Cant Run Default ASP.NET Web App In Visual Studio Code for Mac

Question

Just starting up an ASP.NET project with Visual Studio Code on a Mac

I've been through all the usual steps, ending with the dnu restore command which completed successfully.

I then run dnx web and I get a running localhost:5000 - but when I browse to that address there is no content.

In the terminal window I can see the error below (sorry I haven't included all of it as it's quite verbose).

info: Microsoft.Extensions.DependencyInjection.DataProtectionServices[0]
      User profile is available. Using '/Users/deanchalk/.local/share/ASP.NET/DataProtection-Keys' as key repository; keys will not be encrypted at rest.
Hosting environment: Production
Now listening on: http://localhost:5000
Application started. Press Ctrl+C to shut down.
info: Microsoft.AspNet.Hosting.Internal.HostingEngine[1]
      Request starting HTTP/1.1 GET http://localhost:5000/  
info: Microsoft.AspNet.Mvc.Controllers.ControllerActionInvoker[1]
      Executing action method firstmacaspnetapp.Controllers.HomeController.Index with arguments () - ModelState is Valid'
fail: Microsoft.AspNet.Diagnostics.ExceptionHandlerMiddleware[0]
      An unhandled exception has occurred: Unable to resolve service for type 'Microsoft.Dnx.Compilation.ILibraryExporter' while attempting to activate 'Microsoft.AspNet.Mvc.Razor.Compilation.RoslynCompilationService'.
      System.InvalidOperationException: Unable to resolve service for type 'Microsoft.Dnx.Compilation.ILibraryExporter' while attempting to activate 'Microsoft.AspNet.Mvc.Razor.Compilation.RoslynCompilationService'.
        at Microsoft.Extensions.DependencyInjection.ServiceLookup.Service.PopulateCallSites (Microsoft.Extensions.DependencyInjection.ServiceProvider provider, ISet`1 callSiteChain, System.Reflection.ParameterInfo[] parameters, Boolean throwIfCallSiteNotFound) [0x00000] in <filename unknown>:0 
        at Microsoft.Extensions.DependencyInjection.ServiceLookup.Service.CreateCallSite (Microsoft.Extensions.DependencyInjection.ServiceProvider provider, ISet`1 callSiteChain) [0x00000] in <filename unknown>:0 
        at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetResolveCallSite (IService service, ISet`1 callSiteChain) [0x00000] in <filename unknown>:0 
        at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetServiceCallSite (System.Type serviceType, ISet`1 callSiteChain) [0x00000] in <filename unknown>:0 
        at Microsoft.Extensions.DependencyInjection.ServiceLookup.Service.PopulateCallSites (Microsoft.Extensions.DependencyInjection.ServiceProvider provider, ISet`1 callSiteChain, System.Reflection.ParameterInfo[] parameters, Boolean throwIfCallSiteNotFound) [0x00000] in <filename unknown>:0 
        at Microsoft.Extensions.DependencyInjection.ServiceLookup.Service.CreateCallSite (Microsoft.Extensions.DependencyInjection.ServiceProvider provider, ISet`1 callSiteChain) [0x00000] in <filename unknown>:0

I've googled around and cannot find any info.

My project.json looks like this:

{
  "version": "1.0.0-*",
  "userSecretsId": "aspnet5-firstmacaspnetapp-88915393-5f54-4e2d-9285-912b92370fb0",
  "compilationOptions": {
    "emitEntryPoint": true
  },
  "tooling": {
    "defaultNamespace": "firstmacaspnetapp"
  },

