Asp.Net中的Fillter

Asp.net中一共有五种Fillter

• AuthorizationFilter 授权过滤器
• IResourceFilter 资源管理过滤器
• IActionFilter 行为过滤器
• IExceptionFilter 异常过滤器
• IResultFilter 结果过滤器

      public class CtmActionFilterAttribute : Attribute,IActionFilter
      {
          public void OnActionExecuted(ActionExecutedContext context)
          {
              Console.WriteLine("OnActionExecuted");
          }
  
          public void OnActionExecuting(ActionExecutingContext context)
          {
              Console.WriteLine("OnActionExecuting");
          }
      }

注册方式

• 方法注册
• 类注册
• 全局注册

   

方法注册

    [Route("api/[controller]")]
    [ApiController]

    public class DoHomeworkController : ControllerBase
    {
        [HttpGet]
        public string DoHomeWork()
        {
            return GetInCar();
        }

        private string GetInCar()
        {
            return "上车";
        }

        [HttpGet("2")]
        [CtmFillters.CtmActionFilter]
        public string DoHomeWork1()
        {
            return GetInCar();
        }
    }

类注册

[Route("api/[controller]")]
    [ApiController]
    [CtmFillters.CtmActionFilter]
    public class DoHomeworkController : ControllerBase
    {
        [HttpGet]
        public string DoHomeWork()
        {
            return GetInCar();
        }

        private string GetInCar()
        {
            return "上车";
        }

        [HttpGet("2")]
        public string DoHomeWork1()
        {
            return GetInCar();
        }
    }

全局注册先于类注册先于方法注册执行

同理其他Filter的注册方式

另外Filter中的依赖注入，可使用[TypeFilter(Typeof(CtmActionFilterAttribute))]