使用Asp注入存储库时,对象为Null。净核心2

我无法使我的Func成功通过。我在启动时注入webapi。cs公司

services.AddDbContext<MyDataContext>(
    options => options.UseSqlServer(DbGlobals.DevDatabase,
    b => b.MigrationsAssembly("Services.Data.EF")));

services.AddTransient<Func<IMyDataContext>, Func<MyDataContext>>();
services.AddTransient(provider => new Func<IMyDataContext>(() => provider.GetService<IMyDataContext>()));

然后在我的控制器中,我有以下内容:;

private ClientService _service;

public ClientController(Func<IMyDataContext> context)
{
    _service = new ClientService(context);
}

我服务的方法是:;

private readonly Func<IMyDataContext> _contextFactory;

public ClientService(Func<IMyDataContext> contextFactory)
{
    _contextFactory = contextFactory;
}

public void AddClient(Client model, string userName)
{
    Func<Client> func = delegate
    {
        using (var context = _contextFactory())
        {
             ....
        }
    };

    return this.Execute(func);
}

现在,通过调试,如果我检查控制器注入,我可以看到Func被传入,并且处于服务级别2。但是,当在context=\u contextFactory()上的using语句中使用它时,它会变为null吗?

你知道我做错了什么吗?