网址：http://cnxsy.net/ListImgPic.aspx?Cid=4<br />消息类型：NullReferenceException<br />消息内容：Object reference not set to an instance of an object.<br />引发异常的方法：Void Record(System.Web.HttpRequest)<br />引发异常源：AutoWebSite10   at AutoWebSite10.BaseClass.Visitors.Record(HttpRequest request)<br />   at AutoWebSite10.Pages.Page_Load(Object sender, EventArgs e)<br />   at System.Web.UI.Control.OnLoad(EventArgs e)<br />   at System.Web.UI.Control.LoadRecursive()<br />   at System.Web.UI.Control.LoadRecursive()<br />   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)