Model驗證功能

2019-11-14 16:10:17

字體：大中小

來源：轉載

供稿：網友

占位符

{0}對應屬性

{1}對應minimum

{2}對應maximum

[StringLength(15, MinimumLength = 6, ErrorMessage = "密碼長度必須在{2}和{1}之間")]

先創建一個資源文件

為了實現這種驗證效果

資源文件里可以這樣寫

然后新建一個類，這個類主要實現驗證和其它一些額外的屬性，這個類是部分類，有加partial關鍵字，寫注解別忘了加

System.ComponentModel.DataAnnotations命名空間

[MetadataType(typeof(Login_UserMetaData))]    public partial class Login_User    {        //驗證需要用到        public class Login_UserMetaData        {            [Display(Name="用戶名")]            [Required(ErrorMessageResourceName="Required",ErrorMessageResourceType=typeof(Resource))]            public string UserName { get; set; }            [Display(Name="密碼")]            [Required(ErrorMessageResourceName = "Required", ErrorMessageResourceType = typeof(Resource))]            public string PassWord { get; set; }        }    }

然后控制器大概就需要這樣的代碼，記得action方法傳進來的參數類型是類名，如果用string username這種形式，ModelState.IsValid將無效

[HttpPost]        public ActionResult Login(Login_User loginUser)        {            if (!ModelState.IsValid)            {//驗證不通過返回                return View();            }            Login_User user=userManager.Login(loginUser.UserName, loginUser.Password);            if (user == null)            {//用戶密碼錯誤！                ViewBag.error = "用戶名或密碼錯誤！";                return View();            }            session["user"] = user;            return RedirectToAction("index", "home");        }

這樣做了之后，就可以實現服務端驗證了，但這樣還不夠，這里還需要使用客戶端驗證，這可以大大減輕服務器負擔。

view中的代碼如下：

@{    ViewBag.Title = "后臺登陸";}@model Letter.Data.Model.Login_User<script src="~/Scripts/jquery.validate.min.js"></script><script src="~/Scripts/jquery.validate.unobtrusive.min.js"></script>@using(Html.BeginForm()){    <div>          <label for="username">用戶名:</label>          @Html.TextBoxFor(u=>u.UserName) @Html.ValidationMessage("UserName")      </div>      <div>          <label for="password">密碼:</label>          @Html.PasswordFor(u=>u.Password) @Html.ValidationMessage("Password")    </div>    <div>        <input type="submit" value="登錄" />@ViewBag.error    </div>}

web.config應該有如下配置才有效

附上一個比較完整的驗證

using System;using System.Collections.Generic;using System.Data.Entity;using System.Linq;using System.Web;using System.ComponentModel.DataAnnotations;namespace RegisterValidation.Models{        public partial class User    {        [Key]        public int ID { get; set; }        [Display(Name="姓名")]        [Required(ErrorMessageResourceName="Required",ErrorMessageResourceType=typeof(Resource))]        public string Name { get; set; }        [Display(Name="生日")]        //[RegularEx        [Required(ErrorMessageResourceName="Required",ErrorMessageResourceType=typeof(Resource))]        public DateTime? Birthday { get; set; }        [Display(Name="年齡")]        [Range(18,60,ErrorMessageResourceName="Range",ErrorMessageResourceType=typeof(Resource))]        public int Age { get; set; }        [Display(Name="用戶名")]        [Required(ErrorMessageResourceName = "Required", ErrorMessageResourceType = typeof(Resource))]        public string Username { get; set; }        [Display(Name="密碼")]        [Required(ErrorMessageResourceName="Required",ErrorMessageResourceType=typeof(Resource))]        public string Password { get; set; }        [Display(Name="郵箱")]        [Required(ErrorMessageResourceName="Required",ErrorMessageResourceType=typeof(Resource))]        [RegularExpression(@"^/w+((-/w+)|(/./w+))*/@[A-Za-z0-9]+((/.|-)[A-Za-z0-9]+)*/.[A-Za-z0-9]+$",ErrorMessageResourceName="Regular",ErrorMessageResourceType=typeof(Resource))]        public string Email { get; set; }    }    public class UserDBContext : DbContext    {        public DbSet<User> Users { get; set; }    }}

另一個部分user類，包含確認密碼

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.ComponentModel.DataAnnotations;namespace RegisterValidation.Models{    public partial  class User    {        [Display(Name="確認密碼")]        [Required(ErrorMessageResourceName = "Required", ErrorMessageResourceType = typeof(Resource))]        [StringLength(10,MinimumLength=5,ErrorMessageResourceName="StringLength",ErrorMessageResourceType=typeof(Resource))]        [Compare("Password",ErrorMessageResourceName="Compare",ErrorMessageResourceType=typeof(Resource))]        public string PasswordConfirm { get; set; }    }}