MVC中的数据验证

　　　　 //定义用户名必填
        [Required]
        public string UserName { get; set; }
        //定义密码是必填，且满足6-20位
        [Required]
        [StringLength(20, MinimumLength = 6, ErrorMessage = "密码必须是6-20位")]
        public string UserPass { get; set; }

    public class UserInfo
    {
        //定义用户名必填
        [Required]
        public string UserName { get; set; }
        //定义密码是必填，且满足6-20位
        [Required]
        [StringLength(20, MinimumLength = 6, ErrorMessage = "密码必须是6-20位")]
        public string UserPass { get; set; }
        [Required]
        [Compare("UserPass", ErrorMessage = "两次密码不一致")]
        public string ConfirmUserPass { get; set; }
        //邮箱必填且满足，邮箱格式
        [Required]
        [RegularExpression(@"[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}", ErrorMessage = "邮箱格式不正确！")]
        public string Email { get; set; }
        //年龄必填，且满足1~120
        [Required]
        [Range(1, 120, ErrorMessage = "年龄为1到120岁之间")]
        public int Age { get; set; }
    }

 1      public class UserInfoController : Controller
 2     {
 3         //暂时不用Ioc解耦，直接new一个服务实例
 4         UserInfoService userService = new UserInfoService();
 5         // GET: UserInfo
 6         public ActionResult Index()
 7         {
 8             //GetUserList：获取用户列表的
 9             List<UserInfo> userList = userService.GetUserList();
10             return View(userList);
11         }
12         /// <summary>
13         /// 添加用户
14         /// </summary>
15         /// <returns></returns>
16         public ActionResult AddUserInfo()
17         {
18             return View();
19         }
20         [HttpPost]
21         public ActionResult AddUserInfo(UserInfo user)
22         {
23             //使用ModelState.IsValid判断字段格式是否正确
24             if (ModelState.IsValid)
25             {
26                 //TryAddUserInfo：添加用户的服务方法，返回值为bool
27                 if (userService.TryAddUserInfo(user))
28                 {
29                     return Json(new { IsSucess = 1, Message = "添加成功！" });
30                     //return View("Index");前后端不分离时，直接跳转到列表页
31                 }
32                 else
33                 {
34                     return Json(new { IsSucess = 0, Message = "添加失败" });
35                 }
36             }
37             else
38             {
39                 //字段不符合格式
40                 string error = "";
41                 ViewBag.ModelState = ModelState;
42                 foreach (var item in ModelState)
43                 {
44                     if (item.Value.Errors.Count > 0)
45                     {
46                         error += item.Value.Errors.FirstOrDefault().ErrorMessage;
47                     }
48                 }
49                 return Json(new { IsSucess=0,Message=error});
50                 //return View("AddUserInfo");//一般前后端不分离的项目中这样使用最简单
51             }
52         }
53     }

 1     @model Model.UserInfo
 2 　　@{
 3     　　ViewBag.Title = "AddUserInfo";
 4 　　}
 5 　　<h2>添加用户</h2>
 6 @using (Html.BeginForm("AddUserInfo", "UserInfo",FormMethod.Post))
 7 {
 8     <div>
 9         @Html.Label("用户名")： @Html.TextBoxFor(m => m.UserName)
10         @Html.ValidationMessageFor(m => m.UserName)
11     </div>
12     <div>
13         @Html.Label("密码")：@Html.TextBox("UserPass")
14         @Html.ValidationMessageFor(m => m.UserPass)
15     </div>
16 
17     <div>
18         @Html.Label("确认密码")：@Html.TextBox("ConfirmUserPass")
19         @Html.ValidationMessageFor(m => m.ConfirmUserPass)
20     </div>
21     <div>
22         @Html.Label("邮件")：@Html.TextBox("Email")
23         @Html.ValidationMessageFor(m => m.Email)
24     </div>
25     <div>
26         @Html.Label("年龄")：@Html.TextBox("Age")
27         @Html.ValidationMessageFor(m => m.Age)
28     </div>
29     <div><input type="submit" value="提交" /></div>
30 }

[Required]
[StringLength(128,MinimumLength =6,ErrorMessage ="密码不能低于6位数")]

//定义密码必填，且满足6位
[Required]
[StringLength(128,MinimumLength =6)]
 public string Password { get; set; }

[Required]
[StringLength(128,MinimumLength =6,ErrorMessage ="密码不能低于6位数")]
 public string Password { get; set; }

1 public ActionResult DataValidateDemo(UserInfo userInfo)
2         {
3             UserInfo _userInfo = new UserInfo();
4             _userInfo.UserName = userInfo.UserName;
5             return View("Index");
6         }