ASP.net MVC 返回文件和重定向 [英] ASP.net MVC Return File and Redirect

问题描述

我有一个返回 csv 文件的控制器.我想在显示后重定向到一个动作，即返回主视图.控制器逻辑如下图所示:

I have a controller that returns csv file. I want to redirect to an action after this has displayed, i.e. return to the home view. The controller logic is shown below:

public ActionResult DownloadCSV(string fileName)
{
    string csv;
    using (StreamReader sr = new StreamReader(fileName))
    {
        csv = sr.ReadToEnd();
    }
    return File(new System.Text.UTF8Encoding().GetBytes(csv), "text/csv", "Export.csv");
}

推荐答案

简而言之，由于 HTTP 限制，您无法在同一操作中强制下载和重定向文件.但是您可以通过使用 window.open 打开文件下载操作来强制下载.

The short version is that you can't force a file download and redirect in the same action because of HTTP limitations. But you could force the download by opening the file-download action using window.open.

示例:

<a href="Action/RedirectPage" data-file="Action/DownloadCVS" class="file-download">Download File</a>

<script>
  $(function() {
      $('a.file-download').click(function() {
         window.open($(this).data('file'));
      }); 
  });
</script>

在本例中，我使用了 HTML5 属性，但您不仅限于这种方式.

In this case I used HTML5 attributes, but you're not limited to do it in this way.

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