  "dependencies": {
    "EntityFramework.Commands": "7.0.0-rc1-final",
    "EntityFramework.SQLite": "7.0.0-rc1-final",
    "EntityFramework.MicrosoftSqlServer": "7.0.0-rc1-final",
    "Microsoft.AspNet.Authentication.Cookies": "1.0.0-rc1-final",
    "Microsoft.AspNet.Diagnostics.Entity": "7.0.0-rc1-final",
    "Microsoft.AspNet.Identity.EntityFramework": "3.0.0-rc1-final",
    "Microsoft.AspNet.IISPlatformHandler": "1.0.0-rc1-final",
    "Microsoft.AspNet.Mvc": "6.0.0-rc1-final",
    "Microsoft.AspNet.Mvc.TagHelpers": "6.0.0-rc1-final",
    "Microsoft.AspNet.Server.Kestrel": "1.0.0-rc1-final",
    "Microsoft.AspNet.StaticFiles": "1.0.0-rc1-final",
    "Microsoft.AspNet.Tooling.Razor": "1.0.0-rc1-final",
    "Microsoft.Dnx.Runtime":"1.0.0-rc1-final",
    "Microsoft.Extensions.CodeGenerators.Mvc": "1.0.0-rc1-final",
    "Microsoft.Extensions.Configuration.FileProviderExtensions" : "1.0.0-rc1-final",
    "Microsoft.Extensions.Configuration.Json": "1.0.0-rc1-final",
    "Microsoft.Extensions.Configuration.UserSecrets": "1.0.0-rc1-final",
    "Microsoft.Extensions.Logging": "1.0.0-rc1-final",
    "Microsoft.Extensions.Logging.Console": "1.0.0-rc1-final",
    "Microsoft.Extensions.Logging.Debug": "1.0.0-rc1-final"
  },

  "commands": {
    "web": "Microsoft.AspNet.Server.Kestrel",
    "ef": "EntityFramework.Commands"
  },

  "frameworks": {
    "dnx451": { },
    "dnxcore50": { }
  },

  "exclude": [
    "wwwroot",
    "node_modules",
    "bower_components"
  ],
  "publishExclude": [
    "**.user",
    "**.vspscc"
  ],
  "scripts": {
    "prepublish": [
      "npm install",
      "bower install",
      "gulp clean",
      "gulp min"
    ]
  }
}

Does anyone have any ideas ?

I had the same error with Visual Studio on Windows. In my case I was accidentally running my project with all the rc1 packages on an rc2 runtime. After switching the runtime it was fine. Maybe you have a similar problem. — NicolasR, Nov 27 '15 at 17:16

score 0 · Answer 1 · answered Dec 02 '15 at 19:29

0

Type

dnvm list

into the terminal when in your project folder. Then check your project.json for all the projects to see if the correct versions are listed for dependencies.

Then run

dnu restore

That solved it for me on OSX.

answered Dec 02 '15 at 19:29

af0l

1

ah man - your idea looked soooooo promising, but when i managed to get everything on the right version, it made no difference at all. Thanks anyway - and if you have any other ideas i'd be grateful - all I want to do is get as asp.net site up on my mac and its proving to be an impossible task – Dean Chalk Dec 06 '15 at 15:47
I **have** it running on my Mac :) Could you check what `dnvm list` returns on your Mac? – af0l Dec 07 '15 at 16:20
http://stackoverflow.com/questions/34201252/dnx-web-error-500-when-try-to-execute @af0l can you check it please? – chemitaxis Dec 10 '15 at 11:58

score 0 · Answer 2 · answered Feb 21 '16 at 05:20

So, I got this error as well when I was setting up my asp.net project on my Mac. I fixed it by upgrading Mono (if that's the library you are using. Core should be upgraded if you are using that). To upgrade, use this for mono from terminal:

dnvm upgrade -r mono

Use this to upgrade core from terminal:

dnvm upgrade -r coreclr

I then ran dnu restore just to be sure and then dnx web and I was able to pull it up on http://localhost:5000/

Note: I made all of the other upgrades first, so this may have been the last problem (if you know what I mean). Worth a shot though, and it worked for me.

Cant Run Default ASP.NET Web App In Visual Studio Code for Mac

2 Answers2

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