c# - EntityFramework 6 不适用于 MySql

Question

我正在尝试使用我的模型并从中创建一个数据库。当我尝试基于模型生成数据库时出现以下错误:

Running transformation: System.InvalidOperationException: The SSDL generated by the activity called 'CsdlToSsdlAndMslActivity' is not valid and has the following errors:
No Entity Framework provider found for the ADO.NET provider with invariant name 'MySql.Data.MySqlClient'. Make sure the provider is registered in the 'entityFramework' section of the application config file. See http://go.microsoft.com/fwlink/?LinkId=260882 for more information.

   at Microsoft.Data.Entity.Design.DatabaseGeneration.EdmExtension.CreateAndValidateStoreItemCollection(String ssdl, Version targetFrameworkVersion, IDbDependencyResolver resolver, Boolean catchThrowNamingConflicts)
   at Microsoft.VisualStudio.TextTemplatingFED2D73CEED00C99E8A0A14FA9AE33EAFFDF3CAAFEE9E04D21CC913F1C5C88D960592C81A433C11663E61FD5459CF679CFD9B7275B72CA8BFB8D753DBB9FDDE3.GeneratedTextTransformation.get_Store() in C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\Extensions\Microsoft\Entity Framework Tools\Templates\Includes\GenerateTSQL.Utility.ttinclude:line 57
   at Microsoft.VisualStudio.TextTemplatingFED2D73CEED00C99E8A0A14FA9AE33EAFFDF3CAAFEE9E04D21CC913F1C5C88D960592C81A433C11663E61FD5459CF679CFD9B7275B72CA8BFB8D753DBB9FDDE3.GeneratedTextTransformation.TransformText() in C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\Extensions\Microsoft\Entity Framework Tools\DBGen\SSDLToSQL10.tt:line 84     C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\Extensions\Microsoft\Entity Framework Tools\Templates\Includes\GenerateTSQL.Utility.ttinclude   57

如果有任何帮助，以下包含我的 App.config:

<?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" />
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
  </configSections>
  <connectionStrings>
    <add name="SomeDatabase" providerName="MySql.Data.MySqlClient" connectionString="password=user;server=192.168.0.114;uid=hello;database=example;persistsecurityinfo=True;" />
  </connectionStrings>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
  </startup>
  <entityFramework codeConfigurationType="MySql.Data.Entity.MySqlEFConfiguration, MySql.Data.Entity.EF6">
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
    <providers>
      <provider invariantName="MySql.Data.MySqlClient" type="MySql.Data.MySqlClient.MySqlProviderServices, MySql.Data.Entity.EF6, Version=6.9.9.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d"></provider>
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
    </providers>
  </entityFramework>
  <system.data>
    <DbProviderFactories>
      <remove invariant="MySql.Data.MySqlClient" />
      <add name="MySQL Data Provider" invariant="MySql.Data.MySqlClient" description=".Net Framework Data Provider for MySQL" type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data, Version=6.9.9.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
    </DbProviderFactories>
  </system.data>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"></assemblyBinding>
  </runtime>
</configuration>

根据错误消息，我知道问题出在 MySql.Data.MySqlClient 上，但我似乎无法弄清楚它要我做什么。我已将 MySql.Data、MySql.Data.Entity.EF6 和 EntityFramework 添加到项目中。

有人知道如何解决这个问题吗？

Answer 1

我之前遇到过同样的问题。我设法通过创建一个全新的项目来解决它。

1. 转到 Manage NuGet Packages , 安装 EntityFramework , MySql.ConnectorNET.Data和 MySql.ConnectorNET.Entity .

2. 使用此处显示的连接字符串 <add name="SomeDatabase" providerName="MySql.Data.MySqlClient" connectionString="server=localhost;port=3306;database=example;uid=hello;password=user"/>

3. 添加[DbConfigurationType(typeof(MySql.Data.Entity.MySqlEFConfiguration))]在 DbContext 类中。