of the first (the leftmost or the topmost, depending on the view) resource displayed in the view after the change of visible resources occurs. |
| NewResourcePerPage | Gets the new number of displayed resources. |
| OldFirstVisibleResourceIndex | Gets the index of the first (the leftmost or the topmost, depending on the view) resource displayed in the view before the change of visible resources occurs. |
| OldResourcePerPage | Gets the number of displayed resources before the change takes place. |
The event data class exposes the following methods:
| Method | Description |
|---|---|
| GetVisibleResources() | Obtains a collection of visible resources. |
The Resource Navigator control allows end-users to navigate resources or change the number of visible resources (the SchedulerViewBase.ResourcesPerPage property). When the end user performs this action, the VisibleResourcesChanged event occurs.
The VisibleResourcesChanged event allows you to specify a filter for displayed resources or use the SchedulerStorageBase.FetchAppointments event to load appointments for visible resources only. This may be useful when a large number of resources affect the scheduler performance.
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the VisibleResourcesChanged event.
Note
The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.
winforms-scheduler-optimize-performance-large-dataset/CS/FetchAppointmentExample/Form1.cs#L31
schedulerControl1.VisibleIntervalChanged += schedulerControl1_VisibleIntervalChanged;
schedulerControl1.VisibleResourcesChanged += SchedulerControl1_VisibleResourcesChanged;
winforms-scheduler-optimize-performance-large-dataset/VB/FetchAppointmentExample/Form1.vb#L31
AddHandler schedulerControl1.VisibleIntervalChanged, AddressOf schedulerControl1_VisibleIntervalChanged
AddHandler schedulerControl1.VisibleResourcesChanged, AddressOf SchedulerControl1_VisibleResourcesChanged
schedulerControl1.Start = Date.Today
See Also