public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";

            int businessInvoiceId = 0;
            int operateId = 0;

            if (!int.TryParse(context.Request.Form["ii"], out businessInvoiceId) || businessInvoiceId <= 0)
            {
                context.Response.Write("发票序号错误");
                context.Response.End();
            }

            if (!int.TryParse(context.Request.Form["oi"], out operateId) || operateId <= 0)
            {
                context.Response.Write("操作错误");
                context.Response.End();
            }

            NFMT.Common.UserModel user = Utility.UserUtility.CurrentUser;
            NFMT.Common.OperateEnum operateEnum = (NFMT.Common.OperateEnum)operateId;
            NFMT.Common.ResultModel result = new NFMT.Common.ResultModel();

            NFMT.Invoice.BLL.BusinessInvoiceBLL bll = new NFMT.Invoice.BLL.BusinessInvoiceBLL();

            switch (operateEnum)
            {
                case NFMT.Common.OperateEnum.撤返:
                    result = bll.Goback(user, businessInvoiceId);
                    break;
                case NFMT.Common.OperateEnum.作废:
                    result = bll.Invalid(user, businessInvoiceId);
                    break;
                case NFMT.Common.OperateEnum.执行完成:
                    result = bll.Complete(user, businessInvoiceId);
                    break;
                case NFMT.Common.OperateEnum.执行完成撤销:
                    result = bll.CompleteCancel(user, businessInvoiceId);
                    break;
            }

            if (result.ResultStatus == 0)
                result.Message = string.Format("{0}成功", operateEnum.ToString());

            context.Response.Write(result.Message);
        }