“/”应用程序中的服务器错误。

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行 21:                 str_postdate = Convert.ToDateTime(ArticleModel.postdate).ToString("yyyy-MM-dd");
行 22:                 str_hit = ArticleModel.views.ToString();
行 23:                 str_class = new ZZY.BLL.xp_newscategory().GetModel(Convert.ToInt32(ArticleModel.categoryid)).en_category;
行 24:                 //str_author = ArticleModel.author;
行 25: 

[NullReferenceException: 未将对象引用设置到对象的实例。]
   news_details.Page_Load(Object sender, EventArgs e) in e:\vhost\a7a8e2b9abe637830e40f31fc6d6f1a3\httpdocs\en\news-details.aspx.cs:23
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +52
   System.Web.UI.Control.OnLoad(EventArgs e) +97
   System.Web.UI.Control.LoadRecursive() +61
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +693