.net core (.net 6) IOC容器注入--内置容器

注：内置容器仅支持构造函数方式注入（经过实验[FromServices]注入也支持）

参考：面试疑问：.NET Core依赖注入有三种方式是真的吗？

1、添加类库项目 Demo02.Interface、Demo02.Service

 

2、创建ITestServiceA接口

namespace Demo02.Interface
{
    public interface ITestServiceA
    {
        public string ShowA(string info);

    }
}

3、创建TestServiceA.cs实现ITestServiceA接口

using Demo02.Interface;

namespace Demo02.Service
{
    public class TestServiceA : ITestServiceA
    {
        public TestServiceA()
        {
            Console.WriteLine($"{GetType().Name} 被构造~");
        }
        public string ShowA(string info)
        {
            return $"this is from {GetType().Name} ShowA:{info}";
        }
    }
}

4、Demo02.Interface、Demo02.Service生成项目，在Demo02中添加依赖项。

 

 

 5、Program.cs中注册抽象与具体的关系

 

 

#region 注册抽象与具体的关系
{
    builder.Services.AddTransient<ITestServiceA, TestServiceA>();
}
#endregion

6、创建IOCContainerController，注入ITestServiceA，测试使用。

using Demo02.Interface;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;

namespace Demo02.Controllers
{
    /// <summary>
    /// IOC容器使用
    /// </summary>
    [ApiVersion("1.0")]
    [Route("[controller]/V{version:apiVersion}")]
    [ApiController]
    public class IOCContainerController : ControllerBase
    {
        private readonly ILogger<IOCContainerController> _logger;
        private readonly ITestServiceA _ITestServiceA;

        /// <summary>
        /// 构造函数
        /// </summary>
        /// <param name="logger"></param>
        /// <param name="iTestServiceA">注入ITestServiceA</param>
        public IOCContainerController(ILogger<IOCContainerController> logger,ITestServiceA iTestServiceA)
        {
            _logger = logger;
            _ITestServiceA = iTestServiceA;
        }

        /// <summary>
        /// GET
        /// </summary>
        /// <returns></returns>
        [HttpGet()]
        public string GetString()
        {
            return _ITestServiceA.ShowA("IOC容器使用成功");
        }

    }
}

7、接口测试