https://zhuanlan.zhihu.com/p/35053877

 

文件下载

找到指定的文件，转换成流，通过.net core自带的File方法返回流文件，完成文件下载：

[HttpGet("download")]
public async Task<IActionResult> Get(string fileName)
{
    try
    {
        var addrUrl = Path.Combine(Directory.GetCurrentDirectory(), BASEFILE, $@"{fileName}");
        FileStream fs = new FileStream(addrUrl, FileMode.Open);
        return File(fs, "application/vnd.android.package-archive", fileName);
    }
    catch(Exception ex)
    {
        return NotFound();
    }
}