DataViewBase.DropRecord Event

Occurs when a record is dropped on the drop target element.

Namespace: DevExpress.Xpf.Grid

Assembly: DevExpress.Xpf.Grid.v23.1.Core.dll

NuGet Package: DevExpress.Wpf.Grid.Core

Declaration

C#

public event EventHandler<DropRecordEventArgs> DropRecord

VB.NET

Public Event DropRecord As EventHandler(Of DropRecordEventArgs)

Event Data

The DropRecord event's data class is DropRecordEventArgs. The following properties provide information specific to this event:

Property	Description
AllowedEffects	Gets a member of the DragDropEffects enumeration that specifies which operations are allowed by the originator of the drag event. Inherited from DragEventArgsBase.
Data	Gets or sets a data object that contains the data associated with the corresponding drag event. Inherited from DragEventArgsBase.
DropPosition	Gets a drop position that specifies how a record is placed after it has been dropped. Inherited from DragEventArgsBase.
Effects	Gets or sets the target drag-and-drop operation. Inherited from DragEventArgsBase.
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.
IsFromOutside	Gets whether the dragged record is from another control. Inherited from DragEventArgsBase.
KeyStates	Gets a flag enumeration indicating the current state of the SHIFT, CTRL, and ALT keys, as well as the state of the mouse buttons. Inherited from DragEventArgsBase.
OriginalSource	Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class. Inherited from RoutedEventArgs.
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.
TargetRecord	Gets a record that is drop target. Inherited from DragEventArgsBase.
TargetRowHandle	Gets the target row handle. Inherited from DragEventArgsBase.

The event data class exposes the following methods:

Method	Description
GetRecordType()	Gets the Type of the transferred records. Inherited from DragEventArgsBase.
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.

Remarks

You can use the DropRecord event to customize a drag-and-drop operation:

XAML

<dxg:GridControl>
   <!---->
   <dxg:GridControl.View>
      <dxg:TreeListView AllowDragDrop="True" DropRecord="OnDropRecord" />
   </dxg:GridControl.View>
</dxg:GridControl>

C#

void OnDropRecord(object sender, DropRecordEventArgs e) {
   object data = e.Data.GetData(typeof(RecordDragDropData));
   foreach (Employee employee in ((RecordDragDropData)data).Records) {
      employee.Position = ((Employee)e.TargetRecord).Position;
      employee.Department = ((Employee)e.TargetRecord).Department;
   }
   if (e.DropPosition == DropPosition.Inside) {
      foreach(Employee employee in ((RecordDragDropData)data).Records) {
         employee.Position = "";
      }
   }
}

View Example: How to manually control Drag-and-Drop in the GridControl

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the DropRecord 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.

XAML

how-to-implement-drag-and-drop-between-the-gridcontrol-and-other-controls-t566741/CS/MainWindow.xaml#L28

                   DragRecordOver="OnDragRecordOver"
                   DropRecord="OnDropRecord"/>
</dxg:GridControl.View>

how-to-manually-control-drag-and-drop-in-the-gridcontrol-e3921/CS/MainWindow.xaml#L12

                      AllowDragDrop="True"
                      DropRecord="OnDropRecord"/>
</dxg:GridControl.View>