wpf datagrid根据多选选中的获取单元格内容，进行操作数据

private void Button_Click(object sender, RoutedEventArgs e)
        {
            var vLst = this.dgList.SelectedItems;
            for (int i = 0; i < vLst.Count; i++)
            {

　　　　1.//获取选中的数据
                string str = (dgList.Columns[1].GetCellContent(vLst[i]) as TextBlock).Text;

               2. //开始处理操作数据

            }
        }