.Net 8 SDK - AddRazorRuntimeCompilation error - Index.cshtml not found

[NISPico]

Is there an existing issue for this?

• [X] I have searched the existing issues

Describe the bug

We have an .net 6 project that runs MVC, and when we install the .Net 8 SDK on our local machine, and run the project, we get the error: The view 'Index' was not found. The following locations were searched: /Views/Content/Index.cshtml /Views/Shared/Index.cshtml /Pages/Shared/Index.cshtml

We found that adding

builder.Services.AddControllersWithViews().AddRazorRuntimeCompilation(); to program.cs

fixes the issue, but this could potentially break multiple sites, if the server running the site gets the .net 8 SDK

Expected Behavior

No response

Steps To Reproduce

Have an older .net project either 6 or 7 that runs mvc. Install .net 8 SDK on local machine Now the compiler cant find the index.cshtml file.

Exceptions (if any)

The view 'Index' was not found. The following locations were searched: /Views/Content/Index.cshtml /Views/Shared/Index.cshtml /Pages/Shared/Index.cshtml

.NET Version

.net 6

Anything else?

No response

[rglobisch-bpc]

I'm experiencing the same issue.

[Alejatabares]

I'm experiencing the same issue.

[SalehAhmadi]

This is how i managed to solve my issue. In Program.cs, I changed this line: .UseContentRoot(Directory.GetCurrentDirectory()) to this: .UseContentRoot(Path.GetDirectoryName(System.Reflection.Assembly.GetEntryAssembly().Location)) and the problem was solved. Hope this helps.

[LucGosso]

Same problem when installed SDK 8.0.203 on local machine. .net6 solution broke. net8 too.

builder.Services.AddControllersWithViews().AddRazorRuntimeCompilation(); fixes it locally,

But now i have same problem then pushing the solution to web app in azure with LTS 8 on webapp. Had to restore backup to .net6.

UseContentRoot fix do not work on web app.

[Swellenator]

I also have this issue. Adding

builder.Services.AddControllersWithViews().AddRazorRuntimeCompilation(); fixes it on my machine, but when deployed to an Azure App Service the error is still there.

[gamerwalt]

Same issue here.

[MarcelChirtes]

I downgraded my dotnet sdk to 8.0.100 not it took me two hours to remember what I did last time to make it work...

$ dotnet --list-sdks
8.0.100 [C:\Program Files\dotnet\sdk]
8.0.101 [C:\Program Files\dotnet\sdk]
8.0.102 [C:\Program Files\dotnet\sdk]
8.0.204 [C:\Program Files\dotnet\sdk]

Then where .sln is located add global.json with

{
  "sdk": {
    "version": "8.0.100"
  }
}

Until they provide a real solution here, for me .AddRazorRuntimeCompilation() did not worked, was not recognized even with the nuget packaged installed, maybe because it's a shared razor library.

[Scriptman]

I'm currently having the same issue.

Debugging with VS is working fine (runtime compilation enabled).

But publishing is not working.

Compiled on my laptop, running 8.0.200, results in InvalidOperationException: The view 'Index' was not found. Compiled on an Ubuntu server running 8.0.105, results in InvalidOperationException: The view 'Index' was not found.

So my site is looking fantastic online with a 500 - Internal Server Error page :)

[simon-wacker]

I experience the same error in the branch https://github.com/building-envelope-data/metabase/pull/187 of a public project with the as-of-this-writing latest runtime 8.0.3 available on https://hub.docker.com/_/microsoft-dotnet-aspnet regarding for example the view /Views/Authorization/Logout. Enabling runtime compilation solves the issue in development but not in the published production version. In production, I publish the project in a Docker container based on the image Dockerfile-production.

[simon-wacker]

In my case, I figured out that view compilation does not retain the directory structure. For example, the view /Views/Authorization/Logout.cshtml is compiled as Logout.cshtml. The corresponding log output is Initializing Razor view compiler with compiled view: '/Logout.cshtml'. That is why the view lookup failed with the log outputs Could not find a file for view at path '/Views/Authorization/Logout.cshtml'. and Could not find a file for view at path '/Views/Shared/Logout.cshtml'. To fix the lookup I added a view-location format without directory structure by calling services.AddControllersWithViews().AddRazorOptions(_ => { _.ViewLocationFormats.Add("/{0}.cshtml"); }. I would rather have liked to change the view compileation such that it retains/respects the directory structure. I couldn't figure out how to do that though. I hope this helps someone somehow.