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

问题描述

我正在使用MVC 4。

I am using MVC 4.

我的控制器中有一个方法，可以根据需要生成CSV文件，然后我希望该文件由用户下载而无需将其保存到服务器端的磁盘。所以我在File（）对象上传递一个MemoryStream，以避免首先将文件保存到磁盘，然后给他下载路径。

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： p>

Controller Method:

[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）具有正确的数据，因为我已经调试并确认

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

我的JavaScript代码：

my javascript code:

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

事实上，窗口实际打开，出现下载对话框，但出现错误，表示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:

下载ReportToCsv中的名称不一样，因为我没有在我的问题中使用真实的名称，但并不重要。

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

任何人都可以帮忙吗？

Can anyone assist?

推荐答案

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

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

这是关于缓存的标题，对于IE版本6- 8。

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

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