使用Response.TransmitFile下载文件，但也包含了页面的源代码 [英] Using Response.TransmitFile to download file but also contains the page source

问题描述

下面是违规code，我下载一个CSV但它附加的网页的源文件的底部如何prevent任何想法？

  VAR价格表=测试（）;
            常量字符串downloadName =PriceList.csv;
            变种FS =新的FileStream（downloadName，FileMode.Create）;            VAR CSV =新CsvHelper.CsvHelper（FS）;
            csv.Writer.WriteRecords（价格表）;
            Response.ClearContent（）;            //不知道正确的内容类型是什么。这是probally错误
            Response.ContentType =应用程序/ XLS
            //设置大小可选
            Response.AddHeader（内容处置，
               附件;文件名=+ downloadName +;大小=+ fs.Length.ToString（））;
            变种FN = fs.Name;
            fs.Close（）;
            loadingImage.Visible = FALSE;
            Response.TransmitFile（FN）;
            Response.Flush（）;
 

解决方案

呼叫到Response.End（）。

另外，为什么保存该文件只是重新发送它？充其量，这是浪费，而且如果你打算重用的名字，那么你已经一个竞争条件，如果两个人打这个页面在同一时间。相反，发送文件，请使用 VAR CSV =新CsvHelper.CsvHelper（Response.OutputStream）让你写直奔浏览器（你必须先虽然发送您的头）。

此外，内容类型为CSV文件，为文本/ CSV 。

Below is the offending code, I download a csv however it appends the page source to the bottom any ideas on how to prevent this?

            var priceList = Test();
            const string downloadName = "PriceList.csv";
            var fs = new FileStream(downloadName, FileMode.Create);

            var csv = new CsvHelper.CsvHelper(fs);
            csv.Writer.WriteRecords(priceList);
            Response.ClearContent();

            //not sure what the correct content type is. This is probally wrong
            Response.ContentType = "application/xls";
            //Setting size is optional               
            Response.AddHeader("Content-Disposition",
               "attachment; filename=" + downloadName + "; size=" + fs.Length.ToString());
            var fn = fs.Name;
            fs.Close();
            loadingImage.Visible = false;
            Response.TransmitFile(fn);
            Response.Flush();

解决方案

Call Response.End().

Also, why save the file just to resend it? At best this is wasteful, but also if you're reusing the name then you've a race-condition if two people hit this page at the same time. Instead of sending the file, use var csv = new CsvHelper.CsvHelper(Response.OutputStream) so you write straight to the browser (you'll have to send your headers first though).

Also, the content-type for CSV files is text/csv.

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