ASP.NET Core MVC Fileダウンロード

FileStreamResult.md

HomeController.cs

public IActionResult Download()
{
  var mimeType = "text/xml";
  var xml = @"
<xml>
<var>テスト</var>
</xml>";
  var fileContent = System.Text.Encoding.UTF8.GetBytes(xml);
  var stream = new MemoryStream(fileContent);
  var fileStreamResult = new FileStreamResult(stream, mimeType);
  fileStreamResult.FileDownloadName = "FileStreamExample.xml";
  return fileStreamResult;
}

Index.chtml

<a asp-action="Download" asp-controller="Home">Download</a>