autofac 切換接口小例子

using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using Autofac;
namespace ConsoleApp2
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("如今演示切換數據庫的狀況");
            //使用sql server
            var t1 = SwitchRespority("sql");
            IPerson tt = t1.Resolve<IPerson>();
            tt.Show();
            var t2 = SwitchRespority("oracle");
            IPerson tt1 = t2.Resolve<IPerson>();
            tt1.Show();
            Console.Read();
        }
        /// <summary>
        /// 切換數據庫
        /// </summary>
        private static IContainer SwitchRespority(string name)
        {
            var builder = new ContainerBuilder();
            Type t = null;
            switch (name)
            {
                case "sql": t = typeof(ISql); break;
                case "oracle": t = typeof(IOracle); break;
            }
            var types = AppDomain.CurrentDomain.GetAssemblies()
                     .SelectMany(a => a.GetTypes().Where(t1 => t1.GetInterfaces().Contains(t)))
                     .Where(d => !d.IsGenericType)
                     .ToArray();
            builder.RegisterTypes(types).AsImplementedInterfaces();
            return builder.Build();
        }
    }

    public abstract class BaseEntiry
    {
        public abstract int Id { get; set; }
    }
    public interface ISql
    {

    }
    public interface IOracle
    {

    }
    /// <summary>
    /// 通用存儲接口
    /// </summary>
    /// <typeparam name="T"></typeparam>
    public interface IRepository<T> where T : BaseEntiry
    {
        T GetById(int id);
        IEnumerable<T> List();
        IEnumerable<T> List(Expression<Func<T, bool>> predicate);
        void Add(T entity);
        void Delete(T entity);
        void Edit(T entity);
    }
    /// <summary>
    /// 通用存儲庫實現
    /// </summary>
    /// <typeparam name="T"></typeparam>
    public class Repository<T> : ISql, IRepository<T> where T : BaseEntiry
    {
        public void Add(T entity)
        {
            throw new NotImplementedException();
        }

        public void Delete(T entity)
        {

        }

        public void Edit(T entity)
        {
            throw new NotImplementedException();
        }

        public T GetById(int id)
        {
            throw new NotImplementedException();
        }

        public IEnumerable<T> List()
        {
            throw new NotImplementedException();
        }

        public IEnumerable<T> List(Expression<Func<T, bool>> predicate)
        {
            throw new NotImplementedException();
        }
    }

    public class OracleRepository<T> : IOracle, IRepository<T> where T : BaseEntiry
    {
        public void Add(T entity)
        {
            throw new NotImplementedException();
        }

        public void Delete(T entity)
        {

        }

        public void Edit(T entity)
        {
            throw new NotImplementedException();
        }

        public T GetById(int id)
        {
            throw new NotImplementedException();
        }

        public IEnumerable<T> List()
        {
            throw new NotImplementedException();
        }

        public IEnumerable<T> List(Expression<Func<T, bool>> predicate)
        {
            throw new NotImplementedException();
        }
    }
    public class Person : BaseEntiry
    {
        public override int Id { get => throw new NotImplementedException(); set => throw new NotImplementedException(); }
    }
    public interface IPerson : IRepository<Person>
    {
        void Show();
    }
    public class PersonRepository : Repository<Person>, IPerson
    {
        public void Show()
        {
            Console.WriteLine("sql server 123123");
        }
    }
    public class OraclePersonRepository : OracleRepository<Person>, IPerson
    {
        public void Show()
        {
            Console.WriteLine("oracle 123123");
        }
    }
}