占位符
{0}对应属性
{1}对应minimum
{2}对应maximum
[StringLength(15, MinimumLength = 6, ErrorMessage = "密码长度必须在{2}和{1}之间")]
先创建一个资源文件
为了实现这种验证效果
资源文件里可以这样写
然后新建一个类，这个类主要实现验证和其它一些额外的属性，这个类是部分类，有加partial关键字，写注解别忘了加
System.ComponentModel.DataAnnotations命名空间
[MetadataType(typeof(Login_UserMetaData))]publicpartialclassLogin_User
{//验证需要用到publicclassLogin_UserMetaData
{
[Display(Name="用户名")]
[Required(ErrorMessageResourceName="Required",ErrorMessageResourceType=typeof(Resource))]publicstringUserName {get;set; }
[Display(Name="密码")]
[Required(ErrorMessageResourceName="Required", ErrorMessageResourceType =typeof(Resource))]publicstringPassWord{get;set; }
}
}
然后控制器大概就需要这样的代码，记得action方法传进来的参数类型是类名，如果用string username这种形式，ModelState.IsValid将无效
[HttpPost]publicActionResult Login(Login_User loginUser)
{if(!ModelState.IsValid)
{//验证不通过返回returnView();
}
Login_User user=userManager.Login(loginUser.UserName, loginUser.Password);if(user ==null)
{//用户密码错误！ViewBag.error ="用户名或密码错误！";returnView();
}session["user"] =user;returnRedirectToAction("index","home");
}
这样做了之后，就可以实现服务端验证了，但这样还不够，这里还需要使用客户端验证，这可以大大减轻服务器负担。
view中的代码如下：
@{
ViewBag.Title="后台登陆";
}
@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>
<labelfor="username">用户名:</label>@Html.TextBoxFor(u=>u.UserName) @Html.ValidationMessage("UserName")</div>
<div>
<labelfor="password">密码:</label>@Html.PasswordFor(u=>u.Password) @Html.ValidationMessage("Password")</div>
<div>
<input type="submit"value="登录"/>@ViewBag.error</div>}
web.config应该有如下配置才有效
附上一个比较完整的验证
usingSystem;usingSystem.Collections.Generic;usingSystem.Data.Entity;usingSystem.Linq;usingSystem.Web;usingSystem.ComponentModel.DataAnnotations;namespaceRegisterValidation.Models
{publicpartialclassUser
{
[Key]publicintID {get;set; }
[Display(Name="姓名")]
[Required(ErrorMessageResourceName="Required",ErrorMessageResourceType=typeof(Resource))]publicstringName {get;set; }
[Display(Name="生日")]//[RegularExPRession(@"^\d{4}(\-|\/|\.)\d{1,2}\1\d{1,2}$",ErrorMessageResourceName="Regular",ErrorMessageResourceType=typeof(Resource))][Required(ErrorMessageResourceName="Required",ErrorMessageResourceType=typeof(Resource))]publicDateTime? Birthday {get;set; }
[Display(Name="年龄")]
[Range(18,60,ErrorMessageResourceName="Range",ErrorMessageResourceType=typeof(Resource))]publicintAge {get;set; }
[Display(Name="用户名")]
[Required(ErrorMessageResourceName="Required", ErrorMessageResourceType =typeof(Resource))]publicstringUsername {get;set; }
[Display(Name="密码")]
[Required(ErrorMessageResourceName="Required",ErrorMessageResourceType=typeof(Resource))]publicstringPassword {get;set; }
[Display(Name="邮箱")]
[Required(ErrorMessageResourceName="Required",ErrorMessageResourceType=typeof(Resource))]
[RegularExpression(@"^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$",ErrorMessageResourceName="Regular",ErrorMessageResourceType=typeof(Resource))]publicstringEmail {get;set; }
}publicclassUserDBContext : DbContext
{publicDbSet<User> Users {get;set; }
}
}
另一个部分user类，包含确认密码
usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Web;usingSystem.ComponentModel.DataAnnotations;namespaceRegisterValidation.Models
{publicpartialclassUser
{
[Display(Name="确认密码")]
[Required(ErrorMessageResourceName="Required", ErrorMessageResourceType =typeof(Resource))]
[StringLength(10,MinimumLength=5,ErrorMessageResourceName="StringLength",ErrorMessageResourceType=typeof(Resource))]
[Compare("Password",ErrorMessageResourceName="Compare",ErrorMessageResourceType=typeof(Resource))]publicstringPasswordConfirm {get;set; }
}
}
资源文件如下
效果如下