Hello Wiliam,
Thank you for contacting Telerik Support.
RadListView supports Drag & Drop functionality. First you should enable the AllowDragDrop property for both of the RadListViews. As the build-in Drag & Drop behaviour
moves listViewItems to the target location with user interaction only, it is necessary to subscribe to the PreviewDragDrop event where you should make a copy of the selected Item. It is indispensable to handle the event in order to prevent removing the selected item from the first listView. The copy item should be added to the second listView. Please have a look at the following code snippet:
public Form1()
{
InitializeComponent();
this.radListView1.AllowDragDrop = true;
this.radListView2.AllowDragDrop = true;
this.radListView3.AllowDragDrop = true;
radListView1.ListViewElement.DragDropService.PreviewDragDrop += DragDropService_PreviewDragDrop;
radListView2.ListViewElement.DragDropService.PreviewDragDrop += DragDropService_PreviewDragDrop;
radListView3.ListViewElement.DragDropService.PreviewDragDrop += DragDropService_PreviewDragDrop;
}
void DragDropService_PreviewDragDrop(object sender, Telerik.WinControls.RadDropEventArgs e)
{
e.Handled = true;
ListViewDataItem listViewDISender = (sender as ListViewDragDropService).DraggedItem as ListViewDataItem;
RadListView senderListView = listViewDISender.Owner.ElementTree.Control as RadListView;
IconListViewVisualItem originalItem = e.DragInstance as IconListViewVisualItem;
ListViewDataItem copyItem = new ListViewDataItem(originalItem.Text);
copyItem.Image = originalItem.Image;
IconListViewElement viewElement = e.HitTarget as IconListViewElement;
if (viewElement != null)
{
RadListView listViewControl = viewElement.ElementTree.Control as RadListView;
if (listViewControl != senderListView)
{
listViewControl.Items.Add(copyItem);
}
}
IconListViewVisualItem visualItem = e.HitTarget as IconListViewVisualItem;
if (visualItem != null)
{
RadListView listViewControl = visualItem.ElementTree.Control as RadListView;
if (listViewControl != senderListView)
{
listViewControl.Items.Add(copyItem);
}
}
}
The obtained result is displayed in drag&drop.png.
I hope this information helps. Should you have further questions, I would be glad to help.
Regards,
Desislava
Telerik
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