private void lstBox_Drop(object sender, DragEventArgs e) { DragDropData data = e.Data.GetData(typeof(DragDropData)) as DragDropData; if (!tasks.Any(x => x == data.ActualData.ToString())) { Tasks.Add(data.ToString()); } var a = data.DragStartSource; if (a != tasks) { a.Remove(data.ToString()); } }
private void lstBox_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e) { try { ListBox parent = (ListBox)sender; dragSource = parent; object data = GetDataFromListBox(dragSource, e.GetPosition(parent)); if (data != null) { var dragDropData = new DragDropData { ActualData = data, DragStartSource = tasks }; DragDrop.DoDragDrop(parent, dragDropData, DragDropEffects.Move); } } catch (Exception ex) { MessageBox.Show(ex.Message); } }