private void ExportToExcel(HttpContext context)
        {
            HttpResponse resp = System.Web.HttpContext.Current.Response;

            resp.Charset = "utf-8";
            resp.Clear();
            string filename = "现存量明细表_" + DateTime.Now.ToString("yyyyMMddHHmmss");

            resp.AppendHeader("Content-Disposition", "attachment;filename=" + filename + ".xls");
            resp.ContentEncoding = System.Text.Encoding.UTF8;

            resp.ContentType = "application/ms-excel";
            string style = "<meta http-equiv=\"content-type\" content=\"application/ms-excel; charset=utf-8\"/>" + "<style> .table{ font: 9pt Tahoma, Verdana; color: #000000; text-align:center;  background-color:#8ECBE8;  }.table td{text-align:center;height:45px;background-color:#EFF6FF;}.table th{ font: 9pt Tahoma, Verdana; color: #000000; font-weight: bold; background-color: #8ECBEA; height:35px;  text-align:center; padding-left:10px;}</style>";

            resp.Write(style);

            resp.Write("<table class='table'><tr><th>产品编码</th><th>产品名称</th><th>数量</th></tr>");

            var dt = DalCurrentStock.GetCurrentStock();

            foreach (DataRow tmpRow in dt.Rows)
            {
                resp.Write("<tr><td>" + tmpRow["cInvCode"] + "</td>");
                resp.Write("<td>" + tmpRow["cInvName"] + "</td>");
                resp.Write("<td>" + tmpRow["iQuantity"] + "</td>");
                resp.Write("</tr>");
            }
            resp.Write("<table>");

            resp.Flush();
            resp.End();
        }
        private void QueryMain(HttpContext context)
        {
            IList <CurrentStock> list = new List <CurrentStock>();

            var dt = DalCurrentStock.GetCurrentStock();

            for (var i = 0; i < dt.Rows.Count; i++)
            {
                var currentStockItem = new CurrentStock();
                currentStockItem.RowNumber = (i + 1).ToString();
                currentStockItem.InvCode   = dt.Rows[i]["cInvCode"].ToString();
                currentStockItem.InvName   = dt.Rows[i]["cInvName"].ToString();
                currentStockItem.Quantity  = dt.Rows[i]["iQuantity"].ToString();
                list.Add(currentStockItem);
            }

            context.Response.Write(list.ToJson());
            context.Response.End();
        }