Server Error in '/' Application.

Object reference not set to an instance of an object.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

Line 2790:            finally
Line 2791:            {
Line 2792:                dr.Close();
Line 2793:            }
Line 2794:            return str;

Source File: f:\netweb\hl_netweb\App_Code\jss_fc\JSSMethods.cs    Line: 2792

Stack Trace:

[NullReferenceException: Object reference not set to an instance of an object.]
   jss_fc.JSSMethods.mt_toponecolumnname(String tagename, OperateDB con, String id, String[] param) in f:\netweb\hl_netweb\App_Code\jss_fc\JSSMethods.cs:2792
   jss_fc.JSSMethods.TAGES_SINGLE(String tagename, OperateDB con, String[] param, String[] idsparam) in f:\netweb\hl_netweb\App_Code\jss_fc\JSSMethods.cs:63
   info.Page_Load(Object sender, EventArgs e) in f:\netweb\hl_netweb\info.aspx.cs:46
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
   System.Web.UI.Control.OnLoad(EventArgs e) +99
   System.Web.UI.Control.LoadRecursive() +50
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627


Version Information: Microsoft .NET Framework Version:2.0.50727.3053; ASP.NET Version:2.0.50727.3053