protected void grdvw_List_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        strSelectedId = grdvw_List.Rows[e.RowIndex].Cells[3].Text;
        string strSql;

        if (carobj.delete(strSelectedId))
        {
            ScriptManager.RegisterStartupScript(this.Page, this.GetType(), "", "alert('数据删除成功!')", true);
        }
        else
        {
            ScriptManager.RegisterStartupScript(this.Page, this.GetType(), "", "alert('数据删除失败!')", true);
        }
        Query();
    }