“/”应用程序中的服务器错误。

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行 2561:                string sql_ = "select * from " + param[2] + " where id=" + id;
行 2562:                OleDbDataReader dr_ = con.DrSelect(sql_, null);
行 2563:                if (dr_.Read())
行 2564:                {
行 2565:                    string str_repeat = dr["repeats"] as string;//循环体

[NullReferenceException: 未将对象引用设置到对象的实例。]
   jss_fc.JSSMethods.mt_infodisplay(String tagename, OperateDB con, String id, String[] param) in d:\website\lajs_netweb\App_Code\jss_fc\JSSMethods.cs:2563
   jss_fc.JSSMethods.TAGES_SINGLE(String tagename, OperateDB con, String[] param, String[] idsparam) in d:\website\lajs_netweb\App_Code\jss_fc\JSSMethods.cs:87
   info.Page_Load(Object sender, EventArgs e) in d:\website\lajs_netweb\info.aspx.cs:70
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +24
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +51
   System.Web.UI.Control.OnLoad(EventArgs e) +136
   System.Web.UI.Control.LoadRecursive() +97
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2523