EF 6 和 SQLite 1.0.105.2 的“未找到实体框架提供程序”
[英]'No Entity Framework provider found' for EF 6 and SQLite 1.0.105.2
问题描述
I have tried some answers on similar questions for previous versions, but none seem to work:
我已经尝试了一些关于以前版本的类似问题的答案，但似乎都不起作用：
- Adding a third provider (Sqlite) to the App.config.向 App.config 添加第三个提供程序 (Sqlite)。
- Changing the connection string provider from Sqlite.EF56 to Sqlite.将连接字符串提供程序从 Sqlite.EF56 更改为 Sqlite。
What works : updating from database (after a change in Sqlite Studio).什么有效：从数据库更新（在 Sqlite Studio 中更改后）。
What doesn't work : generating a database from an updated model.什么不起作用：从更新的模型生成数据库。
Error message : No Entity Framework provider found for the ADO.NET provider with invariant name 'System.Data.Sqlite.EF6'.错误消息：未找到具有不变名称“System.Data.Sqlite.EF6”的 ADO.NET 提供程序的实体框架提供程序。
I am using Visual Studio 2015. I have installed sqlite-netFx46-setup-bundle-x86-2015-1.0.105.2.exe (for the visual designer) and then added NuGet packages like so:我正在使用 Visual Studio 2015。我已经安装了sqlite-netFx46-setup-bundle-x86-2015-1.0.105.2.exe （用于视觉设计器），然后添加了 NuGet 包，如下所示：
<package id="EntityFramework" version="6.1.3" targetFramework="net45" />
<package id="System.Data.SQLite" version="1.0.105.2" targetFramework="net45" />
<package id="System.Data.SQLite.Core" version="1.0.105.2" targetFramework="net45" />
<package id="System.Data.SQLite.EF6" version="1.0.105.2" targetFramework="net45" />
<package id="System.Data.SQLite.Linq" version="1.0.105.2" targetFramework="net45" />
My App.config:我的 App.config：
<configuration>
<configSections>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="mssqllocaldb" />
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
<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" />
<add name="SQLite Data Provider" invariant="System.Data.SQLite" description=".NET Framework Data Provider for SQLite" type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite" />
</DbProviderFactories>
</system.data>
<connectionStrings>
<add name="data03Entities" connectionString="metadata=res://*/Data.Data03.csdl|res://*/Data.Data03.ssdl|res://*/Data.Data03.msl;provider=System.Data.SQLite.EF6;provider connection string='data source="C:\Users\Frederik\Documents\Data\data03.db"'" providerName="System.Data.EntityClient" />
</connectionStrings>
</configuration>
2 个解决方案
解决方案1
0 2017-09-25 14:45:22
Make sure that DbProviderFactories and entityFramework sections are present in your main project's (start-up project) config file.确保DbProviderFactories和entityFramework部分存在于您的主项目（启动项目）配置文件中。 You probably have data access in separate project.您可能在单独的项目中拥有数据访问权限。
解决方案2
0 2020-09-16 09:39:37
in your config file:在您的配置文件中：
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="mssqllocaldb" />
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
<provider invariantName="System.Data.SQLite.EF6" type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6" />
</providers>
</entityFramework>
you need to add in providers node您需要添加提供者节点
<provider invariantName="System.Data.SQLite" type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6" />
as many devs reported that it is needed as well.正如许多开发人员报告的那样，它也是必要的。 I have also experienced that.我也有过这样的经历。
also make sure your connection string is referencing the provider "System.Data.SQLite" not "System.Data.SQLite.EF6"还要确保您的连接字符串引用提供程序“System.Data.SQLite”而不是“System.Data.SQLite.EF6”
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