Rendering dynamics views in Razor (chtml), How to add a FileProvider to razor in asp.net core 3.0?

Question

I am migrating from asp-net core 2.2 to asp-net core 3.0, I was using this block to define my File Class Provider, as you know this is used to create dynamic razor views (dynamic cshtml), my problem is that segment does not work.

I have implemented the classic:

services.Configure<RazorViewEngineOptions>(opts =>
                opts.FileProviders.Add( 
                    new MyCostumizedFileProvider()
                )
            );

Where:

MyCostumizedFileProvider : is the Implementation of File Provider.
RazorViewEngineOptions : is the handler of the Razor runtime compilator used in aspnet core 2.0.

In asp-net core I have checked

Example like:

services.Configure<MvcRazorRuntimeCompilationOptions>(options => {
    options.FileProviders.Clear();
    options.FileProviders.Add(new MyCostumizedFileProvider());
});

or

  services.Configure<MvcRazorRuntimeCompilationOptions>(options => {
   options.FileProviders.Add(new MyCostumizedFileProvider());
  });

The error is always:

/Pages/Shared/ViewListPerson_1b2b2019-aad9-4096-a3b7-ece5dfe586c1.cshtml
   at Microsoft.AspNetCore.Mvc.ViewEngines.ViewEngineResult.EnsureSuccessful(IEnumerable`1 originalLocations)
   at Microsoft.AspNetCore.Mvc.ViewFeatures.ViewResultExecutor.ExecuteAsync(ActionContext context, ViewResult result)
   at Microsoft.AspNetCore.Mvc.ViewResult.ExecuteResultAsync(ActionContext context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResultFilterAsync>g__Awaited|29_0[TFilter,TFilterAsync](ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResultExecutedContextSealed context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.ResultNext[TFilter,TFilterAsync](State& next, Scope& scope, Object& state, Boolean& isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeResultFilters()
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|24_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeFilterPipelineAsync()
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Logged|17_1(ResourceInvoker invoker)
   at Microsoft.AspNetCore.Builder.RouterMiddleware.Invoke(HttpContext httpContext)
   at Microsoft.AspNetCore.Builder.RouterMiddleware.Invoke(HttpContext httpContext)
   at Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

Do you have a clue, solution? or Do you know other way to inject FileProviders?

Have you tried something like this? `services.AddControllersWithViews().AddRazorRuntimeCompilation(options => options.FileProviders.Add(new PhysicalFileProvider(appDirectory)));` — DavidG, Oct 08 '19 at 15:28
RazorViewEngineOptions for FileProviders in ASP.NET Core 3.0 #14593 https://github.com/aspnet/AspNetCore.Docs/issues/14593 — Fabio Andrés, Oct 08 '19 at 15:45

score 10 · Accepted Answer · answered Oct 08 '19 at 15:47

10

For ASP.NET MVC Core 3, this is the way to add a file provider:

services.AddControllersWithViews()
    .AddRazorRuntimeCompilation(options => options.FileProviders.Add(
        new PhysicalFileProvider(appDirectory)));

answered Oct 08 '19 at 15:47

DavidG

113,891
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This is awesome, as it also works in [Razor Class Libraries (RCL)](https://learn.microsoft.com/en-us/aspnet/core/razor-pages/ui-class?view=aspnetcore-3.1&tabs=visual-studio) and even in [JetBrains Rider](https://www.jetbrains.com/rider/). – Uwe Keim Oct 27 '20 at 12:54
Requires adding nuget Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation – Stefan Steiger Nov 29 '20 at 20:59

Fabio Andrés · Answer 2 · 2023-05-23T17:31:40.087

1

DavidG provided us the solution: (I have tested and it works).

The solution is:

services.AddControllersWithViews().AddRazorRuntimeCompilation(
    options => options.FileProviders.Add(new PhysicalFileProvider(appDirectory)));

In this case:

services.AddControllersWithViews().AddRazorRuntimeCompilation(
    options => options.FileProviders.Add(new MyCostumizedFileProvider()));

Make sure to add this library: Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation

edited May 23 '23 at 17:31

answered Oct 08 '19 at 15:43

Fabio Andrés

229
2
11

2

You should let the person who commented actually add the answer. – DavidG Oct 08 '19 at 15:45
1

This solution worked after adding Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation NuGet package to the project. – llessurt May 22 '23 at 12:20

Rendering dynamics views in Razor (chtml), How to add a FileProvider to razor in asp.net core 3.0?

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