You might see that the Dropbox Community team have been busy working on some major updates to the Community itself! So, here is some info on what’s changed, what’s staying the same and what you can expect from the Dropbox Community overall.

Forum Discussion

Oskar's avatar
Oskar
Helpful | Level 6
8 years ago

Dropbox API 2 supports .Net Core 1.1?

Hi,

 

I have an ASP.Net Core 1.1.1 app that uses the DropBox API. When starting Visual Studio 2017 I get an error message:

 

Package Dropbox.Api 4.3.0 is not compatible with netcoreapp1.1 (.NETCoreApp,Version=v1.1). Package Dropbox.Api 4.3.0 supports:  - net45 (.NETFramework,Version=v4.5)  - portable-dnxcore50+net45+win8+wp8+wpa81 (.NETPortable,Version=v0.0,Profile=net45+wp80+win8+wpa81+dnxcore50)  - portable-net40+sl5+win8+wp8+wpa81 (.NETPortable,Version=v0.0,Profile=Profile328)

 

However, this message disappears when I compile and things seem to run just fine, except when I do Unit tests (XUnit). Then I get this error :

 

System.AggregateException : One or more errors occurred. (Could not load file or assembly 'Dropbox.Api, Version=4.0.0.0, Culture=neutral, PublicKeyToken=310f0e82fbb45d01'. The system cannot find the file specified.)

---- System.IO.FileNotFoundException : Could not load file or assembly 'Dropbox.Api, Version=4.0.0.0, Culture=neutral, PublicKeyToken=310f0e82fbb45d01'. The system cannot find the file specified.

   at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)

   at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)

   at xUnitTest.test.FeedsAdminControllerShould.ReturnViewAndProperModelForPostEdit() ....[rest removed]

 

-What is going on here? How come the app works fine, but fails when testing?

-Is there an older cached version hanging around or something?

-Should Dropbox.Api 4.3.0 be compatible with .net core? If not, which version of Dropbox API should I use?

-Has this anything to do with the phasing out of version 1 of the API?

 

Any and all comments are appreciated,

Oskar

 

API
  • Qiming Y.'s avatar
    Qiming Y.
    8 years ago

    The SDK supports .Net Core 1.1. You just need to make sure you have

    • <PackageTargetFallback>portable-net45+win8</PackageTargetFallback> added to both main and test projects.
    • Microsoft.NETCore.Portable.Compatibility nuget package installed for main project.
    • Visual studio doesn't return any error when the build process tries to restore nuget packages. Sometimes the restore may fail due to error like "Unable to resolve ...  for '.NETCoreApp,Version=v1.1'". If that happens you may need to re-open visual studio / re-add the project. Then a clean and re-build should remove the error.

    If the issue still persist please let us know.

     

    Thanks,

    Qiming

     

  • Greg-DB's avatar
    Greg-DB
    Icon for Dropbox Staff rankDropbox Staff
    8 years ago
    This isn't related to API v1 (the .NET SDK only uses API v2 to begin with). The API .NET SDK should work with .NET Standard 1.1+, though it may require some extra configuration.

    If you are using project.json, you need to add portable-net45+win8 to imports under you frameworks section. If you are using .csproj file, you need to add <PackageTargetFallback>portable-net45+win8</PackageTargetFallback> element to your project.
    • Oskar's avatar
      Oskar
      Helpful | Level 6
      8 years ago

      Hi Greg,

       

      Thanks for your quick response.

       

      I have already this in my .csproj -file.

      <PackageTargetFallback>$(PackageTargetFallback);dotnet5.6;portable-net45+win8</PackageTargetFallback>

      It comes as a default.

       

      Adding or replacing the element you sent doesn't seem to make any difference

       

      Oskar

       

       

  • Qiming Y.'s avatar
    Qiming Y.
    Icon for Dropbox Staff rankDropbox Staff
    8 years ago

    The SDK supports .Net Core 1.1. You just need to make sure you have

    • <PackageTargetFallback>portable-net45+win8</PackageTargetFallback> added to both main and test projects.
    • Microsoft.NETCore.Portable.Compatibility nuget package installed for main project.
    • Visual studio doesn't return any error when the build process tries to restore nuget packages. Sometimes the restore may fail due to error like "Unable to resolve ...  for '.NETCoreApp,Version=v1.1'". If that happens you may need to re-open visual studio / re-add the project. Then a clean and re-build should remove the error.

    If the issue still persist please let us know.

     

    Thanks,

    Qiming

     

    • Oskar's avatar
      Oskar
      Helpful | Level 6
      8 years ago

      Hi Qiming,

       

      Thanks for your reply.

       

      I was missing the PackageTargetFallback -tag in the test project. That solved it. Thanks a million.

       

      I do not have the Microsoft.NETCore.Portable.Compatibility -package installed. Things seem to work without it. Under what circumstances would I need to install this package?

       

      All the best,

      Oskar

       

      • Qiming Y.'s avatar
        Qiming Y.
        Icon for Dropbox Staff rankDropbox Staff
        8 years ago

        Your code may not be able to compile if you call async method in the SDK without Microsoft.NETCore.Portable.Compatibility installed. If your code already compiles and works fine then you don't have to install it.

About Dropbox API Support & Feedback

Node avatar for Dropbox API Support & Feedback

Find help with the Dropbox API from other developers.

5,877 PostsLatest Activity: 12 months ago
325 Following

If you need more help you can view your support options (expected response time for an email or ticket is 24 hours), or contact us on X or Facebook.

For more info on available support options for your Dropbox plan, see this article.

If you found the answer to your question in this Community thread, please 'like' the post to say thanks and to let us know it was useful!