上传微信素材的两种方式

       /// <summary>
        /// 上传微信素材的两种方式
        /// </summary>
        /// <returns></returns>
        public async Task<IActionResult> UploadLoadMedia()
        {
            string token = await GetTokenAsync();

            #region 方式一：通过webClient
            WebClient webClient = new WebClient();
            var media = webClient.UploadFile(string.Format(WxApis.UploadMedia, token, "image"), $"{env.WebRootPath}/images/02.jpg");
            var str = Encoding.Default.GetString(media);
            #endregion

            #region 方式二：通过HttpClient
            HttpClient httpClient = new HttpClient();            
            using FileStream fileStream = new FileStream($"{env.WebRootPath}/images/02.jpg", FileMode.Open, FileAccess.Read);            
            var boundary = DateTime.Now.Ticks.ToString("X");
            using (var content = new MultipartFormDataContent(boundary))
            {
                content.Headers.ContentType = new MediaTypeHeaderValue("multipart/form-data");
                content.Add(new StreamContent(fileStream), "buffer", "\"" + $"{env.WebRootPath}/images/02.jpg" + "\"");
                content.Headers.TryAddWithoutValidation("Content-Disposition", $"form-data; name=\"media\";filename=\"02.jpg\"");
                try
                {
                    var json = await httpClient.PostAsync(string.Format(WxApis.UploadMedia, token, "image"), content).Result.Content.ReadAsStringAsync();
                }
                catch (Exception ex)
                {
                    //ex.Message;
                }
            }
            #endregion
            return Ok();
        }