C# 字符串 MinLength 和 MaxLength 验证不起作用 (asp.net mvc)
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String MinLength and MaxLength validation don't work (asp.net mvc)
提问by Heidel
I have this class
我有这堂课
using System.ComponentModel.DataAnnotations;
using Argussoft.BI.DAL.Domain.Users;
namespace Argussoft.BI.DAL.DTOs.UserDTOs
{
public class CreateUserDto
{
[Required(ErrorMessage = "Введите логин")]
[MaxLength(User.EmailLength, ErrorMessage = "Максимальная длина логина 40 символов")]
[RegularExpression(User.NameRegularExpression, ErrorMessage = "Логин может содержать только латинские символы, дефисы, подчеркивания, точки")]
public string Name { get; set; }
[Required(ErrorMessage = "Введите Email")]
[MaxLength(User.EmailLength, ErrorMessage = "Максимальная длина адреса электронной почты 100 символов")]
[RegularExpression(User.EmailRegularExpression, ErrorMessage = "Введите корректный адрес электронной почты")]
public virtual string Email { get; set; }
[Required(ErrorMessage = "Введите имя пользователя")]
[MaxLength(User.FullNameLength, ErrorMessage = "Максимальная длина имени пользователя 100 символов")]
[RegularExpression(User.NameRegularExpression, ErrorMessage = "Имя пользователя может содержать только латинские символы, дефисы, подчеркивания, точки")]
public virtual string FullName { get; set; }
public virtual int Role { get; set; }
[RegularExpression(User.PhoneRegularExpression, ErrorMessage = "Введите корректный номер телефона")]
public virtual string Phone { get; set; }
public virtual int Status { get; set; }
[Required(ErrorMessage = "Введите пароль")]
[MinLength(User.PasswordMinLength, ErrorMessage = "Минимальная длина пароля 5 символов")]
[MaxLength(User.PasswordMaxLength, ErrorMessage = "Максимальная длина пароля 20 символов")]
[RegularExpression(User.PasswordRegularExpression, ErrorMessage = "Пароль может содержать только латинские символы, дефисы, подчеркивания, точки")]
public virtual string Password { get; set; }
}
}
and this form
而这个表格
@model Argussoft.BI.DAL.DTOs.UserDTOs.CreateUserDto
@using (Ajax.BeginForm("CreateUser", "User", new AjaxOptions { OnSuccess = "onSuccessCreateUser" }, new { id = "dialog_form", @class = "form-horizontal" }))
{
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
<h4>Добавить пользователя</h4>
</div>
<div class="modal-body">
<!-- Name -->
<div class="control-group">
<label class="control-label" for="@Html.NameFor(model => model.Name)">Логин</label>
<div class="controls">
<div class="input-prepend">
@Html.TextBoxFor(model => model.Name, new { @class = "span3", id = "input_name" })
<br />
@Html.ValidationMessageFor(model => model.Name)
</div>
</div>
</div>
<!-- Email -->
<div class="control-group">
<label class="control-label" for="@Html.NameFor(model => model.Email)">Email</label>
<div class="controls">
<div class="input-prepend">
@Html.TextBoxFor(model => model.Email, new { @class = "span3", id = "input_email" })
<br />
@Html.ValidationMessageFor(model => model.Email)
</div>
</div>
</div>
<!-- FullName -->
<div class="control-group">
<label class="control-label" for="@Html.NameFor(model => model.FullName)">Имя пользователя</label>
<div class="controls">
<div class="input-prepend">
@Html.TextBoxFor(model => model.FullName, new { @class = "span3", id = "input_full_name" })
<br />
@Html.ValidationMessageFor(model => model.FullName)
</div>
</div>
</div>
<!-- Role -->
<div class="control-group">
<label class="control-label" for="@Html.NameFor(model => model.Role)">Роль пользователя</label>
<div class="controls">
<div class="input-prepend">
@Html.DropDownList("Role", (SelectList)ViewBag.Roles,new{id ="input_role"})
<br />
@Html.ValidationMessageFor(model => model.Role)
</div>
</div>
</div>
<!-- Phone -->
<div class="control-group">
<label class="control-label" for="@Html.NameFor(model => model.Phone)">Контактный телефон</label>
<div class="controls">
<div class="input-prepend">
@Html.TextBoxFor(model => model.Phone, new { @class = "span3", id = "input_phone" })
<br />
@Html.ValidationMessageFor(model => model.Phone)
</div>
</div>
</div>
<!-- Status -->
<div class="control-group">
<label class="control-label" for="@Html.NameFor(model => model.Status)">Статус пользователя</label>
<div class="controls">
<div class="input-prepend">
@Html.DropDownList("Status", (SelectList)ViewBag.UserStatuses,new{id ="input_status"})
<br />
@Html.ValidationMessageFor(model => model.Status)
</div>
</div>
</div>
<!-- Password -->
<div class="control-group">
<label class="control-label" for="@Html.NameFor(model => model.Password)">Пароль пользователя</label>
<div class="controls">
<div class="input-prepend">
@Html.TextBoxFor(model => model.Password, new { @class = "span3", id = "input_password" })
<br />
@Html.ValidationMessageFor(model => model.Password)
</div>
</div>
</div>
</div>
<div class="modal-footer">
<a href="@Url.Action("UserIndex", "User")" class="btn">Отменить</a>
<button type="submit" id="save_button" class="btn btn-primary">Сохранить</button>
</div>
}
User class:
用户类：
public class User : BaseEntity
{
public const int NameLength = 40;
public const int PasswordMinLength = 5;
public const int PasswordMaxLength = 20;
public const int FullNameLength = 100;
public const int EmailLength = 100;
public const int PhoneLength = 40; //...
