AspNet Core MVC view page not loading properly

Question

Dot NET CORE I am trying to add MVC view PAGE in MVC CORE web API solution. I have added the controller and view but as soon as I try to access it, it gives run time error as below.

While creating the project if I select Web Application everything works fine .But I have an existing rest API Project and this makes me create two project. I think we can extend the same project to host Rest API as well as web page if needed. Cant we ?

Startup.cs

public void Configure(IApplicationBuilder app, ILoggerFactory loggerFactory)
{
    loggerFactory.AddConsole(LogLevel.Debug);
    app.UseDeveloperExceptionPage();
    app.UseCors(options => options.AllowAnyOrigin().AllowAnyHeader().AllowAnyMethod());
    app.UseStaticFiles();
    app.UseOAuthValidation();
    app.UseOpenIddict();
    app.UseMvcWithDefaultRoute();
    app.UseStaticFiles();

    app.UseMvc(routes =>
    {
        routes.MapRoute(
            name: "default",
            template: "{controller=Home}/{action=Index}/{id?}");
    });
}

public void ConfigureServices(IServiceCollection services)
{
    services.AddCors();
    services.AddMvc();
    services.AddAutoMapper();
    services.AddDbContext<ApplicationDbContext>(options =>
    
    services.AddIdentity<ApplicationUser, IdentityRole<Guid>>()
        .AddEntityFrameworkStores<ApplicationDbContext, Guid>()
        .AddDefaultTokenProviders();
    services.AddOpenIddict<ApplicationUser, IdentityRole<Guid>, ApplicationDbContext, Guid>()
        
        .AllowAuthorizationCodeFlow()
        .AllowPasswordFlow()
        .AllowRefreshTokenFlow()
        .DisableHttpsRequirement()

        .AddEphemeralSigningKey();
    services.AddTransient<IEmailSender, AuthMessageSender>();
}

Project.json

{
  "buildOptions": {
    "emitEntryPoint": true,
    "debugType": "portable"
  },
  "dependencies": {

    "Microsoft.AspNetCore.Mvc": "1.0.0",
    "Microsoft.AspNetCore.Mvc.Formatters.Json": "1.0.0",
    "Microsoft.AspNetCore.Server.IISIntegration": "1.0.0",
    "Microsoft.AspNetCore.Server.Kestrel": "1.0.0",
    "Microsoft.Extensions.Logging.Console": "1.0.0",
    "OpenIddict": "1.0.0-alpha2-0448",
    "Microsoft.NETCore.App": {
      "type": "platform",
      "version": "1.0.0"
    },
    "Microsoft.AspNetCore.Razor.Tools": {
      "version": "1.0.0-preview2-final",
      "type": "build"
    },
    "Microsoft.AspNetCore.Mvc.TagHelpers": "1.0.0",
    "AspNet.Security.OAuth.Validation": "1.0.0-alpha2-final",
    "Microsoft.AspNetCore.StaticFiles": "1.0.0",
    "Microsoft.AspNetCore.Hosting.Abstractions": "1.0.0",
    "Microsoft.Extensions.Configuration.FileExtensions": "1.0.0",
    "Microsoft.Extensions.Configuration.Json": "1.0.0",
    "Microsoft.AspNetCore.Identity.EntityFrameworkCore": "1.0.0",
    "Microsoft.EntityFrameworkCore": "1.0.1",
    "Microsoft.EntityFrameworkCore.Design": "1.0.0-preview2-final",
    "Microsoft.EntityFrameworkCore.SqlServer": "1.0.1",
    "Microsoft.AspNetCore.Cors": "1.0.0",
    "Microsoft.AspNetCore.Authentication.OpenIdConnect": "1.0.0",
    "Microsoft.AspNetCore.Authentication.JwtBearer": "1.0.0",
    "AutoMapper": "5.1.1",
    "AutoMapper.Extensions.Microsoft.DependencyInjection": "1.1.2",
    "Microsoft.DotNet.ProjectModel": "1.0.0-rc3-003121",
    "Microsoft.AspNetCore.Diagnostics": "1.0.0-rc2-final",
    "datalayer": "1.0.0.0",
    "Common": "1.0.0-*"
  },
  "frameworks": {
    "netcoreapp1.0": { }
  },
  "tools": {
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": {
      "version": "1.0.0-preview2-final"
    },
    "Microsoft.EntityFrameworkCore.Tools": {
      "version": "1.0.0-preview2-final"
    }
  },
  "scripts": {
    "prepublish": [ "bower install" ],
    "postpublish": "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%"
  },
  "publishOptions": {
    "include": [ "wwwroot" ],
    "includeFiles": [ "appsettings.json" ]
  }
}

Controller

public class ActivationController : Controller
{
    // GET: /<controller>/
    public IActionResult Index()
    {
        return View();
    }
}

View (Index.cshtml)

<h1>Hello world!</h1>

Please, update your answer with your project.json, Startup.cs, your MVC Controller and your View. — Fabricio Koch
– Fabricio Koch, Commented Nov 11, 2016 at 10:43
Are you using a other repositories besides Nuget for your packages? I could not find the "OpenIddict" package, for example. — Fabricio Koch
– Fabricio Koch, Commented Nov 11, 2016 at 12:16

user2449952 · Accepted Answer · 2016-11-12 14:16:08Z

1

It seems we need to set preserveCompilationContext to true in project.json . It's necessary for runtime compilation of Razor views .

  "buildOptions": {
        "emitEntryPoint": true,
        "debugType": "portable",
        "preserveCompilationContext": true
      },

answered Nov 12, 2016 at 14:16

user2449952

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