How to reference 32bit dll in .NET Winform project

Anthony Pfeffer 0

Hi,

We try to migrate a WinForm UI app from Framework 4.8 to .NET7.

Our project reference a UI Library (DevComponent) which is a 32 bits dll and we cork with VS2022.

When we copy a Form to the new project, the project compile but no way to see the form in the VS designer. The form is empty, no control.

Is there a way to do that ?

Tianyu Sun-MSFT 32,861 Reputation points Microsoft Vendor

2023-07-11T02:57:43.55+00:00

Hello @Anthony Pfeffer ,

Welcome to Microsoft Q&A forum.

Is this issue reproducible on your side in a newly created .NET 7 project? Can you confirm that if this issue appears when referencing the specific 32 bits dll(DevComponent) or it appears when referencing any 32 bits dll? Does VS show any error message?

Besides, if you try to update and use the latest version of VS 2022, will the same issue appear?

Anthony Pfeffer 0

When I create the .NET7 Winform Project I have these errors when loading Form1.cs.

I forgot to precise than my component library I want to reference is on Framework 4.8. And I don't know if it's possible to do that.

After, I can't confirm that this issue appears only with this specific 32 bits dll, We have no more component library to test.

[07:14:04.375056] fail: OutputGroupService didn't return output group DesignerRuntimeImplementationProjectOutputGroup.

                        Pour plus d’informations sur la résolution des problèmes du concepteur, consultez le guide sur https://aka.ms/winforms/designer/troubleshooting.
[07:14:04.377018] fail: Could not retrieve DesignerRuntimeImplementationProjectOutputGroup for current project.

                        Pour plus d’informations sur la résolution des problèmes du concepteur, consultez le guide sur https://aka.ms/winforms/designer/troubleshooting.
[07:14:04.387472] fail: System.InvalidOperationException: Le chargement du concepteur a rencontré une erreur. Assurez-vous que le projet peut être généré avec succès.
                           à Microsoft.DotNet.DesignTools.Client.Host.ProjectInfoProvider.NetCore.<GetNetCoreProjectInfoAsync>d__6.MoveNext()
                        --- Fin de la trace de la pile à partir de l'emplacement précédent au niveau duquel l'exception a été levée ---
                           à System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
                           à System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
                           à Microsoft.DotNet.DesignTools.Client.Host.ProjectInfoProvider.<GetProjectInfoAsync>d__9.MoveNext()
                        --- Fin de la trace de la pile à partir de l'emplacement précédent au niveau duquel l'exception a été levée ---
                           à System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
                           à System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
                           à Microsoft.DotNet.DesignTools.Client.Host.ServerHostFactory.<CreateHostAsync>d__8.MoveNext()
                        --- Fin de la trace de la pile à partir de l'emplacement précédent au niveau duquel l'exception a été levée ---
                           à System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
                           à System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
                           à Microsoft.DotNet.DesignTools.Client.DesignToolsClientLoader.<CreateClientAsync>d__29.MoveNext()

                        Pour plus d’informations sur la résolution des problèmes du concepteur, consultez le guide sur https://aka.ms/winforms/designer/troubleshooting.
[07:14:04.799452] warn: Cannot update selection in server process as Session is not connected.
[07:14:43.218385] warn: Cannot update selection in server process as Session is not connected.

Tianyu Sun-MSFT 32,861 Reputation points Microsoft Vendor

2023-07-20T08:25:58.2433333+00:00

Hi @Anthony Pfeffer ,

Does restarting VS and reopening your project work?

Looks like even creating a new .Net7 WinForm project, the designer cannot be loaded correctly. I may suggest try to reset VS settings(run devenv /ResetSettings in VS Developer Command Prompt) and repair VS(from VS Installer > More > Repair). Please also try to reload project > right-click your project > Unload Project > right-click it again > Reload Project.

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