我首先使用具有entityFramework代码的工作单元模式。现在我想用Autofac来注册UnitOfWork，Repositories和My dbContext。使用构造函数的Autofac
这是我的UnitOfWork代码：
public class UnitOfWork : IUnitOfWork
{
private readonly DbContext _context;
public UnitOfWork(DbContext context)
{
_context = context;
Contact = new ContractRepository(context);
}
public void Dispose()
{
_context.Dispose();
GC.SuppressFinalize(_context);
}
public IContactRepository Contact { get; private set; }
public int Complete()
{
return _context.SaveChanges();
}
}
，这是我的仓库：
public class Repository<Entity> : IRepository<Entity> where Entity : class
{
protected readonly DbContext _noteBookContext;
public Repository(DbContext noteBookContext)
{
_noteBookContext = noteBookContext;
}
public void Add(Entity entity)
{
_noteBookContext.Set<Entity>().Add(entity);
}
}
，这是我的库之一：
public class ContractRepository: Repository<Contact>,IContactRepository
{
public ContractRepository(DbContext noteBookContext) : base(noteBookContext)
{
}
public DbContext NotebookContext
{
get
{
return _noteBookContext;
}
}
}
，这是我的分贝上下文类别：
public class NoteBookContext:DbContext
{
public NoteBookContext(string connectionstring):base(connectionstring)
{
}
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Configurations.Add(new ContactConfig());
modelBuilder.Configurations.Add(new PhoneConfig());
modelBuilder.Configurations.Add(new PhoneTypeConfig());
modelBuilder.Configurations.Add(new GroupConfig());
base.OnModelCreating(modelBuilder);
}
public DbSet<Contact> Contacts { get; set; }
public DbSet<Phone> Phones { get; set; }
public DbSet<Group> Groups { get; set; }
public DbSet<PhoneType> PhoneTypes { get; set; }
}
现在我想用构造函数注册的UnitOfWork（像这样的构造：）
var uow = new UnitOfWork(new NotebookdbContext("connectionstring"));
注意NoteBookContext是我的实体框架模型。
我写的注册，但我得到了错误：
var builder = new ContainerBuilder();
builder.RegisterType<NoteBookContext>()
.As<DbContext>();
builder.RegisterType<UnitOfWork>()
.UsingConstructor(typeof(DbContext))
.As<IUnitOfWork>();
builder.RegisterGeneric(typeof(Repository<>))
.As(typeof(IRepository<>))
.InstancePerLifetimeScope();
Container container = builder.Build();
这是我的错误：
An unhandled exception of type 'Autofac.Core.DependencyResolutionException' occurred in Autofac.dll Additional information: None of the constructors found with 'Autofac.Core.Activators.Reflection.DefaultConstructorFinder' on type 'DataLayer.NoteBookContext' can be invoked with the available services and parameters:
Cannot resolve parameter 'System.String connectionstring' of constructor 'Void .ctor(System.String)'.
编辑2：
从西里尔·杜兰德的回答后帮我写下列注册配置：
var builder = new ContainerBuilder();
builder.RegisterType<ConnectionStringProvider>().As<IConnectionStringProvider>();
builder.RegisterType<NoteBookContext>().As<DbContext>().WithParameter((pi, c) => pi.Name == "connectionstring",
(pi, c) => c.Resolve<IConnectionStringProvider>().ConnectionString);
builder.RegisterType<UnitOfWork>().As<IUnitOfWork>().WithParameter(ResolvedParameter.ForNamed<DbContext>("connectionstring"));
builder.RegisterGeneric(typeof(Repository<>)).As(typeof(IRepository<>)).InstancePerLifetimeScope();
，并在我的代码：
using (var scope = DependencyInjection.Container.BeginLifetimeScope())
{
var ConnectionString = scope.Resolve<IConnectionStringProvider>();
ConnectionString.ConnectionString = "Context";
var uw = scope.Resolve<IUnitOfWork>();
var a =uw.Contact.GetAll();
}
，但我得到的错误再次：
An unhandled exception of type 'Autofac.Core.DependencyResolutionException' occurred in Autofac.dll
Additional information: An exception was thrown while invoking the constructor 'Void .ctor(System.String)' on type 'NoteBookContext'.
每个人都可以帮我吗？
您可以编辑您的文章，包括错误消息？ –
@CyrilDurand：我包含错误 –