View-Control-Model基础，强类型视图，添加验证 Sample

ViewsHomeIndex.cshtml

@*通过Binder机制把表单Post的数据赋给参数对象对应的属性*@
@model MvcHelloWorld.Models.Person

@{
    ViewBag.Title = "Index";
}

<div>
<h1>Please Input Your Information</h1>
@using (Html.BeginForm("SendInformation","Home"))
{
    <p>@Html.ValidationSummary()</p>
    <p>Your Name:@Html.TextBoxFor(x=>x.Name)</p>
    <p>Your Email:@Html.TextBoxFor(x=>x.Email)</p>
    <p>Your Phone:@Html.TextBoxFor(x=>x.Phone)</p>
    <p>Gender:
        @Html.DropDownListFor(x=>x.Gender,
            new[]{
            new SelectListItem(){Text="I am boy",Selected=true,Value="Male"},
            new SelectListItem(){Text="I am girl",Selected=false,Value="Female"},
            },"Please select your gender")</p>
    <p><input type="submit" value="Submit Your Information"/></p>
}
</div>

ViewsHomeWelcome.cshtml

@{
    //显示当前页面的标题的
    ViewBag.Title = "Welcome";
}

<h2>@ViewBag.name Welcome</h2>

ModelsHomeModels.cs

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

//验证必须应用该命名空间，在页面里添加@Html.ValidationSummary()，在Action里添加
//if(ModelState.IsValid)
//{
//    return Content("Thank You," + person.Name + "," + person.Email + "," + person.Phone + "," + person.Gender);
//}
//else
//{
//    return View("Index");
//}
using System.ComponentModel.DataAnnotations;

namespace MvcHelloWorld.Models
{
    public class Person
    {
        [Required(ErrorMessage="Please enter your name")]
        public string Name { get; set; }

        [Required(ErrorMessage="Please enter your email address")]
        public string Email { get; set; }

        [Required(ErrorMessage=("Please enter your phone number"))]
        public string Phone { get; set; }

        [Required(ErrorMessage="Please select your gender")]
        public string Gender { get; set; }

    }
}

ControllersHomeController.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using MvcHelloWorld.Models;

namespace MvcHelloWorld.Controllers
{
    public class HomeController : Controller
    {
        //
        // GET: /Home/

        public ActionResult Index()
        {
            return View();
        }

        ////系统默认请求被路由到HomeController和Index这个Action
        //public string Index()
        //{
        //    //直接写字符串到客户端,可以不用添加 Index.cshtml 页面
        //    return "<h2>Index action returns string 'Hello world' directly</h2>";
        //}

        //返回非字符串, 需要添加 Welcome.cshtml
        public ActionResult Welcome()
        {
            //ViewBag是Controller定义的一个动态类型的属性，意味着你可以给他添加任何属性，在编译时动态类型的属性是不检查的
            //页面可通过 @ViewBag.XX 直接调用值
            ViewBag.name = "Welcome action returns View to show ViewBag name";
            return View();
        }

        public ActionResult SendInformation(Person person)
        {
            if(ModelState.IsValid)
            {
                return Content("Thank You," + person.Name + "," + person.Email + "," + person.Phone + "," + person.Gender);
            }
            else
            {
                return View("Index");
            }
        }

    }
}