Page Error

An unexpected error has occurred on this page. The system error have been notified. Please feel free to contact us with the information surrounding this error.
The error occurred in: http://m.weichengs.com/Topics/TopicsList.aspx?CategoryID=0&SectionID=0&page=177
Error Message: 值不能为 null。参数名: String

Stack Trace:
System.ArgumentNullException: 值不能为 null。参数名: String 在 System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) 在 System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info) 在 WeiChengs.WebModules.Topics.Web.TopicsList.BindDataList() 在 System.EventHandler.Invoke(Object sender, EventArgs e) 在 System.Web.UI.Control.OnLoad(EventArgs e) 在 System.Web.UI.Control.LoadRecursive() 在 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)