Question

我希望创建一个Action Filter，用于检查用户是否创建了一些内容。如果他们不这样做，那么我想阻止执行该操作并返回错误。

这是我到目前为止所做的：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Http.Controllers;
using System.Web.Http.Filters;
using uQuiz.Domain.Abstract;
using uQuiz.WebUI.Helpers;
using Microsoft.AspNet.Identity;
using System.Net.Http;
using System.Net;

namespace uQuiz.WebUI.Controllers.Filters
{
    /// <summary>
    /// Determines whether the current logged in user has permission to edit the quiz requested
    /// </summary>
    public class CanEditQuiz : ActionFilterAttribute
    {
        IQuizEntities Context;

        public CanEditQuiz()
        {

        }

        public CanEditQuiz(IQuizEntities context)
        {
            this.Context = context;
        }

        public override void OnActionExecuting(HttpActionContext actionContext)
        {
            // Get the URL ID from the request
            string urlId = actionContext.ModelState["urlId"].Value.ToString();
            int userId = HttpContext.Current.User.Identity.GetUserId<int>();

            if (!QuizHelper.IsQuizOwner(this.Context, urlId, userId))
            {
                // Prevent action executing
            }

            base.OnActionExecuting(actionContext);
        }
    }
}

我看到other questions提到将Result设置为null，但是当我覆盖OnActionExecuting方法时，它已HttpActionContext而不是ActionExecutingContext出于某种原因？

如何阻止操作执行？

Answer 1

您需要使用

System.Web.Mvc.ActionFilterAttribute

不

System.Web.Http.Filters.ActionFilterAttribute

防止在Action Filter中执行

1 个答案: