/// <summary>
/// 上传图文消息
/// </summary>
/// <param name="userName">公众号</param>
/// <param name="articles">图文消息</param>
/// <param name="errorMessage">返回上传是否成功</param>
/// <returns>返回上传图文消息的结果；如果上传失败，返回null。</returns>
public static MultiMediaUploadResult Upload(string userName, IEnumerable <MultiMediaArticle> articles, out ErrorMessage errorMessage)
{
if (articles == null)
{
errorMessage = new ErrorMessage(ErrorMessage.ExceptionCode, "图文消息不能为空。");
return(null);
}
AccessToken token = AccessToken.Get(userName);
if (token == null)
{
errorMessage = new ErrorMessage(ErrorMessage.ExceptionCode, "获取许可令牌失败。");
return(null);
}
string url = string.Format(urlForUploadingArticles, token.access_token);
string responseContent;
HttpHelper.Request(url, out responseContent, WebRequestMethods.Http.Post, MultiMediaArticle.ToJson(articles));
return(ParseResult(responseContent, out errorMessage));
}
/// <summary>
/// 新增永久图文素材
/// </summary>
/// <param name="userName">公众号</param>
/// <param name="articles">图文消息</param>
/// <param name="errorMessage">返回新增是否成功</param>
/// <returns>返回图文消息的媒体id；如果失败，返回null。</returns>
public static string Add(string userName, IEnumerable <MultiMediaArticle> articles, out ErrorMessage errorMessage)
{
string responseContent = HttpHelper.RequestResponseContent(urlForAddingNews, userName,
null, httpMethodForEditing, MultiMediaArticle.ToJson(articles));
return(GetMediaId(responseContent, out errorMessage));
}