如何在ASP.NET Core中检测文件下载完成 [英] How to detect file download completion in ASP.NET Core

问题描述

我的Controller类中具有以下代码:

I have the following code in my Controller class:

[HttpPost]
public async Task<IActionResult> GetDataFile(string id, [FromBody] DataLog log)
{
   FileStream fileStream = System.IO.File.OpenRead($"{dataFile}_{id}.log");
   //using a using block or Close prevents the download...
   return File(fileStream, "application/octet-stream");
}

该文件应该是临时存在的，因此当客户端完成下载后，服务器应删除该文件.

The file should exist temporarily, so when the client finished with the download, the server should delete the file.

我知道流打开时无法关闭它.

I know that while the stream is open, I can't close it.

我应该使用什么回调?有最佳实践吗?

What callback should I use? Is there a best practice for this?

推荐答案

您可以执行以下操作:

public FileResult GetDataFile(string id, [FromBody] DataLog log)
{
    var bytes = System.IO.File.ReadAllBytes("<absolute path of file here>");
    System.IO.File.Delete("<absolute path of file here>");
    return File(bytes, "application/octet-stream", "<name of file>");
}

因此，您正在将文件读入字节数组，然后删除物理文件并将字节数组返回给客户端.

So, you are reading the file into the byte array, then deleting the physical file and returning the byte array to the client.

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