windowsforms-devexpress-dot-xtradiagram-dot-diagramcontrol-e9f1c900.md
Raises each time the end-user attempts to move a diagram item.
Namespace : DevExpress.XtraDiagram
Assembly : DevExpress.XtraDiagram.v25.2.dll
NuGet Package : DevExpress.Win.Diagram
[DiagramCategory(DiagramCategory.DiagramItems)]
public event EventHandler<DiagramBeforeItemsMovingEventArgs> BeforeItemsMoving
<DiagramCategory(DiagramCategory.DiagramItems)>
Public Event BeforeItemsMoving As EventHandler(Of DiagramBeforeItemsMovingEventArgs)
The BeforeItemsMoving event's data class is DiagramBeforeItemsMovingEventArgs. The following properties provide information specific to this event:
| Property | Description |
|---|---|
| ActionSource | Indicates whether the moving operation is performed using drag-and-drop, the Properties Panel or by pressing key shortcuts. |
| Cancel | Gets or sets a value indicating whether the event should be canceled. Inherited from CancelEventArgs. |
| IsCopying | Indicates whether the user attempts to copy diagram items by holding Ctrl. |
| Items | Returns the collection of diagram items that are being moved. |
The event’s Items property returns the items that are about to be moved. The ActionSource property indicates whether the moving operation is performed using drag-and-drop or pressing key shortcuts. The IsCopying property returns true when the end-user attempts to move items while holding the CTRL key which results in items being copied.
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the BeforeItemsMoving 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-diagram-track-and-restrict-drag-actions/CS/WinApp7/Form1.cs#L16
diagramControl1.AddingNewItem += DiagramControl1_AddingNewItem;
diagramControl1.BeforeItemsMoving += DiagramControl1_BeforeItemsMoving;
diagramControl1.ItemsMoving += DiagramControl1_ItemsMoving;
See Also