“/”应用程序中的服务器错误。

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行 152:
行 153:	templateBuilder.Append("\r\n                \r\n                \r\n            \r\n            
\r\n                \r\n                    \r\n                \r\n            
\r\n        \r\n        
\r\n            
\r\n                ");
行 154:	string category_nav = get_category_menu(category_id);
行 155:
行 156:	templateBuilder.Append("\r\n					当前位置：首页");

[ArgumentNullException: 键不能为 null。
参数名: key]
   System.Collections.Hashtable.get_Item(Object key) +10930315
   DTcms.Web.UI.BasePage.linkurl(String _key, Object[] _params) in d:\221工作区\网站、电子商务产品\通伊欧网站\src\DTcms.Web.UI\BasePage.cs:65
   DTcms.Web.UI.BasePage.LoopChannelMenu(StringBuilder strTxt, String urlKey, Int32 category_id) in d:\221工作区\网站、电子商务产品\通伊欧网站\src\DTcms.Web.UI\Label\category.cs:98
   DTcms.Web.UI.BasePage.LoopChannelMenu(StringBuilder strTxt, String urlKey, Int32 category_id) in d:\221工作区\网站、电子商务产品\通伊欧网站\src\DTcms.Web.UI\Label\category.cs:90
   DTcms.Web.UI.BasePage.get_category_menu(Int32 category_id) in d:\221工作区\网站、电子商务产品\通伊欧网站\src\DTcms.Web.UI\Label\category.cs:156
   ASP.aspx_main_news_aspx.OnInit(EventArgs e) in f:\usr\localuser\xyw8107690001\aspx\main\news.aspx:154
   System.Web.UI.Control.InitRecursive(Control namingContainer) +134
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +489