Asp .Net MVC中常用过滤属性类

        /// <summary>
    /// 
    /// </summary>
    public class AjaxOnlyAttribute : ActionFilterAttribute
    {
        /// <summary>
        /// Called by the ASP.NET MVC framework before the action method executes.
        /// </summary>
        /// <param name="filterContext">The filter context.</param>
        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            if (!filterContext.HttpContext.Request.IsAjaxRequest())
            {
                filterContext.Result = new ContentResult() { Content = "只支持Ajax方法调用。", ContentEncoding = Encoding.UTF8, ContentType = "text/html" };
                //new HttpNotFoundResult();
            }
            base.OnActionExecuting(filterContext);
        }

        /// <summary>
    /// 自定义模板页面
    /// </summary>
    public class LayoutAttribute : ActionFilterAttribute
    {
        private readonly string _masterName;
        public LayoutAttribute(string masterName)
        {
            _masterName = masterName;
        }
        /// <summary>
        /// 页面渲染结束后执行
        /// </summary>
        /// <param name="filterContext"></param>
        public override void OnActionExecuted(ActionExecutedContext filterContext)
        {
            base.OnActionExecuted(filterContext);
            var result = filterContext.Result as ViewResult;
            if (result != null)
            {
                result.MasterName = _masterName;
            }
        }
    }

        /// <summary>
    /// 页面标题
    /// </summary>
    public class PageTitleAttribute : ActionFilterAttribute
    {
        private readonly string _pageTitle;
        public PageTitleAttribute(string pageTitle)
        {
            _pageTitle = pageTitle;
        }
        /// <summary>
        /// 页面渲染结束后执行
        /// </summary>
        /// <param name="filterContext"></param>
        public override void OnActionExecuted(ActionExecutedContext filterContext)
        {
            base.OnActionExecuted(filterContext);
            var result = filterContext.Result as ViewResult;
            if (result != null)
            {
                result.ViewBag.Title = _pageTitle;
            }
        }
    }

    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = false)]
    public class AuthorizeFilterAttribute : ActionFilterAttribute
    {
        // OnActionExecuted 在执行操作方法后由 ASP.NET MVC 框架调用。
        // OnActionExecuting 在执行操作方法之前由 ASP.NET MVC 框架调用。
        // OnResultExecuted 在执行操作结果后由 ASP.NET MVC 框架调用。
        // OnResultExecuting 在执行操作结果之前由 ASP.NET MVC 框架调用。
        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            //DoSomething();
        }
    }