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I need to find a way of building rest services in F# using the latest asp.net 5 and mvc 6 web api. Is there any direct support for this in Visual Studio 2015 as a project template? If not, could someone please put me on the right track on how to proceed? One option could be to build an F# library and then call it from a C# asp.net mvc 6 project. However I would be very interested in building a native F# mvc 6 web api. Thanks!

Google returned the following project: https://github.com/fsprojects/fsharp-dnx

The HelloFSharp sample works fine, however could not manage to make the HelloMVC project build:

  • dnu restore complains about many not found dependencies

  • dnx web has the following error: 

    System.TypeLoadException: Could not load type 'Microsoft.Extensions.Logging.ILogValues' from assembly 'Microsoft.Extensions.Logging.Abstractions, Version=1.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'.
BigONotation
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    dnu/dnx are no longer a thing, the core CLR has moved to a new cli, see here: http://www.hanselman.com/blog/ExploringTheNewNETDotnetCommandLineInterfaceCLI.aspx – Fyodor Soikin Feb 27 '16 at 16:28

1 Answers1

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F# is now supported by .net core. As of this writing, F# code can only be compiled with .net core 1.0.3 LTS. On Ubuntu 16.10, use the steps described here to add the .net core repo.

  • Make sure to install .net core 1.0.3 LTS (and not the latest .net core 1.1): sudo apt-get install dotnet-dev-1.0.0-preview2-003156
  • Create a directory for your F# project: mkdir helloworldfsharp and cd helloworldfsharp
  • In that directory: dotnet new -l f#. This will create a new F# project
  • dotnet restore. This will restore all packages and install the F# compiler.
  • dotnet build
  • dotnet run

Edit: The previous steps generates a console application. If you want to create a asp.net core mvc app, adapt the generated files as described here (as you see in the link, this is quite straightforward).

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