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EF6 workflow with SQLite DDEX provider
The System.Data.SQLite DDEX provider does not support Visual Studio 2017, 2019 and 2022. This post describes how to work with SQLite and Entity Framework 6 in Visual Studio 2017/2019/2022, using the "SQLite Toolbox" DDEX provider for EF6. Notice that this provider only supports the EF 6 Tools, and not other Data Source scenarios, for example Typed DataSets. This requires Visual Studio 2017 15.8 or later.
Notice special instructions for VS 2022, since it is a 64 bit application
- Install Toolbox
- Install SQLite in GAC
- Install SQLite EF provider in project
- Run EDM Wizard
Once per Visual Studio edition (daily build at https://github.com/ErikEJ/SqlCeToolbox/wiki/Release-notes )
Once per machine. Download the latest sqlite-netFx46-setup-bundle-x86-2015-1.0.xxx.0.exe (from https://system.data.sqlite.org/index.html/doc/trunk/www/downloads-unsup.wiki)
VS 2022 File name is: sqlite-netFx46-setup-bundle-x64-2015-1.0.xxx.0.exe
Select "Full Installation"
Select: Install the assemblies into the global assembly cache - Install VS designer components
Restart Visual Studio
Verify that the EF6 provider is installed in GAC from the Toolbox "About" dialog:
If the EF6 provider is not in GAC, this may be due to an invalid entry in machine.config, located in the C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\Config folder.
VS 2022 Copy the entry to the 64 bit machince.config located in C:\WINDOWS\Microsoft.NET\Framework64\v4.0.30319\Config
The only SQLite related entry should look like this, with a version number matching the download version number (in this example .117):
<system.data>
<DbProviderFactories>
<add name="SQLite Data Provider"
invariant="System.Data.SQLite.EF6"
description=".NET Framework Data Provider for SQLite"
type="System.Data.SQLite.EF6.SQLiteProviderFactory,
System.Data.SQLite.EF6,
Version=1.0.117.0,
Culture=neutral,
PublicKeyToken=db937bc2d44ff139"
/>
</DbProviderFactories>
</system.data>
Some users report that adding this to app.config solves some runtime issues.
<provider invariantName="System.Data.SQLite" type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6" />
Install using Package Manager Console or NuGet Manager in each project.
PM> Install-Package System.Data.SQLite
Make sure to install the same version as the tools package above.
Build project!
Packages.config should look similar to this after install:
<?xml version="1.0" encoding="utf-8"?>
<packages>
<package id="EntityFramework" version="6.4.4" targetFramework="net461" />
<package id="System.Data.SQLite" version="1.0.117.0" targetFramework="net461" />
<package id="System.Data.SQLite.Core" version="1.0.117.0" targetFramework="net461" />
<package id="System.Data.SQLite.EF6" version="1.0.117.0" targetFramework="net461" />
<package id="System.Data.SQLite.Linq" version="1.0.117.0" targetFramework="net461" />
</packages>
App.config should look like this:
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
<entityFramework>
<providers>
<provider invariantName="System.Data.SQLite.EF6" type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6" />
</providers>
</entityFramework>
<system.data>
<DbProviderFactories>
<remove invariant="System.Data.SQLite.EF6" />
<add name="SQLite Data Provider (Entity Framework 6)" invariant="System.Data.SQLite.EF6" description=".NET Framework Data Provider for SQLite (Entity Framework 6)" type="System.Data.SQLite.EF6.SQLiteProviderFactory, System.Data.SQLite.EF6" />
<remove invariant="System.Data.SQLite" />
</DbProviderFactories>
</system.data>
</configuration>
Add, New Item, Data, ADO.NET Entity Data Model. Choose "EF Designer from Database" or "Code First from Database"
Use "SQLite Provider (Simple for EF6 by ErikEJ)" when creating a connection to your SQLite database file. Enter the full path to your database file in Data Source.
A reader of this wiki post has provided some additional tips here