EF Code First 独立数据库多上下文

Question

我先用代码创建了一个独立于数据库的软件entity framework

每个模型都可以在 mysq、mssql、oracle 等上工作

程序在启动时自动决定连接字符串。

mssql 和 mysql 在我添加 oracle 之前运行良好。现在我在配置中添加了 oracle file.after oracle 和 mysql 运行良好 mysql return 错误。

我的错误是“'System.ArgumentException' 类型的未处理异常发生在 Oracle.ManagedDataAccess.dll

附加信息：'server' 是一个无效的连接字符串属性

如您所见，mssqlcontext 尝试使用或检查 oracle 配置规则的错误消息。如何在不中断 oracle 或如何在不中断 mssql 的情况下定义 oracleconfiguration 这是我的 app.config

<?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"/>
    <section name="oracle.manageddataaccess.client"
      type="OracleInternal.Common.ODPMSectionHandler, Oracle.ManagedDataAccess, Version=4.121.2.0, Culture=neutral, PublicKeyToken=89b483f429c47342"/>
  </configSections>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5"/>
  </startup>
  <entityFramework>
    <providers>
      <provider invariantName="MySql.Data.MySqlClient" type="MySql.Data.MySqlClient.MySqlProviderServices, MySql.Data.Entity.EF6"/>
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer"/>
      <provider invariantName="Oracle.ManagedDataAccess.Client"
        type="Oracle.ManagedDataAccess.EntityFramework.EFOracleProviderServices, Oracle.ManagedDataAccess.EntityFramework, Version=6.121.2.0, Culture=neutral, PublicKeyToken=89b483f429c47342"/>
    </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"/>
      <remove invariant="Oracle.ManagedDataAccess.Client"/>
      <add name="ODP.NET, Managed Driver" invariant="Oracle.ManagedDataAccess.Client" description="Oracle Data Provider for .NET, Managed Driver"
        type="Oracle.ManagedDataAccess.Client.OracleClientFactory, Oracle.ManagedDataAccess, Version=4.121.2.0, Culture=neutral, PublicKeyToken=89b483f429c47342"/>



    </DbProviderFactories>

  </system.data>

  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <publisherPolicy apply="no"/>
        <assemblyIdentity name="Oracle.ManagedDataAccess" publicKeyToken="89b483f429c47342" culture="neutral"/>
        <bindingRedirect oldVersion="4.121.0.0 - 4.65535.65535.65535" newVersion="4.121.2.0"/>
      </dependentAssembly>
    </assemblyBinding>
  </runtime>

</configuration>

这是我在添加 oracle

之前的 app.config

<?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>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
  </startup>

  <entityFramework>
    <providers>
      <provider invariantName="MySql.Data.MySqlClient" type="MySql.Data.MySqlClient.MySqlProviderServices, MySql.Data.Entity.EF6"  />
      <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>
</configuration>

编辑 1

 public  class MSSQLDBContext : BaseDbContext, IDbContext
    {
       //yeni
        public MSSQLDBContext() : base(GlobalData.ConnStringMSSQLMigrationSysncDatabase) {

        }
        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            modelBuilder.Entity<Brand>().Property(c => c.deneme2).HasColumnType("xml");
            base.OnModelCreating(modelBuilder);
        }
    }

[DbConfigurationType(typeof(MySqlEFConfiguration))]
    public class MySQLDbContext : BaseDbContext, IDbContext
    {
        public MySQLDbContext():base(GlobalData.ConnStringMySQLMigrationSysncDatabase){}
        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            modelBuilder.Entity<Brand>().Property(c => c.deneme2).HasColumnType("LONGTEXT");
            base.OnModelCreating(modelBuilder);
        }
    }

 public class OracleDbContext: BaseDbContext, IDbContext
    {
       public OracleDbContext() : base(GlobalData.ConnStringORACLEMigrationSyncDatabase) { }




       protected override void OnModelCreating(System.Data.Entity.DbModelBuilder modelBuilder)
       {
           modelBuilder.HasDefaultSchema("SEMIH");
           base.OnModelCreating(modelBuilder);

       }
    }

Answer 1

对于 mssqldbcontex，我定义了继承自 DbConfiguration class 的新 dbConfiguration，并且我设置了它的提供程序工厂

public class mssqlConfiguration : DbConfiguration
    {
        public mssqlConfiguration()
        {
             SetProviderFactory("System.Data.SqlClient", System.Data.SqlClient.SqlClientFactory.Instance);

        }
    }

我为 oracleDbcontex 创建了新的 class，比如 mssqlDbContex

public class OracleProviderConfig : DbConfiguration
   {
       public OracleProviderConfig()
       {

           SetProviderServices("Oracle.ManagedDataAccess.Client", EFOracleProviderServices.Instance);
           SetProviderFactory("Oracle.ManagedDataAccess.Client", OracleClientFactory.Instance);

       }
   }

我在他们的 dbContext 之上调用了这个配置，就像这样

[DbConfigurationType(typeof(OracleProviderConfig))]
   public class OracleDbContext: BaseDbContext, IDbContext

我终于从 app.config

中找到了明确的供应商

<?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"/>
    <section name="oracle.manageddataaccess.client"
      type="OracleInternal.Common.ODPMSectionHandler, Oracle.ManagedDataAccess, Version=4.121.2.0, Culture=neutral, PublicKeyToken=89b483f429c47342"/>
  </configSections>
  <entityFramework>
    <providers>

    </providers>
  </entityFramework>
<system.data>

  </system.data>
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<publisherPolicy apply="no"/>
<assemblyIdentity name="Oracle.ManagedDataAccess" publicKeyToken="89b483f429c47342" culture="neutral"/>
<bindingRedirect oldVersion="4.121.0.0 - 4.65535.65535.65535" newVersion="4.121.2.0"/>
</dependentAssembly>
</assemblyBinding>
</runtime>

</configuration>

解决了

EF Code First 独立数据库多上下文

EF Code First Independent database multiple context

migration

oracle

entity-framework

code-first

database-independent