.net-coreentity-framework-core.net-core-2.2jet-ef-provider

Error Could not load type System.Data.OleDb.OleDbConnection from assembly System.Data when using Scaffold-DbContext, EntityFrameworkCore.Jet, .NetCore


I am trying to use Scaffold-DbContext from Entity Framework Core to create Models from an existing MS Access Database.

In Package Manager Console when I run the command:

Scaffold-DbContext "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Folder\Database.mdb;" EntityFrameworkCore.Jet

I get the following error:

Could not load type 'System.Data.OleDb.OleDbConnection' from assembly 'System.Data, Version=4.0.0.0, Culture=neutral, PublicKeyToken=123123123'.

I'm using a ClassLibrary project with the following setup:

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>netcoreapp2.2</TargetFramework>
  </PropertyGroup>

  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
    <PlatformTarget>AnyCPU</PlatformTarget>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="EntityFrameworkCore.Jet" Version="2.0.0" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="2.2.4" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="2.2.4">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
    </PackageReference>
  </ItemGroup>

</Project>

I'm using the EntityFrameworkCore.Jet provider.

Both x32 and x64 OleDb Dll's are in the machine:

C:\Program Files\Common Files\microsoft shared\OFFICE14\ACEOLEDB.DLL
C:\Program Files (x86)\Microsoft Office\root\VFS\ProgramFilesCommonX86\Microsoft Shared\OFFICE16\ACEOLEDB.DLL

The x64 installed from Microsoft Access Database Engine 2010 Redistributable and the x32 from Office Professional Plus 32-bit

Scaffold SQL database works fine.

Already went to https://github.com/bubibubi/EntityFrameworkCore.Jet/wiki/Limitations

Is something missing or this setup should work? Any help would be appreciated.


Solution

  • You need to target .Net Framework.

    Actually OleDb is not ported to .Net Core. https://github.com/dotnet/corefx/issues/23542

    You can try with .Net Framework 4.6 or 4.7.