2. 文件上传下载

文件下载

[HttpGet, NonUnify]
public IActionResult FileDownload(string path, string fileName)
{
    string filePath = "这里获取完整的文件下载路径";
    return new FileStreamResult(new FileStream(filePath, FileMode.Open), "application/octet-stream") { FileDownloadName = fileName };
}

关于前端获取文件名

如果前端获取不到文件夹，可添加以下配置：

_httpContextAccessor.HttpContext.Response.Headers.Add("Content-Disposition", $"attachment; filename={文件名}");
_httpContextAccessor.HttpContext.Response.Headers.Add("Access-Control-Expose-Headers", "Content-Disposition");

文件上传

[HttpPost, NonUnify]
public async Task<IActionResult> UploadFileAsync(List<IFormFile> files)
{
    // 保存到网站根目录下的 uploads 目录
    var savePath = Path.Combine(App.HostEnvironment.ContentRootPath, "uploads");
    if(!Directory.Exists(savePath)) Directory.CreateDirectory(savePath);

    long size = files.Sum(f => f.Length);

    foreach (var formFile in files)
    {
        if (formFile.Length > 0)
        {
            // 避免文件名重复，采用 GUID 生成
            var filePath = Path.Combine(savePath, Guid.NewGuid().ToString("N") + Path.GetExtension(formFile.FileName));  // 可以替代为你需要存储的真实路径

            using (var stream = System.IO.File.Create(filePath))
            {
                await formFile.CopyToAsync(stream);
            }
        }
    }

    // 在动态 API 直接返回对象即可，无需 OK 和 IActionResult
    return Ok(new { count = files.Count, size });
}

关于使用axios上传文件,方法获取到参数files.Count=0

axios请求配置

    let formData = new FormData();
    formData.append("files", this.file); //files需与方法里的参数files名称一样
    let config = {
      headers: {
        "Content-Type": "multipart/form-data",
      },
    };
    axios.post(this.uploadURL, formData, config).then((res) => {//需引入axios
      console.log(res);
    });