The model item passed into the ViewDataDictionary is of type X but this ViewDataDictionary instance requires a model item of type X.

[koljada]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

The exception is thrown when running the application.

I doubled checked that the type is right, it's not an array of T, there's not duplicate types in my solution.
I found that when I comment out the model declaration in the view (@model LicenceCountChanged in my case) it's working fine. But I don't want to use dynamics and need strongly type model.
Also it seems like exception is thrown only when the model is in the same project with views. When I move the model to one layer higher(referenced class library) then it's also working fine

Expected Behavior

View is rendered without an exception

Steps To Reproduce

I cannot share my project. I'll try to create some simplified repo but it might take some time.
Here's the reproducible example:
Issue42127.zip
https://github.com/koljada/Issue42127

Exceptions (if any)

Microsoft.AspNetCore.Mvc.ViewFeatures: The model item passed into the ViewDataDictionary is of type 'PricePlanChangeFunction.LicenceCountChanged', but this ViewDataDictionary instance requires a model item of type 'PricePlanChangeFunction.LicenceCountChanged'.

.NET Version

6.0.300

Anything else?

I found this issue: #33636. The exception is exactly the same but I can't confirm it's related to hot reload. I disabled hot reload in my VisualStudio 17.2.3 but still have an issue. Also I'm not using preview version.

[koljada]

I managed to create a minimal reproducible example:
Issue42127.zip

[mkArtakMSFT]

Thanks for contacting us.
@koljada, please share your repro project as a publicly hosted GitHub repo.

Thanks for contacting us.
We're moving this issue to the .NET 7 Planning milestone for future evaluation / consideration. Because it's not immediately obvious that this is a bug in our framework, we would like to keep this around to collect more feedback, which can later help us determine the impact of it. We will re-evaluate this issue, during our next planning meeting(s).
If we later determine, that the issue has no community involvement, or it's very rare and low-impact issue, we will close it - so that the team can focus on more important and high impact issues.
To learn more about what to expect next and how this issue will be handled you can read more about our triage process here.

[koljada]

@mkArtakMSFT Here it is: https://github.com/koljada/Issue42127

We've moved this issue to the Backlog milestone. This means that it is not going to be worked on for the coming release. We will reassess the backlog following the current release and consider this item at that time. To learn more about our issue management process and to have better expectation regarding different types of issues you can read our Triage Process.

[jonsaich]

I can confirm I faced the same problem yesterday.

Microsoft.AspNetCore.Mvc.ViewFeatures: The model item passed into the ViewDataDictionary is of type 'X', but this ViewDataDictionary instance requires a model item of type 'X'.

Makes no sense because they're both the same type. Thankfully I'm able to resolve with help from the author and placing the model in another project.

[LoganNguyenDummy]

I can confirm I faced the same problem yesterday.

Microsoft.AspNetCore.Mvc.ViewFeatures: The model item passed into the ViewDataDictionary is of type 'X', but this ViewDataDictionary instance requires a model item of type 'X'.

Makes no sense because they're both the same type. Thankfully I'm able to resolve with help from the author and placing the model in another project.

I got the same issue recently, can you guide us on how to resolve this?
Regards!