使用统一容器的带有连接字符串的 EF 多构造函数："The underlying provider failed on Open"

Question

我正在使用 ef 6 和 unity 容器。当我不初始化默认的 dbcontext 构造函数时，unity 在初始化默认的 dbcontext 构造函数时无法识别控制器 injection.but，我使用

Database.SetInitializer<EfDbContext>(null);

那次它抛出 "The underlying provider failed on Open" 和 无法附加文件 Migrations.EfDbContext.mdf Db 迁移错误

public EfDbContext() : base()
{
    Database.SetInitializer<EfDbContext>(null);
}

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

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
   modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
}

来自服务的呼叫

public JsonResult Something()
{
    using (var db = new EfDbContext("con1"))
    {
        db.Database.Connection.Open();
        var data = db.Database.SqlQuery<Something>("SELECT * FROM [dbo].[Table]").ToList();
        db.Database.Connection.Close();
    }
    ..............
}

和UnityConfig

public static void RegisterComponents()
{
    var container = new UnityContainer();

    container.RegisterType(typeof(IService<>), typeof(Service<>));
    ConventionRegistrar.Configure(container);

    GlobalConfiguration.Configuration.DependencyResolver = new UnityDependencyResolver(container);
}

Answer 1

请尝试..

public EfDbContext() : this("Pass Your Default Connection String")
{

}

public EfDbContext(string connectionString) : base(connectionString)
{

}
//DBSet's

protected override void OnModelCreating(DbModelBuilder modelBuilder)  
{

 base.OnModelCreating(modelBuilder);

 Database.SetInitializer<ApplicationDbContext>(null);

 modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();

 //... Fuluent api
}

希望它能奏效。

使用统一容器的带有连接字符串的 EF 多构造函数："The underlying provider failed on Open"

EF multiple constructor with connection string using unity container : "The underlying provider failed on Open"

c#

entity-framework

unity-container