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="DATA SOURCE=localhost:1521/XE;PASSWORD=;PERSIST SECURITY INFO=True;USER ID="" 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="DATA SOURCE=localhost:1521/XE;PASSWORD=;PERSIST SECURITY INFO=True;USER ID="" 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>
Tags: Oracle;C#;EF;.NET