没有[ServiceFilter]或[TypeFilter]的过滤器中的Asp.net核心依赖注入

Question

I need to inject some services with dependency injection to action filters. I'm familiar with the [ServiceFilter] and [TypeFilter] approach, but it's kind of ugly, messy, and unclear.

Is there a way I can set a filter in the normal way? without wrapping the filter I'm using with [ServiceFilter] or [TypeFilter] ?

For example what I want:

[SomeFilterWithDI]
[AnotherFilterWithDI("some value")]
public IActionResult Index()
{
    return View("Index");
}

Instead of:

[ServiceFilter(typeof(SomeFilterWithDI))]
[TypeFilter(typeof(AnotherFilterWithDI), Arguments = new string[] { "some value" })]
public IActionResult Index()
{
    return View("Index");
}

It looks way different, this approach doesn't seem right to me.

Answer 1

For [SomeFilterWithDI] , you could refer the comment from @Kirk larkin.

For [AnotherFilterWithDI("some value")] , you could try passing Arguments from TypeFilterAttribute .

• ParameterTypeFilter define the accept parameters.

   public class ParameterTypeFilter: TypeFilterAttribute { public ParameterTypeFilter(string para1, string para2):base(typeof(ParameterActionFilter)) { Arguments = new object[] { para1, para2 }; } } 

• ParameterActionFilter accept the passed parameters.

    public class ParameterActionFilter : IActionFilter { private readonly ILogger _logger; private readonly string _para1; private readonly string _para2; public ParameterActionFilter(ILoggerFactory loggerFactory, string para1, string para2) { _logger = loggerFactory.CreateLogger<ParameterTypeFilter>(); _para1 = para1; _para2 = para2; } public void OnActionExecuting(ActionExecutingContext context) { _logger.LogInformation($"Parameter One is {_para1}"); // perform some business logic work } public void OnActionExecuted(ActionExecutedContext context) { // perform some business logic work _logger.LogInformation($"Parameter Two is {_para2}"); } } 

  As the description from Arguments , ILoggerFactory loggerFactory is resolved by dependency injection container . para1 and para2 is resolved by ParameterTypeFilter .

    // // Summary: // Gets or sets the non-service arguments to pass to the Microsoft.AspNetCore.Mvc.TypeFilterAttribute.ImplementationType // constructor. // // Remarks: // Service arguments are found in the dependency injection container ie this filter // supports constructor injection in addition to passing the given Microsoft.AspNetCore.Mvc.TypeFilterAttribute.Arguments. public object[] Arguments { get; set; } 

• Useage

   [ParameterTypeFilter("T1","T2")] public ActionResult Parameter() { return Ok("Test"); }