類型	s說明
EmptyResult	不進行任何操作
ContentResult	將指定內容作為文本輸出
JsonResult	輸出JSON字符串
JavaScriptResult	輸出JavaScript
RedirecResult、RedirectToRouteResult	重定向到給定的URL中
FileResult(抽象類) FilePathResult、FileContentResult、FileStreamResult	文件輸出
ViewResultBase(抽象類) ViewResult、PartialViewResult	調用視圖輸出

Controller控制器代碼如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.IO;

namespace MvcActionReturnType.Controllers
{
    public class HomeController : Controller
    {
        /// <summary>
        /// 1、返回一個ViewResult對象
        /// </summary>
        /// <returns></returns>
        public ActionResult Index()
        {
            return View();
        }

        /// <summary>
        /// 2、返回一個json格式的數(shù)據
        /// </summary>
        /// <returns></returns>
        public ActionResult Json()
        {
            var book = new { BookId = 1, BookName = "MVC框架" };
            return Json(book, JsonRequestBehavior.AllowGet);
        }

        /// <summary>
        /// 3、返回JavaScript
        /// </summary>
        /// <returns></returns>
        public ActionResult JavaScript()
        {
            string js = "<script>alert('Welcome to ASP.NET MVC')</script>";
            return JavaScript(js);
        }

        /// <summary>
        /// 4、返回FilePath
        /// </summary>
        /// <returns></returns>
        public ActionResult FilePath()
        {
            //return File("~/Content/校長 - 帶你去旅行.mp3", "audio/mp3");
            return new FilePathResult("~/Content/校長 - 帶你去旅行.mp3", "audio/mp3");
        }

        /// <summary>
        /// 5、返回FileContent
        /// </summary>
        /// <returns></returns>
        public ActionResult FileContent()
        {
            string content = "Welcome To ASP.NET MVC";
            byte[] contents = System.Text.Encoding.UTF8.GetBytes(content);
            return File(contents, "text/plain");
        }

        /// <summary>
        /// 6、返回FileStream
        /// </summary>
        /// <returns></returns>
        public ActionResult FileStream()
        {
            string content = "Welcome To ASP.NET MVC";
            byte[] contents = System.Text.Encoding.UTF8.GetBytes(content);
            FileStream fs = new FileStream(Server.MapPath("~/Content/2 開發(fā)環(huán)境下載安裝說明.doc"), FileMode.Open);
            return File(fs, "application/msword");
        }

        /// <summary>
        /// 7、返回 ContentResult
        /// </summary>
        /// <returns></returns>
        public ActionResult ContentResult()
        {
            string content = "<h1>Welcome To ASP.NET MVC</h1>";
            return Content(content);
        }



        public ActionResult About()
        {
            ViewBag.Message = "Your application description page.";

            return View();
        }

        public ActionResult Contact()
        {
            ViewBag.Message = "Your contact page.";

            return View();
        }
    }
}

視圖代碼如下：

@{
    ViewBag.Title = "Home Page";
}


<div>
    1.輸出json
    <p>
        @Html.ActionLink("生成Json", "Json");
    </p>

    2.輸出js
    <script src=@Url.RouteUrl(new { action="JavaScript"}) type="text/javascript">

    </script>
    <p>
        @(Url.RouteUrl(new { controller = "home", action = "JavaScript" }));
        @Html.ActionLink("生成JavaScript", "JavaScript");
    </p>

    3.播放音樂
    <p>
        @Html.ActionLink("播放MP3", "FilePath");
    </p>
    4.查看文本文件
    <p>
        @Html.ActionLink("查看文件內容", "FileContent");
    </p>
    5.鏈接文件流
    <p>
        @Html.ActionLink("訪問Doc", "FileStream");
    </p>
    6.輸出文本
    <p>
        @Html.ActionLink("輸出文本", "ContentResult");
    </p>
</div>

請看下面的兩段代碼：

public int Sum(int num1, int num2)
{
       int sum = num1 + num2;
       return sum;
}

public ActionResult Sum2(int num1, int num2)
{
       int sum = num1 + num2;
       return Content(sum.ToString());
}

有些時候，我們希望把Action定義成一種更自然的形式，比如我們希望Action Sum2做一個求和的計算，傳入的參數(shù)是整數(shù)，計算的結果也是整數(shù)，那么可不可以返回一個整數(shù)的結果呢？

如上面的兩個方法所示，兩個方法的效果是等價的，也就是會把整形的數(shù)據轉換成字符串類型，然后封裝成ContentResult類型，這個過程是MVC框架自動幫助我們完成的。