CODEWITHSUNDEEP
c#.net-coreautofac
beiduoan
beiduoan

Reputation: 63

Inherited class property injection with autofac

I hope to register with autofac property injection,But can't work ClassA property = null.Not injected successfully,how to change my code

public interface IRepository
{
}

public class Repository : IRepository
{
    public Repository()
    {

    }

}

this my base class

public class RepositoryBase : Repository
{
    public ClassA ClassA { get; set; }
    public RepositoryBase()
    {
            
    }

    public void Print()
    {
        ClassA.Exec();
    }
}

//Does property injection need to inject ClassA?

public class ClassA
    {
        public ClassA()
        {

        }

        public void Exec()
        {
            Console.WriteLine("Test");
        }
    }

call method

public interface ITestRepository
{
    void ExecPrint();
}

public class TestRepository : RepositoryBase, ITestRepository
{
    public TestRepository()
    {

    }

    public void ExecPrint()
    {
        Print();
    }
}

this my autofac register code

public class ContainerModule : Module
        {
            protected override void Load(ContainerBuilder builder)
            {
                var assembly = Assembly.GetExecutingAssembly();
                builder.RegisterAssemblyTypes(assembly)
                    .Where(t => t.Name.EndsWith("Repository"))
                    .AsImplementedInterfaces()
                    .InstancePerLifetimeScope()
                    ;
    
                builder.RegisterType<ClassA>().InstancePerLifetimeScope();
        builder.RegisterType<RepositoryBase>().InstancePerLifetimeScope().PropertiesAutowired(PropertyWiringOptions.AllowCircularDependencies);
            }
        }

call Screenshots

RepositoryBase ClassA property = nulll

Upvotes: 1

Views: 384

Answers (1)

mrvux
mrvux

Reputation: 8973

You are specifying PropertiesAutowired for the base class, but not for the main types.

So changing your registration to :

var assembly = Assembly.GetExecutingAssembly();
        builder.RegisterAssemblyTypes(assembly)
            .Where(t => t.Name.EndsWith("Repository"))
            .AsImplementedInterfaces()
            .InstancePerLifetimeScope()
            .PropertiesAutowired()
            ;

builder.RegisterType<ClassA>().InstancePerLifetimeScope();

Will make sure that the final implementations do receive the property.

Also since I guess you would resolve by :

var container = builder.Build();
var test = container.Resolve<ITestRepository>();
test.ExecPrint();

You do not need to register RepositoryBase, autofac does not require the full class hierarchy to be registered, only the final type you use.

Upvotes: 2

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