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返璞归真 asp.net mvc (3) - Controller/Action

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返璞归真 asp.net mvc (3) - Controller/Action

作者:webabcd

介绍

asp.net mvc 之 Controller 和 Action

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

Action 可以没有返回值。如果 Action 要有返回值的话,其类型必须是 ActionResult

示例

1、Controller/Action

ControllerDemoController.cs

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>

void Void() void Void()

                {

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

                }

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

                /// EmptyResult - 空结果

ActionResult EmptyResult() ActionResult EmptyResult()

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

                        return new EmptyResult();

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

                /// 返回类型为 RedirectResult

ActionResult RedirectResult() ActionResult RedirectResult()

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

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

                /// 返回类型为 RedirectToRouteResult

ActionResult RedirectToRouteResult() ActionResult RedirectToRouteResult()

                        return base.RedirectToAction("ContentResult");

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

                /// 返回类型为 JsonResult

ActionResult JsonResult() ActionResult JsonResult(string name)

                        System.Threading.Thread.Sleep(1000);

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

                        return base.Json(jsonObj);

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

                /// 返回类型为 JavaScriptResult

ActionResult JavaScriptResult() ActionResult JavaScriptResult()

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

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

                /// 返回类型为 ContentResult

ActionResult ContentResult() ActionResult ContentResult()

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

                        return base.Content(contentString);

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

                /// 返回类型为 FileContentResult

ActionResult FileContentResult() 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, "p_w_picpath/gif");

                // <summary>

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

ActionResult FilePathResult() ActionResult FilePathResult()

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

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

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

ActionResult FileStreamResult() ActionResult FileStreamResult()

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

                /// 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

ActionResult HttpUnauthorizedResult() ActionResult HttpUnauthorizedResult()

                        return new HttpUnauthorizedResult();

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

                /// 返回类型为 PartialViewResult

ActionResult PartialViewResult() ActionResult PartialViewResult()

                        return base.PartialView();

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

                /// 返回类型为 ViewResult

ActionResult ViewResult() 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();

                /// 用于演示处理 JSON 的

ActionResult JsonDemo() ActionResult JsonDemo()

                        return View();

                /// 用于演示上传文件的

ActionResult UploadDemo() ActionResult UploadDemo()

                /// 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

                [AcceptVerbs(HttpVerbs.Get)]

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

                        ViewData["ID"] = id;

                        ViewData["Param1"] = param1;

                        ViewData["Param2"] = param2;

                /// 用于演示 Post 方式调用 Action

                /// <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)]

ActionResult PostDemo() 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    

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

                        return View("GetDemo");

                /// 处理上传文件的 Action

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

ActionResult UploadFile() 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");

        }

}

2、Get 方式和 Post 方式调用 Controller 的 Demo

GetDemo.aspx

<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage" %>

<asp:Content ID="Content1" ContentPlaceHolderID="TitleContent" runat="server">

        GetDemo

</asp:Content>

<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">

        <h2>

                GetDemo</h2>

        <div>

                <%= ViewData["ID"] %></div>

                <%= ViewData["Param1"] %></div>

                <%= ViewData["Param2"] %></div>

        <form action="/ControllerDemo/PostDemo" method="post">

        <input id="param1" name="param1" />

        <input id="param2" name="param2" />

        <input type="submit" value="submit" />

        </form>

3、处理 JSON 的 Demo

JsonDemo.aspx

        JsonDemo

        <script src="http://www.cnblogs.com/Scripts/jquery-1.3.2.js" type="text/javascript"></script>

        <script type="text/javascript">

                $.ajaxSetup({

                        cache: false

                });

                $(document).ready(

()() {

                                $('#loading').hide();

                                $('#btnFind').click(

()(event) {

                                                event.preventDefault();

                                                $('#loading').show();

                                                $.getJSON(

                                                        "/ControllerDemo/JsonResult", // 获取 JSON

                                                        { name: $('#txtName')[0].value },

()(data) {

                                                                $('#result').append("name: ");

                                                                $('#result').append(data.Name);

                                                                $('#result').append(" - ");

                                                                $('#result').append("age: ");

                                                                $('#result').append(data.Age);

                                                                $('#result').append("<br />");

                                                                $('#loading').hide();

                                                        }

                                                )

                                        }

                                )

                        }

                )

        </script>

                JsonDemo</h2>

        <div style="margin: 20px 0px">

                <input id="txtName" value="webabcd" />

                   <a href="#" id="btnFind">Find</a>    <span id="loading" style="border: 1px solid #000000;

                        background-color: #FFFFCC; vertical-align: middle; padding: 6px">

                        <img src="http://www.cnblogs.com/Content/Images/loading.gif" alt="Loading" /> Loading</span>

                <div id="result" style="margin: 10px 0px" />

        </div>

4、上传文件的 Demo

UploadDemo.aspx

        UploadDemo

                UploadDemo</h2>

        <!--action - 调用上传文件的 Action-->

        <form action="/ControllerDemo/UploadFile" method="post" enctype="multipart/form-data">

        <input type="file" id="file1" name="file1" />

        <input type="submit" id="upload" name="upload" value="上传" />

OK

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