EntityFramework，配合Oracle.ManagedDataAccess配置Oracle数据库连接

1.环境：

windows10,vs2017,oracle 11g(32 bit),PLSQL Developer 13 (32 bit)。

2.准备工具：

下载oracle 11g，地址：https://www.oracle.com/technetwork/database/enterprise-edition/downloads/112010-win32soft-098987.html

下载ODAC for Visual Studio 2017，地址：https://www.oracle.com/technetwork/topics/dotnet/downloads/odacmsidownloadvs2017-3806459.html

下载PLSQL Developer 13(32 bit) ，地址：https://www.allroundautomations.com/bodyplsqldevreg.html

3.安装：

先oracle 11g安装；

然后安装PLSQL Developer 13(32 bit) ；

最后安装ODAC for Visual Studio 2017；

4.配置

• 安装完ODAC for Visual Studio 2017后VS扩展内有多两个DLL，直接在项目中引用

• 在映射文件中将数据映射字段，及表名全部改成大写。

5.配置config文件

加入如下节点，注意版本号

  <oracle.manageddataaccess.client>
    <version number="*">
      <dataSources>
        <dataSource alias="xxxx" descriptor="(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=xxxx))) " />
      </dataSources>
      <edmMappings>
        <edmMapping dataType="number">
          <add name="bool" precision="1" />
          <add name="byte" precision="2" />
          <add name="int16" precision="5" />
        </edmMapping>
      </edmMappings>
    </version>
  </oracle.manageddataaccess.client>
  <connectionStrings>
    <add name="xxxx" providerName="Oracle.ManagedDataAccess.Client" connectionString="User Id=xxxx;Password=xxxx;Data Source=xxxx" />
  </connectionStrings>

注意这边的Data Source与xml中节点的名称一样<dataSource /> ，这里的<edmMappings>还可以增加int32，及int64。

若出现连接错误，可以在connectionString中加入Persist Security Info=True;

  <entityFramework>
    <!--<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />-->
    <defaultConnectionFactory type="Oracle.ManagedDataAccess.EntityFramework.OracleConnectionFactory, Oracle.ManagedDataAccess.EntityFramework, Version=6.122.1.0, Culture=neutral, PublicKeyToken=89b483f429c47342" />
    <providers>
      <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=6.122.1.0, Culture=neutral, PublicKeyToken=89b483f429c47342" />
    </providers>
  </entityFramework>

  <system.data>
    <DbProviderFactories>
      <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=4.122.1.0, Culture=neutral, PublicKeyToken=89b483f429c47342" />
    </DbProviderFactories>
  </system.data>

  <configSections>
    <section name="oracle.manageddataaccess.client" type="OracleInternal.Common.ODPMSectionHandler, Oracle.ManagedDataAccess, Version=4.122.1.0, Culture=neutral, PublicKeyToken=89b483f429c47342" />
  </configSections>

来个完整点的，但是这个没有数据连接节点

<?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=4.122.1.0, Culture=neutral, PublicKeyToken=89b483f429c47342" />
  </configSections>
  <system.data>
    <DbProviderFactories>
      <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=4.122.1.0, Culture=neutral, PublicKeyToken=89b483f429c47342" />
    </DbProviderFactories>
  </system.data>
  <entityFramework>
    <defaultConnectionFactory type="Oracle.ManagedDataAccess.EntityFramework.OracleConnectionFactory, Oracle.ManagedDataAccess.EntityFramework, Version=6.122.1.0, Culture=neutral, PublicKeyToken=89b483f429c47342" />
    <providers>
      <provider invariantName="Oracle.ManagedDataAccess.Client" type="Oracle.ManagedDataAccess.EntityFramework.EFOracleProviderServices, Oracle.ManagedDataAccess.EntityFramework, Version=6.122.1.0, Culture=neutral, PublicKeyToken=89b483f429c47342" />
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer"/>
    </providers>
  </entityFramework>
</configuration>

6.代码修改

在DbContext中OnModelCreating方法内增加一句

modelBuilder.HasDefaultSchema("xxxx");这里的xxxx是指用户名，我用的是SYSTEM。

配置完后可以使用EF的代码迁移进行建表。

7.踩坑指南：

• oracle数据库32位的，那么PLSQL 也要32位的。
• nuget上的Oracle.ManagedDataAccess及Oracle.ManagedDataAccess.EntityFramework我试了，不过我这边不能用，不知道其他人如何。
• string类型的模型字段值，最好给个长度。不然在取值时会出现错误。
• 数据库表名及属性长度30位
• 使用ABP框架请在模块配置文件中配置（该配置很重要）

1. Database.SetInitializer(new CreateDatabaseIfNotExists<ServerOracleDbContext>());
2. Configuration.UnitOfWork.IsolationLevel = System.Transactions.IsolationLevel.ReadCommitted;