Visual Studio 2010 is asking to convert RDLC created on VS2008 to RDLC 2008 format?

Question

I've created my project on Visual Studio 2008, as well RDLC files on it. But now, when I open the solution on Visual Studio 2010 and want to open RDLC file, it's showing me a warning.

That's a little funny. The report was created on VS2008 and VS2010 is asking to convert to 2008 format. Perhaps there was a problem on my VS2008 installation that created RDLC files using some ancient format (2005??!)

The problem is, when you confirm with Ok button, do some design ajustments and run the app, it throws an error on 'Main report':

ex.InnerException
{"The definition of the report 'Main Report' is invalid."}
    [Microsoft.Reporting.DefinitionInvalidException]: {"The definition of the report 'Main Report' is invalid."}
    Data: {System.Collections.ListDictionaryInternal}
    HelpLink: null
    InnerException: {"The report definition is not valid.  Details: The report definition has an invalid target namespace 'http://schemas.microsoft.com/sqlserver/reporting/2008/01/reportdefinition' which cannot be upgraded."}
    Message: "The definition of the report 'Main Report' is invalid."
    Source: "Microsoft.ReportViewer.Common"
    StackTrace: "   at Microsoft.Reporting.ReportCompiler.CompileReport(CatalogItemContext context, Byte[] reportDefinition, Boolean generateExpressionHostWithRefusedPermissions, ReportSnapshotBase& snapshot)\r\n   at Microsoft.Reporting.StandalonePreviewStore.StoredReport.CompileReport()\r\n   at Microsoft.Reporting.StandalonePreviewStore.StoredReport.get_Snapshot()\r\n   at Microsoft.Reporting.StandalonePreviewStore.GetCompiledReport(CatalogItemContext context, Boolean rebuild, ReportSnapshotBase& snapshot)\r\n   at Microsoft.Reporting.LocalService.GetCompiledReport(CatalogItemContext itemContext, Boolean rebuild, ReportSnapshotBase& snapshot)\r\n   at Microsoft.Reporting.LocalService.CompileReport(CatalogItemContext itemContext, Boolean rebuild)\r\n   at Microsoft.Reporting.WinForms.LocalReport.CompileReport()"
    TargetSite: {Microsoft.ReportingServices.ReportProcessing.PublishingResult CompileReport(Microsoft.ReportingServices.Diagnostics.CatalogItemContext, Byte[], Boolean, Microsoft.ReportingServices.Library.ReportSnapshotBase ByRef)}

Answer 1

I experience a similar problem when converting an earlier versions of rdlc's to VS2010. The conversion is fine, what needs to happen is that the references to Microsoft.ReportViwer.Common must be changed from version 9 to version 10. Do the same with the Microsoft.ReportViewer.WebForms as well. You will also need to change all references of version 9 in the web.config and in the pages that contain the ReportViewer control to version 10. This solved all my problems and was able to modify the report in VS2010.