.NET CORE 通过依赖注入获取所有的的实现

  先定义一个接口

 1    /// <summary>
 2     /// 支付接口
 3     /// </summary>
 4     public interface IPaymentService
 5     {
 6 
 7         /// <summary>
 8         /// 支付类型
 9         /// </summary>
10         public string PayType { get;  } //这个字段是用来筛选的，可以没有，属于业务字段，用于演示
11 
12   }

 1 然后实现这个接口
 2 
 3     /// <summary>
 4     /// 微信支付实现
 5     /// </summary>
 6     public class WeChatPaymentService : IPaymentService
 7     { 12         private readonly IHttpContextAccessor _httpContextAccessor;
13 
14         public WeChatPaymentService(
15             IHttpContextAccessor httpContextAccessor )
20         {
21             _httpContextAccessor = httpContextAccessor; 26         }
27 
           //赋值筛选字段
28         public string PayType => "wechat";
29 }

 1 调用的时候使用 IEnumerable<>
 2 
 3 
 4   /// <summary>
 5     ///  测试获取接口所有注入实现
 6     /// </summary>
 7     [Route("api/[controller]")]
 8     [ApiController]
 9     public class PayTestController : ControllerBase
10     {
11         private IEnumerable<IPaymentService> _paymentService;
12 
13         public PayTestController(IEnumerable<IPaymentService> paymentService)
14         {
15             _paymentService = paymentService;
16         }  
17 
18         [HttpGet]
19         [Route("testPay")]
20         public async Task<IActionResult> testPay(string groupOrderNumber)
21         {
              // 可以通过 FirstOrDefault 来进行筛选  
              // _paymentService 是所有实现的集合
22             var paymentService = _paymentService.FirstOrDefault(m => m.PayType == "wechat");  24             return Ok(); 
26         } 
28     }