关于Action返回结果类型的事儿（下）

原文:关于Action返回结果类型的事儿（下）

using System;

 using System.Collections.Generic;

 using System.Linq;

 using System.Web;

 using System.Web.Mvc;

 using System.Web.Mvc.Ajax;

   

 using System.IO;

   

 namespace MVC.Controllers

 {

     /// <summary>

     /// Controller 类必须以字符串 "Controller" 做类名称的结尾，字符串 Controller 之前的字符串为 Controller 的名称，类中的方法名为 Action 的名称

     /// </summary>

     public class ControllerDemoController : Controller

     {

         // [NonAction] - 当前方法仅为普通方法，不解析为 Action

         // [AcceptVerbs(HttpVerbs.Post)] - 声明 Action 所对应的 http 方法

   

         /// <summary>

         /// Action 可以没有返回值

         /// </summary>

         public void Void()

         {

             Response.Write(string.Format("<span style='color: red'>{0}</span>", "void"));

         }

   

         /// <summary>

         /// 如果 Action 要有返回值的话，其类型必须是 ActionResult

         /// EmptyResult - 空结果

         /// </summary>

         public ActionResult EmptyResult()

         {

             Response.Write(string.Format("<span style='color: red'>{0}</span>", "EmptyResult"));

             return new EmptyResult();

         }

   

         /// <summary>

         /// Controller.Redirect() - 转向一个指定的 url 地址

         /// 返回类型为 RedirectResult

         /// </summary>

         public ActionResult RedirectResult()

         {

             return base.Redirect("~/ControllerDemo/ContentResult");

         }

   

         /// <summary>

         /// Controller.RedirectToAction() - 转向到指定的 Action

         /// 返回类型为 RedirectToRouteResult

         /// </summary>

         public ActionResult RedirectToRouteResult()

         {

             return base.RedirectToAction("ContentResult");

         }

   

         /// <summary>

         /// Controller.Json() - 将指定的对象以 JSON 格式输出出来

         /// 返回类型为 JsonResult

         /// </summary>

         public ActionResult JsonResult(string name)

         {

             System.Threading.Thread.Sleep(1000);

  

             var jsonObj = new { Name = name, Age = new Random().Next(20, 31) };

             return base.Json(jsonObj);

         }

   

         /// <summary>

         /// Controller.JavaScript() - 输出一段指定的 JavaScript 脚本

         /// 返回类型为 JavaScriptResult

         /// </summary>

         public ActionResult JavaScriptResult()

         {

             return base.JavaScript("alert('JavaScriptResult')");

         }

   

         /// <summary>

         /// Controller.Content() - 输出一段指定的内容

         /// 返回类型为 ContentResult

         /// </summary>

         public ActionResult ContentResult()

         {

             string contentString = string.Format("<span style='color: red'>{0}</span>", "ContentResult");

             return base.Content(contentString);

         }

   

         /// <summary>

         /// Controller.File() - 输出一个文件（字节数组）

         /// 返回类型为 FileContentResult

         /// </summary>

         public ActionResult FileContentResult()

         {

             FileStream fs = new FileStream(Request.PhysicalApplicationPath + "Content/loading.gif", FileMode.Open);

             int length = (int)fs.Length;

             byte[] buffer = new byte[length];

             fs.Read(buffer, 0, length);

             fs.Close();

   

             return base.File(buffer, "image/gif");

         }

   

         // <summary>

        /// Controller.File() - 输出一个文件（文件地址）

         /// 返回类型为 FileContentResult

         /// </summary>

         public ActionResult FilePathResult()

         {

             var path = Request.PhysicalApplicationPath + "Content/loading.gif";

             return base.File(path, "image/gif");

         }

  

         // <summary>

        /// Controller.File() - 输出一个文件（文件流）

         /// 返回类型为 FileContentResult

         /// </summary>

         public ActionResult FileStreamResult()

         {

             FileStream fs = new FileStream(Request.PhysicalApplicationPath + "Content/loading.gif", FileMode.Open);

   

             return base.File(fs, @"image/gif");

         }

  

         /// <summary>

        /// HttpUnauthorizedResult - 响应给客户端错误代码 401（未经授权浏览状态），如果程序启用了 Forms 验证，并且客户端没有任何身份票据，则会跳转到指定的登录页

         /// </summary>

         public ActionResult HttpUnauthorizedResult()

         {

             return new HttpUnauthorizedResult();

         }

   

/// <summary>

/// Controller.PartialView() - 寻找 View ，即 .ascx 文件

/// 返回类型为 PartialViewResult

/// </summary>

    public ActionResult PartialViewResult()

    {

        return base.PartialView();

     }

  

        /// <summary>

         /// Controller.View() - 寻找 View ，即 .aspx 文件

         /// 返回类型为 ViewResult

         /// </summary>

         public ActionResult ViewResult()

         {

             // 如果没有指定 View 名称，则寻找与 Action 名称相同的 View

             return base.View();

         }

   

         /// <summary>

         /// 用于演示处理 JSON 的

         /// </summary>

         public ActionResult JsonDemo()

         {

            return View();

         }

   

       /// <summary>

         /// 用于演示上传文件的

       /// </summary>

         public ActionResult UploadDemo()

        {

            return View();

         }

   

         /// <summary>

         /// 用于演示 Get 方式调用 Action

         /// id 是根据路由过来的；param1和param2是根据参数过来的

         /// </summary>

         [AcceptVerbs(HttpVerbs.Get)]

         public ActionResult GetDemo(int id, string param1, string param2)

         {

             ViewData["ID"] = id;

             ViewData["Param1"] = param1;

             ViewData["Param2"] = param2;

   

             return View();

        }

   

         /// <summary>

         /// 用于演示 Post 方式调用 Action

         /// </summary>

         /// <remarks>

         /// 可以为参数添加声明，如：[Bind(Include = "xxx")] - 只绑定指定的属性（参数），多个用逗号隔开

         /// [Bind(Exclude = "xxx")] - 不绑定指定的属性（参数），多个用逗号隔开

         /// [Bind] 声明同样可以作用于 class 上

         /// </remarks>

         [AcceptVerbs(HttpVerbs.Post)]

         public ActionResult PostDemo(FormCollection fc)

         {

             ViewData["Param1"] = fc["param1"];

             ViewData["Param2"] = fc["param2"];

   

             // 也可以用 Request.Form 方式获取 post 过来的参数

   

             // Request.Form 内的参数也会映射到同名参数。例如，也可用如下方式获取参数  

            // public ActionResult PostDemo(string param1, string param2)

   

             return View("GetDemo");

         }

   

         /// <summary>

         /// 处理上传文件的 Action

         /// </summary>

         /// <param name="file1">与传过来的 file 类型的 input 的 name 相对应</param>

         [AcceptVerbs(HttpVerbs.Post)]

         public ActionResult UploadFile(HttpPostedFileBase file1)

         {

             // Request.Files - 获取需要上传的文件。当然，其也会自动映射到同名参数

             // HttpPostedFileBase hpfb = Request.Files[0] as HttpPostedFileBase;

   

             string targetPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory + "Upload", Path.GetFileName(file1.FileName));

            file1.SaveAs(targetPath);

   

            return View("UploadDemo");

         }

    }

 }