如何在ASP.NET Core中下载文件 [英] How to download a file in ASP.NET Core

问题描述

在MVC中，我们使用以下代码下载文件.在ASP.NET核心中，该如何实现?

In MVC, we have used following code to download a file. In ASP.NET core, how to achieve this?

HttpResponse response = HttpContext.Current.Response;                 
System.Net.WebClient net = new System.Net.WebClient();
string link = path;
response.ClearHeaders();
response.Clear();
response.Expires = 0;
response.Buffer = true;
response.AddHeader("Content-Disposition", "Attachment;FileName=a");
response.ContentType = "APPLICATION/octet-stream";
response.BinaryWrite(net.DownloadData(link));
response.End();

推荐答案

您的控制器应返回IActionResult，并使用File方法，例如:

Your controller should return an IActionResult, and use the File method, such as this:

[HttpGet("download")]
public IActionResult GetBlobDownload([FromQuery] string link)
{
    var net = new System.Net.WebClient();
    var data = net.DownloadData(link);
    var content = new System.IO.MemoryStream(data);
    var contentType = "APPLICATION/octet-stream";
    var fileName = "something.bin";
    return File(content, contentType, fileName);
}

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