// 添加自己的服務(wù)
// IRepository是一個(gè)接口，表示要請(qǐng)求的類型
// UserRepository表示IRepository接口的具體實(shí)現(xiàn)類型
services.AddTransient();

using System.Linq;
using DependencyInjectionDemo.Model;
using DependencyInjectionDemo.Repository;
using Microsoft.AspNetCore.Mvc;

namespace DependencyInjectionDemo.Controllers
{
    public class CharactersController : Controller
    {
        // 定義私有的只讀字段
        private readonly ICharacterRepository _characterRepository;

        /// 

        /// 通過(guò)構(gòu)造函數(shù)注入并且給私有字段賦值
        /// 
        /// 
        public CharactersController(ICharacterRepository characterRepository)
        {
            _characterRepository = characterRepository;
        }


        public IActionResult Index()
        {
            return View();
        }

        private void PopulateCharactersIfNoneExist()
        {
            // 如果不存在則添加
            if(!_characterRepository.ListAll().Any())
            {
                _characterRepository.Add(new Character("Tom"));
                _characterRepository.Add(new Character("Jack"));
                _characterRepository.Add(new Character("Kevin"));
            }
        }
    }
}

using DependencyInjectionDemo.Model;
using System.Collections.Generic;

namespace DependencyInjectionDemo.Repository
{
    public interface ICharacterRepository
    {
        IEnumerable ListAll();
        int Add(Character character);
    }
}

using DependencyInjectionDemo.Context;
using DependencyInjectionDemo.Model;
using System.Collections.Generic;
using System.Linq;

namespace DependencyInjectionDemo.Repository
{
    public class CharacterRepository : ICharacterRepository
    {
        // 定義私有字段
        private readonly AppDbContext _dbContext;

        /// 

        /// 通過(guò)構(gòu)造函數(shù)注入，并且給私有字段賦值
        /// 
        /// 
        public CharacterRepository(AppDbContext dbContext)
        {
            _dbContext = dbContext;
        }

        public int Add(Character character)
        {
            // 添加
            _dbContext.Characters.Add(character);
            // 保存
            return _dbContext.SaveChanges();
        }

        public IEnumerable ListAll()
        {
            return _dbContext.Characters.AsEnumerable();
        }
    }
}

public void ConfigureServices(IServiceCollection services)
{
    // 添加EntityFrameworkCore服務(wù)
    // 這里是注冊(cè)AppDbContext使用AddDbContext的形式
    services.AddDbContext(options => 
    {
        options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection"));
    });

    // 添加自己的服務(wù)
    // IRepository是一個(gè)接口，表示要請(qǐng)求的類型
    // UserRepository表示IRepository接口的具體實(shí)現(xiàn)類型
    services.AddTransient();

    // 注冊(cè)ICharacterRepository類型
    services.AddTransient();
    // 添加MVC服務(wù)
    services.AddControllersWithViews();
}

using System;

namespace DependencyInjectionDemo.Repository
{
    /// 

    /// 基接口
    /// 
    public interface IOperationRepository
    {
        Guid GetOperationId();
    }

    /// 

    /// 瞬時(shí)接口
    /// 
    public interface IOperationTransientRepository: IOperationRepository
    {

    }

    /// 

    /// 作用域接口
    /// 
    public interface IOperationScopeRepository : IOperationRepository
    {

    }

    /// 

    /// 單例接口
    /// 
    public interface IOperationSingletonRepository : IOperationRepository
    {

    }
}

using System;

namespace DependencyInjectionDemo.Repository
{
    public class OperationRepository : IOperationRepository
    {
        private readonly Guid _guid;

        public OperationRepository()
        {
            _guid = Guid.NewGuid();
        }

        public  Guid GetOperationId()
        {
            return _guid;
        }
    }

    public class OperationTransientRepository : OperationRepository, IOperationTransientRepository
    {

    }

    public class OperationScopeRepository : OperationRepository, IOperationScopeRepository
    {

    }

    public class OperationSingletonRepository : OperationRepository, IOperationSingletonRepository
    {

    }
}

public void ConfigureServices(IServiceCollection services)
{
    // 添加EntityFrameworkCore服務(wù)
    // 這里是注冊(cè)AppDbContext使用AddDbContext的形式
    services.AddDbContext(options => 
    {
        options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection"));
    });

    // 添加自己的服務(wù)
    // IRepository是一個(gè)接口，表示要請(qǐng)求的類型
    // UserRepository表示IRepository接口的具體實(shí)現(xiàn)類型
    services.AddTransient();

    // 注冊(cè)ICharacterRepository類型
    services.AddTransient();

    // 添加瞬時(shí)生命周期
    services.AddTransient();
    // 添加作用域生命周期
    services.AddScoped();
    // 添加單例生命周期
    services.AddSingleton();
    // 添加MVC服務(wù)
    services.AddControllersWithViews();
}

using DependencyInjectionDemo.Repository;
using Microsoft.AspNetCore.Mvc;

namespace DependencyInjectionDemo.Controllers
{
    public class OperationController : Controller
    {
        // 定義私有字段
        private readonly IOperationTransientRepository _transientRepository;
        private readonly IOperationScopeRepository _scopeRepository;
        private readonly IOperationSingletonRepository _singletonRepository;

        /// 

        /// 通過(guò)構(gòu)造函數(shù)實(shí)現(xiàn)注入
        /// 
        /// 
        /// 
        /// 
        public OperationController(IOperationTransientRepository transientRepository,
            IOperationScopeRepository scopeRepository,
            IOperationSingletonRepository singletonRepository)
        {
            _transientRepository = transientRepository;
            _scopeRepository = scopeRepository;
            _singletonRepository = singletonRepository;
        }


        public IActionResult Index()
        {
            // ViewBag賦值
            ViewBag.TransientGuid = _transientRepository.GetOperationId();
            ViewBag.ScopedGuid = _scopeRepository.GetOperationId();
            ViewBag.SingletonGuid = _singletonRepository.GetOperationId();
            return View();
        }
    }
}

    

        
GuidItem Shows

        
TransientGuid: @ViewBag.TransientGuid

        
ScopedGuid: @ViewBag.ScopedGuid

        
SingletonGuid: @ViewBag.SingletonGuid
    

@*引入命名空間*@
@using DependencyInjectionDemo.Repository

@*通過(guò)該inject引入*@
@inject IOperationTransientRepository OperationTransientRepository
@inject IOperationScopeRepository OperationScopeRepository
@inject IOperationSingletonRepository OperationSingletonRepository


    

        
GuidItem Shows
        
TransientGuid: @OperationTransientRepository.GetOperationId()
        
ScopedGuid: @OperationScopeRepository.GetOperationId()
        
SingletonGuid: @OperationSingletonRepository.GetOperationId()
    

    

        @Html.Partial("GuidPartial")
        
**************************
        
GuidItem Shows
        
TransientGuid: @ViewBag.TransientGuid
        
ScopedGuid: @ViewBag.ScopedGuid
        
SingletonGuid: @ViewBag.SingletonGuid