}
but my validation works only for Requiredand RegularExpressionand doesn't work for MinLengthand MaxLengthand I don't get any error message in this case.
但是我的验证仅适用于RequiredandRegularExpression并且不适用于MinLengthandMaxLength在这种情况下我没有收到任何错误消息。
What can be a reason?
什么是原因？
采纳答案by Imad Alazani
MaxLengthis used for the Entity Framework to decide how large to make a string value field when it creates the database.
MaxLength用于实体框架在创建数据库时决定生成字符串值字段的大小。
From MSDN:
来自 MSDN：
Specifies the maximum length of array or string data allowed in a property.
指定属性中允许的数组或字符串数据的最大长度。
StringLengthis a data annotation that will be used for validation of user input.
StringLength是一个数据注释，将用于验证用户输入。
From MSDN:
来自 MSDN：
Specifies the minimum and maximum length of characters that are allowed in a data field.
指定数据字段中允许的最小和最大字符长度。
Non Customized
非定制
Use [String Length]
用 [String Length]
[RegularExpression(@"^.{3,}$", ErrorMessage = "Minimum 3 characters required")]
[Required(ErrorMessage = "Required")]
[StringLength(30, MinimumLength = 3, ErrorMessage = "Maximum 30 characters")]
30 is the Max Length
Minimum length = 3
30 是最大长度
最小长度 = 3
Customized StringLengthAttribute Class
自定义 StringLengthAttribute 类
public class MyStringLengthAttribute : StringLengthAttribute
{
public MyStringLengthAttribute(int maximumLength)
: base(maximumLength)
{
}
public override bool IsValid(object value)
{
string val = Convert.ToString(value);
if (val.Length < base.MinimumLength)
base.ErrorMessage = "Minimum length should be 3";
if (val.Length > base.MaximumLength)
base.ErrorMessage = "Maximum length should be 6";
return base.IsValid(value);
}
}
public class MyViewModel
{
[MyStringLength(6, MinimumLength = 3)]
public String MyProperty { get; set; }
}
回答by Daniele
Try using this attribute, for example for password min length:
尝试使用此属性，例如密码最小长度：
[StringLength(100, ErrorMessage = "Максимальная длина пароля 20 символов", MinimumLength = User.PasswordMinLength)]
回答by Mrchief
They do now, with latest version of MVC (and jquery validate packages). mvc51-release-notes#Unobtrusive
他们现在使用最新版本的 MVC（和 jquery 验证包）。mvc51-release-notes#不显眼
Thanks to this answerfor pointing it out!
感谢这个答案指出它！
回答by Ruben.sar
[StringLength(16, ErrorMessageResourceName= "PasswordMustBeBetweenMinAndMaxCharacters", ErrorMessageResourceType = typeof(Resources.Resource), MinimumLength = 6)]
[Display(Name = "Password", ResourceType = typeof(Resources.Resource))]
public string Password { get; set; }
Save resource like this
像这样保存资源
"ThePasswordMustBeAtLeastCharactersLong" | "The password must be {1} at least {2} characters long"
回答by amal50
This can replace the MaxLength and the MinLength
这可以替换 MaxLength 和 MinLength
[StringLength(40, MinimumLength = 10 , ErrorMessage = "Password cannot be longer than 40 characters and less than 10 characters")]
