.NetCore表单提交文件

           #region 表单提交
                string url="";//提交的地址

                using (var client = new HttpClient())
                {
                    var form = new MultipartFormDataContent();
                    //form.Add(new StringContent(UserName), "username");
                    //form.Add(new StringContent(PassWord), "password");
                    form.Add(new StringContent(fileName), "fileName");
                    form.Add(new StringContent(title), "title");
                    form.Add(new StringContent(author), "author");
                    form.Add(new StringContent(checkData), "checkData");
                    form.Add(new StringContent(version), "version");

                    

                    var responseWait = client.PostAsync(url, form);
                    responseWait.Wait();
                    var response = responseWait.Result;
                    var resultWait = response.Content.ReadAsStringAsync();
                    resultWait.Wait();
                    var result = resultWait.Result;

                    if (!string.IsNullOrWhiteSpace(result))
                    {
                       var Result = JsonConvert.DeserializeObject<object>(result);
                    }
                }

                return Result;
                #endregion