windowsforms-devexpress-dot-xtradiagram-dot-diagramcontrol-a58f79e7.md
Occurs when the connection is about to be changed by the end-user.
Namespace : DevExpress.XtraDiagram
Assembly : DevExpress.XtraDiagram.v25.2.dll
NuGet Package : DevExpress.Win.Diagram
[DiagramCategory(DiagramCategory.DiagramItems)]
public event EventHandler<DiagramConnectionChangingEventArgs> ConnectionChanging
<DiagramCategory(DiagramCategory.DiagramItems)>
Public Event ConnectionChanging As EventHandler(Of DiagramConnectionChangingEventArgs)
The ConnectionChanging event's data class is DiagramConnectionChangingEventArgs. The following properties provide information specific to this event:
| Property | Description |
|---|---|
| Cancel | Gets or sets a value indicating whether the event should be canceled. Inherited from CancelEventArgs. |
| Connector | Returns the connector whose beginning/ending item is about to be changed. |
| ConnectorPointType | Returns the type of the connection point which is about to be moved. |
| NewIndex | Returns the index of the connection point on the diagram item to which the connector is about to be attached. |
| NewItem | Returns the diagram item the connector is about to be attached to. |
| NewPoint | Returns the new coordinates of the connection point which is about to be moved. |
| OldIndex | Returns the index of the connection point on the diagram item from which the connector is about to be detached. |
| OldItem | Returns the diagram item from which the connector is about to be detached. |
| OldPoint | Returns the initial coordinates of the connection point which is about to be moved. |
The ConnectorPointType event’s property returns whether the connection point that is about to be changed is the begin or end point. To get the previous diagram item and its connection point to which the connection point was glued, use the OldItem and OldIndex properties correspondingly. The new item and its connection point are returned by the NewItem and NewIndex properties
See Also