open crystal report visual studio 2008 in visual studio 2017

Question

I am migrating a WinForm Application from Visual Studio 2008 to visual Studio 2017 . My Visual studio 2008 has severals Crystal Reports . I have the same Crystal Reports installed from Visual Studio 2008.

I am working with Oracle Database. All connection to Database are working properly.

I have a winForm page where I load a ReportViewer. On form_load event I have this code

 Private Sub frmPlanification_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load
        If mDataSource Is Nothing Then Me.Close()
        Dim Reporte As New rptPlanificacionModificadaLog
        Dim Margenes As New CrystalDecisions.[Shared].PageMargins

        Reporte.SetDataSource(mDataSource)

On line

Reporte.SetDataSource(mDataSource)

This is working fine in visual Studio 2008. But in Visual studio 2017 got this error

An unhandled exception of type 'CrystalDecisions.CrystalReports.Engine.DataSourceException' occurred in CrystalDecisions.ReportAppServer.DataSetConversion.dll Additional information: Error to connect to unknown database

I do not know if is an error on database or Crystal report version.

Answer 1

I have to changed my App.Config.

  <!--<startup> <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/> </startup>--> <startup useLegacyV2RuntimeActivationPolicy="true"> <supportedRuntime version="v4.0"/> </startup>