Autofac WCF注入反射

Question

我的应用程序上有 N 个验证器，但客户端没有使用所有验证器，我通过过程获得了当前客户端需要实例化的所有类。

我的业务层：

public class MyClass
{
    public void MyMethod(int idClient)
    {
        //This array is returned by a procedure passing idClient
        string[] validatorsName = { "ValidatorName", "ValidatorName2" };

        foreach (string name in validatorsName)
        {

            IValidator validator = (IValidator)Activator.CreateInstance(Type.GetType(name));
            //Error. I need pass the INameDB;

            validator.Process();
        }
    }
}

我的界面：

public interface IValidator
{
    void Process();
}

验证者：

public class ValidatorName : IValidator
{
    INameDB nameDB;

    public ValidatorName(INameDB nameDB)
    {
        this.nameDB = nameDB;
    }

    public void Process()
    {
        nameDB.AnyThing(pedidoId);
    }
}

public class ValidatorName2 : IValidator
{
    INameDB2 nameDB;

    public ValidatorName(INameDB2 nameDB)
    {
        this.nameDB = nameDB;
    }

    public void Process()
    {
        nameDB.AnyThing2(pedidoId);
    }
}

public class ValidatorName3 : IValidator
{
    INameDB2 nameDB;

    public ValidatorName(INameDB2 nameDB)
    {
        this.nameDB = nameDB;
    }

    public void Process()
    {
        nameDB.AnyThing2(pedidoId);
    }
}

在 Global 上，我可以注册所有验证器并使用 IList<IValidator>，因此我将从列表中删除我不需要的验证器。

 string[] validatorsName = { "ValidatorName", "ValidatorName2" };
 validators = validators .Where(p => validatorsName .Contains(p.GetType().Name)).ToList();

但我有很多课程，它会注册这个不需要。

我的全球：

public class Global : System.Web.HttpApplication
{

    protected void Application_Start(object sender, EventArgs e)
    {
        ContainerBuilder builder = new ContainerBuilder();
        builder.RegisterType<NameDB>().As<INameDB>();
        builder.RegisterType<NameDB2>().As<INameDB2>();

        //builder.RegisterType<ValidatorName1>().As<IValidator>();
        //builder.RegisterType<ValidatorName2>().As<IValidator>();
        //builder.RegisterType<ValidatorName3>().As<IValidator>();

        AutofacHostFactory.Container = builder.Build();
        //AutofacHostFactory.Container.Resolve<IList<IValidator>>();
    }
}

我的问题是如何检测接口INameDB 或INameDB2，在Autofac 上获取实例并在Activator.CreateInstance 上使用？

谢谢。

Answer 1

几天后，我可以编写解决方案：

我的主类，我创建了一个注入验证器列表的方法：

public class MyClass
{
    private IList<IValidator> listValidators;

    public void MyMethod(int idClient)
    {
        ExecuteValidations(idClient);
    }

    private void ValidatorInjection(int idClient)
    {
        listValidators = new List<IValidator>();
        //This array is returned by a procedure passing idClient
        string[] validatorsName = { "ValidatorName", "ValidatorName2" };
        foreach (string name in validatorsName)
        {
            IValidator validador = (IValidator)Activator.CreateInstance(Type.GetType(name));
            listValidators.Add(validador);
        }
    }

    private void ExecuteValidations(int idClient)
    {
        ValidatorInjection(idClient);
        RunValidatorsList();
    }

    private void RunValidatorsList()
    {
        foreach (var validator in listValidators)
        {
            validator.Process();
        }
    }
}

我的验证器，我需要使用 INameDB2 db = AutofacHostFactory.Container.Resolve<INameDB2>(); 获取容器上的接口数据库实例：

public class ValidatorName : IValidator
{
    public void Process()
    {
        INameDB db = AutofacHostFactory.Container.Resolve<INameDB>();
        db.AnyThing(pedidoId);
    }
}

public class ValidatorName2 : IValidator
{
    public void Process()
    {
        INameDB2 db = AutofacHostFactory.Container.Resolve<INameDB2>();
        db.AnyThing2(pedidoId);
    }
}

public class ValidatorName3 : IValidator
{
    public void Process()
    {
        INameDB2 db = AutofacHostFactory.Container.Resolve<INameDB2>();
        db.AnyThing2(pedidoId);
    }
}

在 Global 上，我做了一种不需要添加行来注册 IValidator 实现的新类的方法：

public class Global : System.Web.HttpApplication
{
    protected void Application_Start(object sender, EventArgs e)
    {
        ContainerBuilder builder = new ContainerBuilder();
        builder.RegisterType<NameDB>().As<INameDB>();
        builder.RegisterType<NameDB2>().As<INameDB2>();

        string assembly = "MY_ASSEMBLY";
        builder.RegisterAssemblyTypes(Assembly.Load(assembly)).Where(t => t.IsAssignableTo<IValidator>()).AsImplementedInterfaces();

        AutofacHostFactory.Container = builder.Build();
    }
}