ASP.NET MVC数据标记验证

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   DataAnnotation提供了一个简单的方式，在应用中的Model和View 类中添加验证规则，在ASP.NET MVC中有自动的绑定和UI辅助方法验证支持。首先创建一个实体类Persons，代码如下

Models

 

namespace Mvc2Demo.Models
  {
    public class Person
    {
         [Required(ErrorMessage="用户名不能为空！")]
         public String   Name   { get; set; }
 
          [Range(0,150,ErrorMessage="年龄必须在0-150之间！")]
          [Required(ErrorMessage="年龄不能为空！")]
          public Int32     Age        { get; set; }

        [Required(ErrorMessage="邮箱地址不能为空！")]
        [RegularExpression("\\w+([-+.']\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*",ErrorMessage="邮箱格式不正确，请重新填写！")]   
       public String    Email      { get; set; }
    }
 }

 

 

使用Required 、RegularExpression 等属性需要引用命名空间  

 using System.ComponentModel.DataAnnotations;

 

PersonController

namespace Mvc2Demo.Controllers
 {
    public class PersonController : Controller
      {
         public ActionResult Index()
          {
             return View();
          }
          public ActionResult Create()
         {
             Persons person= new Persons();
            return View(person);
        }
         [HttpPost]
        public ActionResult Create(Person person)       

 {
             if (!ModelState.IsValid)
             {
               return View(person);
             }
            return View("Success");
        }
     }
 }

 

 

View 

 

 <%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<Mvc2Demo.Models.Person>" %>
 2 
 3 <asp:Content ID="Content1" ContentPlaceHolderID="TitleContent" runat="server">
 4     Create
 5 </asp:Content>
 6 
 7 <asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
 8     <h2>Create </h2>
 9     <%= Html.ValidationSummary("Create was unsuccessful. Please correct the errors and try again.") %>
10     <% using (Html.BeginForm()) {%>
11         <fieldset>
12             <legend>Fields</legend>
13             <p>
14                 <label for="Name">Name:</label>
15                 <%= Html.TextBox("Name") %>
16                 <%= Html.ValidationMessage("Name", "*") %>
17             </p>
18             <p>
19                 <label for="Age">Age:</label>
20                 <%= Html.TextBox("Age") %>
21                 <%= Html.ValidationMessage("Age", "*") %>
22             </p>
23             <p>
24                 <label for="Email">Email:</label>
25                 <%= Html.TextBox("Email") %>
26                 <%= Html.ValidationMessage("Email", "*") %>
27             </p>
28             <p>
29                 <input type="submit" value="Create" />
30             </p>
31         </fieldset>
32 
33     <% } %>
34     <div>
35         <%=Html.ActionLink("Back to List", "Index") %>
36     </div>
37 </asp:Content>