从下载文件FileResult不保存到磁盘 [英] Download File from FileResult without saving to disk

问题描述

我使用MVC 4。

我在我的控制器的方法生成一个CSV需求的文件，我想这个文件被用户下载，然后无需在服务器端保存到磁盘。所以，我传递一个MemoryStream文件（）对象以避免首先文件保存到磁盘，后来给他下载的路径。

I have a method in my controller which generates a CSV file on demand and I want this file to be then downloaded by the user without the need of saving it to the disk at the server side. So I am passing a MemoryStream on the File() object to avoid having to firstly save file to disk and later give him the path for download.

控制器方法：

[HttpGet]
public ActionResult GenerateCsv(string data)


    var sb = new StringBuilder();
    sb = GetCsvReportToString(data);

    var stream = new MemoryStream(Encoding.UTF8.GetBytes(sb.ToString()));

    return this.File(stream, "text/csv", "ReportCsv.csv");
}

SB（StringBuilder）对具有正确的数据，因为我已经调试它，并证实了它。

sb (StringBuilder) has the correct data, as I have debugged it and confirmed it.

我的javascript code：

my javascript code:

window.open(generateFileLink + '?data=' + dataToSend, '_blank');

窗口得到实际上打开，但会出现一个错误的下载对话框，说不能从本地主机下载：

The window gets in fact opened, the download dialog appears but with an error, saying that it cannot be downloaded from localhost:

这个名字是在下载ReportToCsv不同，因为我没有用在我的问题方法的真实姓名，但没有关系。

The name is different in the download "ReportToCsv" because I didn't use real names for methods in my question, but doesn't matter.

任何人都可以帮助？

推荐答案

在这个问题的答案可以在这里找到： HTTP：/ /stackoverflow.com/a/11267754/1417487

The answer to this question can be found here: http://stackoverflow.com/a/11267754/1417487

这是一个关于缓存的头，IE浏览器版本6-8。

It's a regarding the headers of cache, for IE versions 6-8.

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