CRVS2010 Beta - Error: No valid Report Source is available

Question

I am new to using crystal reports in .NET so any (un-jargoned) help is much welcomed and appreciated.
I am implementing an web application on a Windows XP machine using VS2010 and have downloaded and installed the CR4VS2010 beta 2 and the CRforNET40_x86.  All installed OK with no errors.
I have embedded a crystal report viewer into my web page and have populated a dataset (myDS) successfully from my SQL server connection earlier in the code.
The report (stoppages.rpt) is an untyped report stored in a separate folder and has 2 datetime parameters to pass in.  When I run the web app it runs fine until the parameter boxes appear - I enter 2 valid date values into the parameter boxes when I hit OK I get an error - No valid report source is available.
My code is shown below - I have searched other forums and it was suggested to put in the session.add part but the error occurs with or without this bit in...
Please help - newbie and desparate! Thanks
Dim myReportDocument = New CrystalDecisions.CrystalReports.Engine.ReportDocument()
            myReportDocument.Load("C:\Reports\stoppages.rpt")
            myReportDocument.SetDataSource(myDS)
            Session.Add("Report", myReportDocument)
            crvThisReport.ReportSource = myReportDocument
Subject modified as per the sticky post at the top of this forum; [Crystal Reports for Visual Studio 2010 Beta - read before posting|Crystal Reports for Visual Studio 2010 Beta - read before posting;
Edited by: Ludek Uher on Oct 13, 2010 7:22 AM

Answer 1

Hi Ludek,  I tried adding
<startup useLegacyV2RuntimeActivationPolicy="true">
  <supportedRuntime version="v4.0"/>
</startup>
to the config file but it didnt resolve the problems. 
However I think I have found a work-around solution to setting the parameters programmatically rather than use the crystal report viewer pop-up boxes.  I am posting my code to help anyone else who might be experiencing the same problems:
Dim myReportDocument = New CrystalDecisions.CrystalReports.Engine.ReportDocument()
myReportDocument.Load(Server.MapPath(strRptPath))
myDS.WriteXml(Server.MapPath(strXMLPath), XmlWriteMode.WriteSchema)
myReportDocument.SetDataSource(myDS)
myReportDocument.Refresh()
myReportDocument.SetParameterValue("DateFrom", #9/1/2010 6:35:00 AM#)
myReportDocument.SetParameterValue("DateTo", #9/8/2010 6:35:00 PM#)
crvThisReport.ReportSource = myReportDocument
DateFrom and DateTo are the parameter names within my crystal report.
It seems to be working fine, it stops the crystal report viewer from displaying the parameter pop-up box which stops the error occurring.  However, the error still occurs when you want to interact with the report in other ways, ie page navigation, group tree navigation.  It still allows me to print, export and zoom in and out, so I will have to disable some buttons and features until this error is resolved - the search continues!
Thanks for all your help and advise.
Edited by: juliep68 on Oct 14, 2010 11:33 PM