Server Error in '/' Application.

String reference not set to an instance of a String.
Parameter name: s

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.ArgumentNullException: String reference not set to an instance of a String.
Parameter name: s

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[ArgumentNullException: String reference not set to an instance of a String.
Parameter name: s]
   System.DateTimeParse.ParseExact(String s, String format, DateTimeFormatInfo dtfi, DateTimeStyles style) +4596434
   System.DateTime.ParseExact(String s, String format, IFormatProvider provider) +37
   PrintArticle.RenderNormalSection(String strarticleId) +526

[Exception: String reference not set to an instance of a String.
Parameter name: s]
   PrintArticle.RenderNormalSection(String strarticleId) +1578
   PrintArticle.Page_Load(Object sender, EventArgs e) +202
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +25
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +42
   System.Web.UI.Control.OnLoad(EventArgs e) +132
   System.Web.UI.Control.LoadRecursive() +66
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2428


Version Information: Microsoft .NET Framework Version:2.0.50727.8806; ASP.NET Version:2.0.50727.8762