如何访问 ActionExecutingContext 中的 Request.Properties

Question

如何访问Request.Properties的ActionExecutingContext？

public class UserFilter : ActionFilterAttribute
{
    public void OnActionExecuting(ActionExecutingContext actionContext)
    {
        // Properties is not part of the Request here, so I can't access it
        // Here Request is of type System.Web.HttpRequestBase
        actionContext.HttpContext.Request.Properties.Add("UserData", new UserData());
    }
}

我可以做到ApiController：

public class HomeController : ApiController
{
    public HomeController()
    {
        // Here I can do it (here Request is of type
        // System.Net.Http.HttpRequestMessage
        this.Request.Properties.Add("UserData", new UserData());
    }
}

Answer 1

因为ApiController您需要使用另一个ActionFilterAttribute（位于System.Web.Http.Controllers命名空间中）：

    using System.Web.Http.Controllers;
    using System.Web.Http.Filters;

    public class UserFilter : ActionFilterAttribute
    {
        public override void OnActionExecuting(HttpActionContext actionContext)
        {
                    // Properties is part of the Request here, you can access it
                    // actionContext.Request.Properties
        }
    }