WPF (当 ItemsSource 正在使用时操作无效。改用 ItemsControl.ItemsSource 访问和修改)错误解决方案

                int selectIndex = dgExport.SelectedIndex;
                ICollectionView view = (ICollectionView)CollectionViewSource.GetDefaultView(dgExport.ItemsSource);
                List<Export> items = new List<Export>();
                items = (List<Export>)view.SourceCollection;
                items.RemoveAt(selectIndex);
                dgExport.Items.Refresh();