Object reference not set to an instance of an object (Server Error in '/PTWeb' Application)

Object reference not set to an instance of an object (Server Error in '/PTWeb' Application)

Old forum URL: forums.lhotka.net/forums/t/2668.aspx

leonidas posted on Monday, April 09, 2007

Hi there, I'm new to csla and I'm struggling. Yeah, I really am! I'm dutch and have a lot of experience on Office-development (Access, Excel), BI (SQL2005) and a little on dotnet. I read the csla 2.0 book for the better part and didn't grasp it all but got the concepts, I think. The technical dotnet-stuff (=hard for me) is what I try to learn by examining the PTracker-project.

My configuration is SQL2005 Developer (no Express!) and Windows XP Dutch. I tried to follow the instructions in http://www.lhotka.net/files/csla20/BuildCsla.pdf but the PTWeb-project is giving me a hard time. I got the PTWin-project running after some time but with the PTWeb-project I don't now where to look. The error message I get is down here. Can anyone give me a clou? I think it has to do with 6a of the instruction...

thanks in advance, Leon

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 190:        if (proxy.IsServerRemote)
Line 191:          ApplicationContext.SetGlobalContext(result.GlobalContext);
Line 192:        throw new DataPortalException(
Line 193:          String.Format("DataPortal.Fetch {0} ({1})", Resources.Failed, ex.InnerException.InnerException), 
Line 194:          ex.InnerException, result.ReturnObject);

Source File: C:\CSLA\csla20cs\Csla\DataPortal\Client\DataPortal.cs    Line: 192

Stack Trace: 

[NullReferenceException: Object reference not set to an instance of an object.]

[CallMethodException: DataPortal_Fetch methode aanroepen mislukt]

[DataPortalException: DataPortal.Fetch mislukt (System.NullReferenceException: Object reference not set to an instance of an object.
   at ProjectTracker.Library.Database.get_PTrackerConnection() in C:\CSLA\ProjectTracker20cs\ProjectTracker.Library\Database.cs:line 14
   at ProjectTracker.Library.ResourceList.DataPortal_Fetch(Criteria criteria) in C:\CSLA\ProjectTracker20cs\ProjectTracker.Library\ResourceList.cs:line 34)]
   Csla.DataPortal.Fetch(Type objectType, Object criteria) in C:\CSLA\csla20cs\Csla\DataPortal\Client\DataPortal.cs:192
   Csla.DataPortal.Fetch(Object criteria) in C:\CSLA\csla20cs\Csla\DataPortal\Client\DataPortal.cs:140
   ProjectTracker.Library.ResourceList.GetResourceList() in C:\CSLA\ProjectTracker20cs\ProjectTracker.Library\ResourceList.cs:17
   ResourceList.GetResourceList() in c:\CSLA\ProjectTracker20cs\www\PTWeb\ResourceList.aspx.cs:81
   ResourceList.ResourceListDataSource_SelectObject(Object sender, SelectObjectArgs e) in c:\CSLA\ProjectTracker20cs\www\PTWeb\ResourceList.aspx.cs:70
   Csla.Web.CslaDataSource.OnSelectObject(SelectObjectArgs e) in C:\CSLA\csla20cs\Csla\Web\CslaDataSource.cs:180
   Csla.Web.CslaDataSourceView.ExecuteSelect(DataSourceSelectArguments arguments) in C:\CSLA\csla20cs\Csla\Web\CslaDataSourceView.cs:93
   System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) +17
   System.Web.UI.WebControls.DataBoundControl.PerformSelect() +149
   System.Web.UI.WebControls.BaseDataBoundControl.DataBind() +70
   System.Web.UI.WebControls.GridView.DataBind() +4
   System.Web.UI.WebControls.BaseDataBoundControl.EnsureDataBound() +82
   System.Web.UI.WebControls.CompositeDataBoundControl.CreateChildControls() +69
   System.Web.UI.Control.EnsureChildControls() +87
   System.Web.UI.Control.PreRenderRecursiveInternal() +41
   System.Web.UI.Control.PreRenderRecursiveInternal() +161
   System.Web.UI.Control.PreRenderRecursiveInternal() +161
   System.Web.UI.Control.PreRenderRecursiveInternal() +161
   System.Web.UI.Control.PreRenderRecursiveInternal() +161
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1360

Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.210

leonidas replied on Wednesday, April 11, 2007

Nobody has a clue???

gr Leon

av_harris replied on Friday, May 11, 2007

I've got the same error message.

There is more discussion on the same topic here: http://forums.lhotka.net/forums/thread/13015.aspx

Unfortunately, there is no resolution.

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