ReportViewer in my aspx page giving an error

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Hi guys

I draged and droped a ReportViewer in my aspx page then tried to debug the page. I got this error "Error: Sys.ArgumentNullException: Value cannot be null.
Parameter name: panelsCreated[1]" Is this normal or what?? Because am expecting atleast the viewer header to be visible here not aam error, there is no code behind.

Help this the first time am creating reports

Posted 5-Sep-11 22:19pm

Anele Ngqandu

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Al Moje · Answer 1 · 2011-09-05T23:00:00

Hi,

Which ReportViewer are you using? and what ASP framework are you using?
If this is 3.5 framework then:

Is it a:
CrystalReportViewer
or
MicrosoftReportViewer

If you are using CrystalReportViewer there should be no error
but if yor are using MicrosoftReportViewer
then you must add:

<add verb="*" path="Reserved.ReportViewerWebControl.axd" type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />

inside httpHandlers tag in you web.config.

Hope this could help...

Regards,

Algem

selim23 · Answer 2 · 2014-12-11T22:26:00

Solution 2

The issue is that ReportViewer control does not generate the report correctly.

The solution to the issue was on this link : http://support.microsoft.com/kb/2407088[^]

Posted 11-Dec-14 22:26pm

selim23