Question

我有其他线程中的bellow代码，但实际上它显示了如何将MultipartFileData文件保存到磁盘。

[HttpPost]
public Task<HttpResponseMessage> PostFormData()
{
    // Check if the request contains multipart/form-data.
    if (!Request.Content.IsMimeMultipartContent())
    {
        throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
    }

    string root = HttpContext.Current.Server.MapPath(Settings.AssetImageTempStorage);
    var provider = new MultipartFormDataStreamProvider(root);

    // Read the form data and return an async task.
    var task = Request.Content.ReadAsMultipartAsync(provider).
        ContinueWith<HttpResponseMessage>(t =>
        {
            if (t.IsFaulted || t.IsCanceled)
            {
                Request.CreateErrorResponse(HttpStatusCode.InternalServerError, t.Exception);
            }

            // This illustrates how to get the file names.
            foreach (MultipartFileData file in provider.FileData)
            {
                // HOW DO I SAVE THIS FILE TO DISK HERE ???
                Trace.WriteLine(file.Headers.ContentDisposition.FileName);
                Trace.WriteLine("Server file path: " + file.LocalFileName);
            }
            return Request.CreateResponse(HttpStatusCode.OK);
        });

    return task;
}

Answer 1

以下是在服务器中保存文件的示例。希望这会对你有所帮助。

validate :check_test_id

def check_test_id
  date = ( created_at || Date.current ).to_date
  if self.class.exists? ["DATE(created_at) = DATE(?) AND test_id = ?", date, test_id]
    errors.add :test_id, "is not unique for #{date}"
  end
end

将MultipartFileData文件保存到磁盘

1 个答案: