Asp.Net Mvc - 在OnResultExecut* 攔截Action返回的HTML

在Asp.Net MVC項目中通過重寫ActionFilterAttribute中的方法，我們就可以在輕松的在Action方法執行前后做一些特殊的操作如：[身份認證、日志記錄、內容截取等]。

但是我們要想在OnResultExecuting\OnResultExecuted中獲取Actioin返回的HTML該怎么做呢？

廢話不多說先看代碼如下：

運行結果如下：

微軟官方的ActionFilterAttribute定義如下：

   using System;
   namespace System.Web.Mvc
   {
	/// <summary>Represents the base class for filter attributes.</summary>
	[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, Inherited = true, AllowMultiple = false)]
	public abstract class ActionFilterAttribute : FilterAttribute, IActionFilter, IResultFilter
	{
		/// <summary>Called by the ASP.NET MVC framework before the action method executes.</summary>
		/// <param name="filterContext">The filter context.</param>
		public virtual void OnActionExecuting(ActionExecutingContext filterContext)
		{
		}
		/// <summary>Called by the ASP.NET MVC framework after the action method executes.</summary>
		/// <param name="filterContext">The filter context.</param>
		public virtual void OnActionExecuted(ActionExecutedContext filterContext)
		{
		}
		/// <summary>Called by the ASP.NET MVC framework before the action result executes.</summary>
		/// <param name="filterContext">The filter context.</param>
		public virtual void OnResultExecuting(ResultExecutingContext filterContext)
		{
		}
		/// <summary>Called by the ASP.NET MVC framework after the action result executes.</summary>
		/// <param name="filterContext">The filter context.</param>
		public virtual void OnResultExecuted(ResultExecutedContext filterContext)
		{
		}
	}
   }