“/”应用程序中的服务器错误。

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行 1422:            string sql = "select repeats,starttag,endtag from tags where name='" + tagename + "'";
行 1423:            OleDbDataReader dr = con.DrSelect(sql, null);
行 1424:            if (dr.Read())
行 1425:            {
行 1426:                str = loadcolumn(idsparam[0], idsparam[1], con);

[NullReferenceException: 未将对象引用设置到对象的实例。]
   jss_fc.JSSMethods.mt_columnjl(String tagename, OperateDB con, String[] param, String[] idsparam) in d:\website\lajs_netweb\App_Code\jss_fc\JSSMethods.cs:1424
   jss_fc.JSSMethods.TAGES_SINGLE(String tagename, OperateDB con, String[] param, String[] idsparam) in d:\website\lajs_netweb\App_Code\jss_fc\JSSMethods.cs:183
   info.Page_Load(Object sender, EventArgs e) in d:\website\lajs_netweb\info.aspx.cs:64
   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