DragDropEvents.BeginDragDrop Event
Occurs when a drag-and-drop operation is initiated.
Namespace: DevExpress.Utils.DragDrop
Assembly: DevExpress.Utils.v24.2.dll
NuGet Packages: DevExpress.Utils, DevExpress.Wpf.Core
#Declaration
#Event Data
The BeginDragDrop event's data class is BeginDragDropEventArgs. 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 Cancel |
Data | Gets or sets the dragged data elements. |
Preview |
Gets or sets a preview of dragged data elements (rows/nodes/items). |
#Remarks
Users can start a drag operation with a click or double click on a non-editable row/node cell or row/node indicator. In multi-select mode, users can only use indicators to drag and drop if they are not used to select rows/nodes.
#Example
This example shows how to cancel a drag operation for a specific tree list node.
//You can cancel a drag-and-drop operation.
private void DragDropEvents2_BeginDragDrop(object sender, BeginDragDropEventArgs e) {
//If the source control is a tree list,
//the Data argument contains the collection of tree list nodes being dragged.
List<TreeListNode> list = e.Data as List<TreeListNode>;
if (list.Find((x) => x.GetValue(colDEPARTMENT1).ToString().Contains("Finance")) != null) {
//Set Cancel to true to prohibit the operation.
e.Cancel = true;
}
}
Note
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