DataGrid多页显示数据使序号连续

在DataGrid的ItemDataBound事件里写
e.Item.Cells[0].Text = ((Datagrid1.PageCount-1) * Datagrid1.PageSize+(e.Item.ItemIndex + 1)).ToString();
或
e.Item.Cells[0].Text = ((Datagrid1.PageSize * Datagrid1.CurrentPageIndex) + (e.Item.ItemIndex + 1)).ToString();