ASP.NET 5 Web API project template does not allow using Entity Framework

Question

Using VS2015 Enterprise Edition, I created a web app using ASP.NET 5 Web API template as shown below. But when I try to install Entity Framework, it shows the EntityFramework under the References\DNX Core 5.0 folder (as shown in figure 2 here) with an error icon stating the DNX Core 5.0 does not support EF. But when I uninstall EF from this folder, it removes it from the References\DNX 4.5.1 folder, as well. Question: How can I use EF in an ASP.NET 5 Web API project?

project.json file:

{
  "version": "1.0.0-*",
  "compilationOptions": {
    "emitEntryPoint": true
  },

  "dependencies": {
    "Microsoft.ApplicationInsights.AspNet": "1.0.0-rc1",
    "Microsoft.AspNet.IISPlatformHandler": "1.0.0-rc1-final",
    "Microsoft.AspNet.Mvc": "6.0.0-rc1-final",
    "Microsoft.AspNet.Server.Kestrel": "1.0.0-rc1-final",
    "Microsoft.AspNet.StaticFiles": "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.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",
  },

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

  "exclude": [
    "wwwroot",
    "node_modules"
  ],
  "publishExclude": [
    "**.user",
    "**.vspscc"
  ]
}

What version of EF are you installing? And do you want to target the full .NET Framework, or .NET Core or both? — mason
– mason, Commented Mar 14, 2016 at 16:03
@mason I am installing EF 6.1.3. I need EF only for this tutorial but I want to use ASP.NET 5 Web API template instead. — nam
– nam, Commented Mar 14, 2016 at 16:09
EF 6 doesn't run on .NET Core. That's what EF 7 is for. So either don't build for .NET Core or switch to EF 7. — mason
– mason, Commented Mar 14, 2016 at 16:17
@aguafrommars Per your request, I've just added project.json file code — nam
– nam, Commented Mar 14, 2016 at 16:19

agua from mars · Accepted Answer · 2016-03-14 16:39:18Z

3

EF 6 is not compatible with .Net core. Either, remove "dnxcore50": { } from your supported framework in your project.json
For more information using EF 6 with ASP.NET Core visit : Getting Started with ASP.NET 5 and Entity Framework 6

Or use EF 7 : Visit Getting Started on ASP.NET 5

answered Mar 14, 2016 at 16:39

agua from mars

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1 Comment

nam Over a year ago

Per your suggestion, I removed "dnxcore50": { } from project.json and was able to use EF6.

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