“/”应用程序中的服务器错误。

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行 46:         news = newsService.GetModel(int.Parse(newsid));
行 47:         dtnews2 = newsService2.GetList(4, "IsTops=1", "Noid desc,NewsId desc").Tables[0];
行 48:         classid = news.ClassID.ToString();
行 49:         categoryShow();
行 50:         dtNewsPrev = newsService.GetList(1, "classid=" + classid + " and Newsid > " + news.NewsId.ToString() + "", " NewsID asc").Tables[0];

[NullReferenceException: 未将对象引用设置到对象的实例。]
   News_Newsview.Page_Load(Object sender, EventArgs e) in c:\wwwroot\威斯尼斯人2022\www\News\Newsview.aspx.cs:48
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +85
   System.Web.UI.Control.OnLoad(EventArgs e) +79
   System.Web.UI.Control.LoadRecursive() +130
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2848