.net core下对于附件上传下载的实现示例

[HttpPost("upload")]//[DisableRequestSizeLimit] //禁用http限制大小[RequestSizeLimit(100*1024*1024)] //限制http大小public async Task<IActionResult> Post(List<IFormFile> files){  try  {    if (files == null || !files.Any())      return AssertNotFound(new ResponseFileResult { Result = false, Code = ResponseCode.InvalidParameters, ErrorMessage = "附件不能为空" });    string filePath = Path.Combine(Directory.GetCurrentDirectory(), BASEFILE, $@"Template");    if (!Directory.Exists(filePath))      Directory.CreateDirectory(filePath);    var result = new ResponseFileResult();    var fileList = new List<FileResultModel>();    foreach (var file in files)    {      var fileModel = new FileResultModel();      var fileName = ContentDispositionHeaderValue              .Parse(file.ContentDisposition)              .FileName              .Trim('"');      var newName = Guid.NewGuid().ToString() + Path.GetExtension(fileName);      var filefullPath = Path.Combine(filePath, $@"{newName}");      using (FileStream fs = new FileStream(filefullPath, FileMode.Create))//System.IO.File.Create(filefullPath)      {        file.CopyTo(fs);        fs.Flush();      }      fileList.Add(new FileResultModel { Name = fileName, Size = file.Length, Url = $@"/file/download?fileName={newName}" });    }    result.FileResultList = fileList;    return AssertNotFound(result);  }  catch(Exception ex)  {    return AssertNotFound(new ResponseFileResult { Result = false, Code = ResponseCode.UnknownException, ErrorMessage = ex.Message });  }}

[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();  }}