首先看看总控制器：
1 using FloatAddBox2.Models; 2 using System; 3 using System.Collections.Generic; 4 using System.Linq; 5 using System.Web; 6 using System.Web.Mvc; 7 ?8 namespace FloatAddBox2.Controllers 9 {10 ????public class HomeController : Controller11 ????{12 ????????//13 ????????// GET: /Home/14 15 ????????public ActionResult Index()16 ????????{17 ????????????return View();18 ????????}19 ????????[HttpGet]20 ????????public ActionResult FloatAdd()21 ????????{22 ????????????return View();23 ????????}24 ????????[HttpPost]25 ????????public ActionResult CalSum(Box box)26 ????????{27 28 ????????????box.Sum = box.FirstNum + box.SecondNum;29 ????????????return View("FloatAdd", box);30 ????????}31 ????}32 }代码较短，其中的CalSum中把Box中的两数相加给了Sum，FloatAdd只是为View创建的空控制器，而Index中无任何代码，只是作为首页。
接下来看看View代码：
@model FloatAddBox2.Models.Box@{ ???ViewBag.Title = "FloatAdd";}<h2>FloatAdd</h2>@using (Html.BeginForm("CalSum","Home",FormMethod.Post)) { ???@Html.ValidationSummary(true) ???<fieldset> ???????<legend>Box</legend> ???????<div class="editor-label"> ???????????@Html.LabelFor(model => model.FirstNum) ???????</div> ???????<div class="editor-field"> ???????????@Html.EditorFor(model => model.FirstNum) ???????????@Html.ValidationMessageFor(model => model.FirstNum) ???????</div> ???????<div class="editor-label"> ???????????@Html.LabelFor(model => model.SecondNum) ???????</div> ???????<div class="editor-field"> ???????????@Html.EditorFor(model => model.SecondNum) ???????????@Html.ValidationMessageFor(model => model.SecondNum) ???????</div> ???????<div class="editor-label"> ???????????@Html.LabelFor(model => model.Sum) ???????</div> ???????<div class="editor-field"> ???????????@Html.DisplayFor(model => model.Sum) ???????</div> ???????<p> ???????????<input type="submit" value="Create" /> ???????</p> ???</fieldset>}<div> ???@Html.ActionLink("Back to List", "Index")</div>@section Scripts { ???@Scripts.Render("~/bundles/jqueryval")}这个View中是对Model中的Box一个强类型。
而Index的View中只有显示标题的代码：
@{ ???ViewBag.Title = "Index";}<h2>Index</h2>Model中Box的代码：
using System;using System.Collections.Generic;using System.ComponentModel.DataAnnotations;using System.Linq;using System.Web;namespace FloatAddBox2.Models{ ???public class Box ???{ ???????[Display(Name="加数")] ???????[Range(0,100)] ???????public float FirstNum { set; get; } ???????[Display(Name = "加数")] ???????[Range(0,100)] ???????public float SecondNum { set; get; }
[Display(Name = "和值")] ???????public float Sum { set; get; } ???}}创建了三个：FirstNum，SecondNum，Sum 。
前两个的取值范围都为0~100之间，否则自动报错。。
三个都有着set和get。而且都作了汉化。
MVC-- 网页中整、小数加法
原文地址：https://www.cnblogs.com/Exesoft-Mike/p/9500644.html