在 ActionFilterAttribute 中查找过滤器

Question

我创建了一个自定义的 ActionFilterAttribute，我这样称呼它：

 [ScopeActionFilter(acceptedScopes = new string[] { "Files.Upload" })]
  public IActionResult Upload(IFormFile[] files)
   {
   }

现在，如何在 OnActionExecuting 方法中找到 acceptedScopes 的值？我如何检查 acceptedScopes 是否已传递给 ActionFilter ？

 public class ScopeActionFilter : ActionFilterAttribute
    {
        public string[] acceptedScopes { get; set; }

        public override void OnActionExecuting(ActionExecutingContext actionContext)
        { 
       
                ScopesRequiredByWebApiExtension.VerifyUserHasAnyAcceptedScope(actionContext.HttpContext, actionContext.ActionArguments["acceptedScopes"] as string[]);

        }    
    }

Answer 1

string[] ActionArguments = ((ScopeActionFilter)actionContext.Filters.Where(t => t is ScopeActionFilter).First()).acceptedScopes;

会起作用

Answer 2

how do I find the value of acceptedScopes in the OnActionExecuting method ?

在您的代码中，我们可以发现您在将 ScopeActionFilter 应用于 action 方法时设置了 acceptedScopes 属性的值，以获取 [=11= 的值] 在OnActionExecuting方法中，可以试试：

public class ScopeActionFilter : ActionFilterAttribute
{
    public string[] acceptedScopes { get; set; }

    public override void OnActionExecuting(ActionExecutingContext actionContext)
    {
        var args = acceptedScopes;
   
        ScopesRequiredByWebApiExtension.VerifyUserHasAnyAcceptedScope(actionContext.HttpContext, args);

    }
}

测试结果

在 ActionFilterAttribute 中查找过滤器

Finding a filter in ActionFilterAttribute

c#

asp.net-core

actionfilterattribute