.NET + ODT + EF6 + Oracle

Создадим консольное приложение, которое выводит данные из БД Oracle используя набор библиотек:

  • Oracle Developer Tools for Visual Studio 2019
  • EntityFramework
  • Oracle.ManagedDataAccess
  • Oracle.ManagedDataAccess.EntityFramework

Консольное приложение:

using System;
using System.Linq;

namespace ConsoleApp2
{
    class Program
    {
        static void Main(string[] args)
        {
            using (var db = new Entities())
            {
                var query = from d in db.DEPARTMENT
                                        select d;

                foreach (var l in query.ToList())
                {
                    Console.WriteLine($"Ид: {l.DEPARTMENT_ID}/ наименование: {l.DEPARTMENT_NAME} {Environment.NewLine}");
                }
            }
        }
    }
}

Файл конфигурации приложения:

<?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=4.122.19.1, Culture=neutral, PublicKeyToken=89b483f429c47342"/>
  </configSections>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2"/>
  </startup>
  <connectionStrings>
    <add name="Entities"
      connectionString="metadata=res://*/Model1.csdl|res://*/Model1.ssdl|res://*/Model1.msl;provider=Oracle.ManagedDataAccess.Client;provider connection string=&quot;DATA SOURCE=localhost:1521/XE;PASSWORD=;PERSIST SECURITY INFO=True;USER ID=&quot;"
      providerName="System.Data.EntityClient"/>
    <add name="OracleDbContext" providerName="Oracle.ManagedDataAccess.Client"
      connectionString="User Id=oracle_user;Password=oracle_user_password;Data Source=oracle"/>
  </connectionStrings>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
      <parameters>
        <parameter value="v13.0"/>
      </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=6.122.19.1, Culture=neutral, PublicKeyToken=89b483f429c47342"/>
    </providers>
  </entityFramework>
  <system.data>
    <DbProviderFactories>
      <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=4.122.19.1, 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="4.122.19.1"/>
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
  <oracle.manageddataaccess.client>
    <version number="*">
      <dataSources>
        <dataSource alias="SampleDataSource" descriptor="(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=ORCL))) "/>
      </dataSources>
    </version>
  </oracle.manageddataaccess.client>
</configuration>

Строка подключения к БД:

connectionString="metadata=res://*/Model1.csdl|res://*/Model1.ssdl|res://*/Model1.msl;provider=Oracle.ManagedDataAccess.Client;provider connection string=&quot;DATA SOURCE=localhost:1521/XE;PASSWORD=;PERSIST SECURITY INFO=True;USER ID=&quot;"
      providerName="System.Data.EntityClient"/>

Необходимые NuGet пакеты для работы с БД Oracle:

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="EntityFramework" version="6.4.0" targetFramework="net472" />
  <package id="Oracle.ManagedDataAccess" version="19.6.0" targetFramework="net472" />
  <package id="Oracle.ManagedDataAccess.EntityFramework" version="19.6.0" targetFramework="net472" />
</packages>

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