ASP.NET数据库导入Excel

                StringWriter sw = new StringWriter();
                sw.WriteLine("访问购买率");
                sw.WriteLine("排行\t商品名称\t人气指数\t购买次数\t访问购买率");
                int i = 0;
                foreach (ProductSaleInfo productSale in productSaleList)
                {
                    i = i + 1;
                    sw.WriteLine(i.ToString() + "\t" + productSale.Name.ToString() + "\t" + productSale.ViewCount.ToString() + "\t" + productSale.SaleCount.ToString() + "\t" + XWXCommon.ProductBuyRate(productSale.ViewCount.ToString(), productSale.SaleCount.ToString()));
                }
                sw.Close();
                Response.Clear();
                Response.Buffer = true;
                Response.Charset = "GB2312";
                Response.AppendHeader("Content-Disposition&