如何将 PostgreSql 与 EntityFramework 6.0.2 集成？
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How to integrate PostgreSql with EntityFramework 6.0.2?
提问by Shakoor Alam
I am receiving following error
我收到以下错误
The 'Instance' member of the Entity Framework provider type 'Npgsql.NpgsqlServices, Npgsql, Version=2.0.14.2, Culture=neutral, PublicKeyToken=5d8b90d52f46fda7' did not return an object that inherits from 'System.Data.Entity.Core.Common.DbProviderServices'. Entity Framework providers must inherit from this class and the 'Instance' member must return the singleton instance of the provider. This may be because the provider does not support Entity Framework 6 or later; see http://go.microsoft.com/fwlink/?LinkId=260882for more information.
实体框架提供程序类型“Npgsql.NpgsqlServices、Npgsql、Version=2.0.14.2、Culture=neutral、PublicKeyToken=5d8b90d52f46fda7”的“Instance”成员没有返回从“System.Data.Entity.Core.Common”继承的对象.DbProviderServices'。实体框架提供程序必须从此类继承，并且“实例”成员必须返回提供程序的单例实例。这可能是因为提供程序不支持 Entity Framework 6 或更高版本；有关详细信息，请参阅http://go.microsoft.com/fwlink/?LinkId=260882。
Can any one help me
谁能帮我
here is my App.Config File
这是我的 App.Config 文件
<?xml version="1.0" encoding="utf-8"?>
<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>
<connectionStrings>
<add name="CacsLocal" connectionString="Server=localhost;Database=Kappa;User Id=postgres; Password=xyz;" providerName="Npgsql" />
<add name=" CacsCentral" connectionString="Server=localhost;Database=KPT1;User Id=postgres; Password=insane1234;" providerName="Npgsql" />
</connectionStrings>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
<providers>
<provider invariantName="Npgsql" type="Npgsql.NpgsqlServices, Npgsql" />
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer"></provider>
</providers>
</entityFramework>
<system.data>
<DbProviderFactories>
<add name="Npgsql Data Provider" invariant="Npgsql" description="Data Provider for PostgreSQL" type="Npgsql.NpgsqlFactory, Npgsql" />
</DbProviderFactories>
</system.data>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
</startup>
</configuration>
I have Npgsql2 version 2.0.14.2 Entity Framework 6.0.2
我有 Npgsql2 版本 2.0.14.2 实体框架 6.0.2
All the packages are installed through Package Manager by following command
所有的包都通过包管理器通过以下命令安装
Install-Package Npgsql -Pre
Install-Package EntityFramework -Pre
Thanks
谢谢
采纳答案by Francisco Junior
Check out this question: Entity Framework 6 with Npgsql
看看这个问题：Entity Framework 6 with Npgsql
It has the pointers to get it working. I hope it helps.
它有让它工作的指针。我希望它有帮助。
