EF CODEFIRST WITH ORACLE

摸索了半天，运行通过了，但是还是有一点坑的，对于初次使用的人来说，可能会遇到几个问题

首先安装两个dll

如果你已经下载好了dll

Oracle.ManagedDataAccess.dll

Oracle.ManagedDataAccess.EntityFramework.dll

可以直接引用

接下来就是配置文件

配置文件的写法网上有好几个版本的，发现每个版本似乎都可以？提供一个版本，这些是必须的配置

  <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>
    <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="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="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>

<add name="OracleDbContext" providerName="Oracle.ManagedDataAccess.Client"
      connectionString="User Id=test;Password=test;Data Source=(DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = ))
    (CONNECT_DATA =(SERVER = DEDICATED)(SERVICE_NAME = XE)));PERSIST SECURITY INFO=True;"/>

用户权限的问题

最好给用户都赋予resource和dba权限，否则EF查询数据的时候只能查到自己插入的,查询不到sysdba用户插入的数据。插入数据的时候也会出现这种问题,如果你发现数据不同步，请检查用户权限问题。

schema的问题

[Table("BOOK",Schema ="TEST")]
    public class Book
    {
        [Key]
        public string NAME { get; set; }
 
        public int PRICE { get; set; }
 
    }

大小写的问题

EF生成的语句时代了“”的，带了引号后，区分了大小写，所以实体字段、表名、Schema一定要和数据库一致