Question

我无法使Entity Framework在我的项目中使用Oracle Provider（ODP.NET）。

设置：

针对.NET Framework 4.7.2的ASP.NET Core MVC 2.1
EntityFramework 6.2
ODP.NET 18.3（Oracle.ManagedDataAccess和Oracle.ManagedDataAccess.EntityFramework）

尽管我更喜欢使用EF Core，但我不能这样做，因为Oracle尚不支持EF Core，仅支持.NET Core。

我收到的错误表明该应用程序正在尝试使用SQL Server驱动程序。

我无法在线找到适合我的情况的示例。带有EF6 / ODP.NET的MVC5，或带有EF的Oracle的.NET Core示例。

我的假设是问题在于MVC5中通过web.config / app.config对其进行配置。我假设我需要在start.cs中配置Oracle，但是需要正确的语法。

我为Context类编写的代码：

public class MainContext : DbContext
    {
        public MainContext(string connectionString) : base(connectionString)
        {
            Database.SetInitializer<MainContext>(null);
        }

        public virtual DbSet<ApplicationSetting> ApplicationSettings { get; set; }
    }

然后我创建了一个工厂：

public class MainContextFactory : IDbContextFactory<MainContext>

{
    private readonly string _connectionString;

    public MainContextFactory(string connectionString)
    {
        _connectionString = connectionString;
    }

    public MainContext Create()
    {
        return new MainContext(_connectionString);
    }
}

在Startup.cs中，我有：

public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvc()
                .SetCompatibilityVersion(CompatibilityVersion.Version_2_1)

            services.AddTransient<IDbContextFactory<MainContext>>(d =>
                new MainContextFactory(Configuration["ConnectionStrings:Primary"]));

我从我的存储库项目（目标是.NET 4.7.2）中调用它，并且包含MainContext：

public class ApplicationSettingRepository : BaseDbRepository, IApplicationSettingRepository
{
    private readonly ILogger<ApplicationSettingRepository> _logger;

    public ApplicationSettingRepository(ILogger<ApplicationSettingRepository> logger, 
                                        IUserContext userContext,
                                        IDbContextFactory<MainContext> dbContextFactory) : base(userContext, dbContextFactory)
    {
        _logger = logger;
    }

    /// <summary>
    /// Get All Application Settings
    /// </summary>
    public async Task<List<IApplicationSetting>> GetAllAsync()
    {
        var list = new List<IApplicationSetting>();

        using (var db = _contextFactory.Create())
        {
            list.AddRange(await db.ApplicationSettings.ToListAsync());
        }

        return list;
    }

调用基本存储库类：

public abstract class BaseDbRepository : IBaseRepository
{
    protected IDbContextFactory<MainContext> _contextFactory;

    public IUserContext UserContext { get; set; }

    protected BaseDbRepository(IUserContext userContext, IDbContextFactory<MainContext> dbContextFactory)
    {
        UserContext = userContext;
        _contextFactory = dbContextFactory;
    }
}

问题：

我需要更新或添加什么才能使其称为ODP.NET提供程序？
是否有更好的配置方法？

Answer 1

要关联Oracle Provider：

使用MVC5中web.config中的值更新add.config：

<configuration>
  <configSections>
    <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=4.122.18.3, Culture=neutral, PublicKeyToken=89b483f429c47342" />
  </configSections>
  <runtime>
    <gcServer enabled="true"/>
  </runtime>
  <entityFramework>
    <providers>
      <provider invariantName="Oracle.ManagedDataAccess.Client" type="Oracle.ManagedDataAccess.EntityFramework.EFOracleProviderServices, Oracle.ManagedDataAccess.EntityFramework, Version=6.122.18.3, 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=4.122.18.3, Culture=neutral, PublicKeyToken=89b483f429c47342" />
    </DbProviderFactories>
  </system.data>
  <oracle.manageddataaccess.client>
    <version number="*">
     <dataSources></dataSources>
    </version>
  </oracle.manageddataaccess.client>
</configuration>

然后在startup.cs中的services.AddMvc（）之后添加：

services.AddScoped(provider =>
            {
                return new OracleDbContext(Configuration["ConnectionString"]);
            });

贷记到Tony Sneed Post。

面向.NET 4.7.2的ASP.NET Core上的ODP.NET和EF6配置

1 个答案: