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:

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:


[NullReferenceException: Object reference not set to an instance of an object.]
   ZujuanWebSite.Util.PageUtil.GetLearnGradesETCInfo(Int32 bankid, Int32 provinceid, List`1 provinces, Int32 learngradeid, Int32 yearid, Int32 papertypeid) +1489
   ZujuanWebSite.Web.HundredSchoolPaperList.GetData() +1175
   ZujuanWebSite.Web.HundredSchoolPaperList.Page_Load(Object sender, EventArgs e) +15
   ZujuanWebSite.Service.AuthLoadBase.OnLoad(EventArgs e) +927
   System.Web.UI.Control.LoadRecursive() +70
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3177


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.36373