wpf-devexpress-dot-xpf-dot-gantt-dot-ganttview-ff3c363b.md
Occurs after Gantt tasks have been rescheduled and allows you to rollback the latest edit changes.
Namespace : DevExpress.Xpf.Gantt
Assembly : DevExpress.Xpf.Gantt.v25.2.dll
NuGet Package : DevExpress.Wpf.Gantt
public event EventHandler<TasksScheduledEventArgs> TasksScheduled
Public Event TasksScheduled As EventHandler(Of TasksScheduledEventArgs)
The TasksScheduled event's data class is TasksScheduledEventArgs. The following properties provide information specific to this event:
| Property | Description |
|---|---|
| Handled | Gets or sets a value that indicates the present state of the event handling for a routed event as it travels the route. Inherited from RoutedEventArgs. |
| InvalidPredecessorLinks | Gets a collection of predecessor links that are invalid after scheduling. |
| OriginalSource | Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class. Inherited from RoutedEventArgs. |
| RollbackChanges | Gets or sets whether the control must rollback changes that caused the scheduling. |
| RoutedEvent | Gets or sets the RoutedEvent associated with this RoutedEventArgs instance. Inherited from RoutedEventArgs. |
| Source | Gets or sets a reference to the object that raised the event. Inherited from RoutedEventArgs. |
The event data class exposes the following methods:
| Method | Description |
|---|---|
| InvokeEventHandler(Delegate, Object) | When overridden in a derived class, provides a way to invoke event handlers in a type-specific way, which can increase efficiency over the base implementation. Inherited from RoutedEventArgs. |
| OnSetSource(Object) | When overridden in a derived class, provides a notification callback entry point whenever the value of the Source property of an instance changes. Inherited from RoutedEventArgs. |
The TasksScheduled event allows you to rollback changes if they create invalid links.
Use the TasksScheduledEventArgs.InvalidPredecessorLinks property to access a collection of invalid links. Set the TasksScheduledEventArgs.RollbackChanges property to true to rollback the latest changes.
<dxgn:GanttControl ...>
<dxgn:GanttControl.View>
<dxgn:GanttView ...
TasksScheduled="GanttView_TasksScheduled">
</dxgn:GanttView>
</dxgn:GanttControl.View>
</dxgn:GanttControl>
private void GanttView_TasksScheduled(object sender, DevExpress.Xpf.Gantt.TasksScheduledEventArgs e) {
if (e.InvalidPredecessorLinks.Count > 0) e.RollbackChanges = true;
}
Private Sub GanttView_TasksScheduled(ByVal sender As Object, ByVal e As DevExpress.Xpf.Gantt.TasksScheduledEventArgs)
If e.InvalidPredecessorLinks.Count > 0 Then e.RollbackChanges = True
End Sub
See Also