“/”应用程序中的服务器错误。

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行 113:        OleDbDataReader dr = con.DrSelect(sql, null);
行 114:        string infostate = "";
行 115:        if (dr.Read()) {
行 116:            infostate = dr["info_state"].ToString();
行 117:        }

[NullReferenceException: 未将对象引用设置到对象的实例。]
   info.ValidateInfo() in d:\website\lajs_netweb\info.aspx.cs:115
   info.Page_Load(Object sender, EventArgs e) in d:\website\lajs_netweb\info.aspx.cs:38
   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