C#实现上传图片到七牛云

 #region 七牛云上传
        public static string uploadfile(string imgurl)
        {
           //这里是通过分割拿到图片名
            string[] imgname_array = imgurl.Split('\\');
            string imgname = imgname_array[imgname_array.Length - 1].Split('.')[((imgname_array[imgname_array.Length - 1].Split('.')).Length - 2)];
            try
            {
                //创建用户对象
                Mac mac = new Mac(Settings.AccessKey, Settings.SecretKey);
                //储存空间名
                string bucket = "";
                //七牛云的图片保存地址
                string savekey ="";
                //传入的照片路径
                string localfile = imgurl;
                //上传凭证
                PutPolicy putPolicy = new PutPolicy();
                putPolicy.Scope = bucket;
                //凭证的有效时间
                putPolicy.SetExpires(3600);
                //设置图片过期时间 可自行更改
                putPolicy.DeleteAfterDays = 7;
                string token = Auth.CreateUploadToken(mac, putPolicy.ToJsonString());
                Config config = new Config();
                // 空间对应的机房
                config.Zone = Zone.ZoneCnSouth;
                //是否启用https域名
                config.UseHttps = true;
                //是否启用cdn加速
                config.UseCdnDomains = true;
                //上传文件时的分片大小
                config.ChunkSize = ChunkUnit.U512K;
                UploadManager um = new UploadManager(config);
                var result = um.UploadFile(localfile, savekey, token, null);
                return savekey;
            }
            catch (Exception ex)
            {
                return "";
            }
        }
        #endregion

七牛云官方文档地址：C# SDK_SDK 下载_对象存储 - 七牛开发者中心 (qiniu.com)https://developer.qiniu.com/kodo/1237/csharp