/// <summary>
 /// 获取永久素材列表。
 /// </summary>
 /// <param name="filter">获取素材列表的筛选信息。</param>
 /// <returns>获取素材列表的结果模型。</returns>
 public GetMaterialListResultModel GetList(GetMaterialListFilter filter)
 {
     var url = "https://api.weixin.qq.com/cgi-bin/material/batchget_material?access_token=" + _accountModel.GetAccessToken();
     return WeiXinHttpHelper.PostResultByJson<GetMaterialListResultModel>(url, filter);
 }
        /// <summary>
        /// 获取永久素材列表。
        /// </summary>
        /// <param name="filter">获取素材列表的筛选信息。</param>
        /// <returns>获取素材列表的结果模型。</returns>
        public GetMaterialListResultModel GetList(GetMaterialListFilter filter)
        {
            var url = "https://api.weixin.qq.com/cgi-bin/material/batchget_material?access_token=" + _accountModel.GetAccessToken();

            return(WeiXinHttpHelper.PostResultByJson <GetMaterialListResultModel>(url, filter));
        }