//批量删除
 protected void btnDelete_Click(object sender, EventArgs e)
 {
     ChkAdminLevel("users", DTEnums.ActionEnum.Delete.ToString()); //检查权限
     BLL.car_return_recordbll bll = new BLL.car_return_recordbll();
     for (int i = 0; i < rptList.Items.Count; i++)
     {
         int      id = Convert.ToInt32(((HiddenField)rptList.Items[i].FindControl("hidId")).Value);
         CheckBox cb = (CheckBox)rptList.Items[i].FindControl("chkId");
         if (cb.Checked)
         {
             bll.Delete(id);
         }
     }
     JscriptMsg("批量删除成功啦!", Utils.CombUrlTxt("car_return_record_list.aspx", "group_id={0}&keywords={1}",
                                             this.group_id.ToString(), this.keywords), "Success");
 }