private static void OnDragInitialize(object sender, DragInitializeEventArgs e)
        {
            RadGridView grid = (RadGridView)sender;
            var source = e.OriginalSource as FrameworkElement;
            if (source != null && source.Name != "PART_RowResizer")
            {
                DragDropIndicationDetail details = new DragDropIndicationDetail();
                var item = (sender as RadGridView).SelectedItem;
                details.CurrentDraggedItem = item;

                IDragPayload dragPayload = DragDropPayloadManager.GeneratePayload(null);

                dragPayload.SetData("DraggedItem", item);
                dragPayload.SetData("DropDetails", details);

                e.Data = dragPayload;

                e.DragVisual = new DragVisual()
                {
                    Content = details,
                    ContentTemplate = grid.Resources["DraggedItemTemplate"] as DataTemplate
                };
                e.DragVisualOffset = e.RelativeStartPoint;
                e.AllowedEffects = DragDropEffects.All;
            }
        }
        private void OnDragInitialize(object sender, DragInitializeEventArgs e)
        {
            DragDropIndicationDetail details = new DragDropIndicationDetail();
            var items = (sender as RadListBox).SelectedItems;
            details.CurrentDraggedItem = items;

            IDragPayload dragPayload = DragDropPayloadManager.GeneratePayload(null);

            dragPayload.SetData("DraggedData", items);
            dragPayload.SetData("DropDetails", details);

            e.Data = dragPayload;

            //Si les infos du drag&drop ne doivent pas être cachées
            if (GetInfosHidden(sender as DependencyObject).Equals(false))
            {
                e.DragVisual = new DragVisual()
                {
                    Content = details,
                    ContentTemplate = this.AssociatedObject.Resources["DraggedItemTemplate"] as DataTemplate
                };
            }
            else
            {
                e.DragVisual = new DragVisual();
            }

            e.DragVisualOffset = new Point(e.RelativeStartPoint.X + 20, e.RelativeStartPoint.Y + 20);
            e.AllowedEffects = DragDropEffects.All;
        }