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字符串 MinLength 和 MaxLength 验证不起作用 (asp.net mvc)
[英] String MinLength and MaxLength validation don't work (asp.net mvc)
本文介绍了字符串 MinLength 和 MaxLength 验证不起作用 (asp.net mvc)的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有这门课
使用 System.ComponentModel.DataAnnotations;使用 Argussoft.BI.DAL.Domain.Users；命名空间 Argussoft.BI.DAL.DTOs.UserDTOs{公共类 CreateUserDto{[必需(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")公共字符串名称 { 获取；放;}[必填(ErrorMessage = "Введите Email")][MaxLength(User.EmailLength, ErrorMessage = "Максимальная длина адреса электронной почты 100 символов")][RegularExpression(User.EmailRegularExpression, ErrorMessage = "Введите корректный адрес электронной почты")]公共虚拟字符串 Email { get;放;}[必填(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, подчеркивачить)公共虚拟字符串 FullName { get;放;}公共虚拟 int 角色 { 获取；放;}[RegularExpression(User.PhoneRegularExpression, ErrorMessage = "Введите корректный номер телефона")]公共虚拟字符串 Phone { get;放;}公共虚拟 int 状态 { 获取；放;}[必填(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)"公共虚拟字符串密码{获取；放;}}}
还有这个表格
@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 class="modal-body"><!-- 名称--><div class="control-group"><label class="control-label" for="@Html.NameFor(model => model.Name)">Логин</label><div class="控件"><div class="input-prepend">@Html.TextBoxFor(model => model.Name, new { @class = "span3", id = "input_name" })<br/>@Html.ValidationMessageFor(model =>model.Name)
<!-- 电子邮件--><div class="control-group"><label class="control-label" for="@Html.NameFor(model => model.Email)">Email</label><div class="控件"><div class="input-prepend">@Html.TextBoxFor(model => model.Email, new { @class = "span3", id = "input_email" })<br/>@Html.ValidationMessageFor(model => model.Email)
<!-- 全名--><div class="control-group"><label class="control-label" for="@Html.NameFor(model => model.FullName)">Имя пользователя</label><div class="控件"><div class="input-prepend">@Html.TextBoxFor(model => model.FullName, new { @class = "span3", id = "input_full_name" })<br/>@Html.ValidationMessageFor(model => model.FullName)
<!-- 角色--><div class="control-group"><label class="control-label" for="@Html.NameFor(model => model.Role)">Роль пользователя</label><div class="控件"><div class="input-prepend">@Html.DropDownList("Role", (SelectList)ViewBag.Roles,new{id ="input_role"})<br/>@Html.ValidationMessageFor(model =>model.Role)
<!-- 电话--><div class="control-group"><label class="control-label" for="@Html.NameFor(model => model.Phone)">Контактный телефон</label><div class="控件"><div class="input-prepend">@Html.TextBoxFor(model => model.Phone, new { @class = "span3", id = "input_phone" })<br/>@Html.ValidationMessageFor(model =>model.Phone)
<!-- 状态--><div class="control-group"><label class="control-label" for="@Html.NameFor(model => model.Status)">Статус пользователя</label><div class="控件"><div class="input-prepend">@Html.DropDownList("Status", (SelectList)ViewBag.UserStatuses,new{id ="input_status"})<br/>@Html.ValidationMessageFor(model => model.Status)
<!-- 密码--><div class="control-group"><label class="control-label" for="@Html.NameFor(model => model.Password)">Пароль пользователя</label><div class="控件"><div class="input-prepend">@Html.TextBoxFor(model => model.Password, new { @class = "span3", id = "input_password" })<br/>@Html.ValidationMessageFor(model => model.Password)
<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>
}
用户类别:
公共类用户:BaseEntity{public const int NameLength = 40;public const int PasswordMinLength = 5;public const int PasswordMaxLength = 20;public const int FullNameLength = 100;公共常量 int EmailLength = 100;public const int PhoneLength = 40;//...}
但我的验证仅适用于 Required 和 RegularExpression 而不适用于 MinLength 和 MaxLength 和在这种情况下，我没有收到任何错误消息.
可能是什么原因?
解决方案
MaxLength 用于实体框架在创建数据库时决定字符串值字段的大小.
来自 MSDN:
<块引用>指定数组的最大长度或属性中允许的字符串数据.
StringLength 是用于验证用户输入的数据注释.
来自 MSDN:
<块引用>指定最小值和最大值允许的字符长度在数据字段中.
非定制
使用[字符串长度]
[RegularExpression(@"^.{3,}$", ErrorMessage = "最少需要 3 个字符")][必需(ErrorMessage =必需")][StringLength(30, MinimumLength = 3, ErrorMessage = "Maximum 30 characters")]
<块引用>
30 是最大长度
最小长度 = 3
自定义 StringLengthAttribute 类
公共类 MyStringLengthAttribute : StringLengthAttribute{公共 MyStringLengthAttribute(int maximumLength):基础(最大长度){}公共覆盖 bool IsValid(对象值){字符串 val = Convert.ToString(value);if (val.Length < base.MinimumLength)base.ErrorMessage = "最小长度应为 3";if (val.Length > base.MaximumLength)base.ErrorMessage = "最大长度为 6";返回 base.IsValid(value);}}公共类 MyViewModel{[MyStringLength(6, MinimumLength = 3)]公共字符串 MyProperty { 获取；放;}}
I have this class
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
@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:
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 Required and RegularExpression and doesn't work for MinLength and MaxLength and I don't get any error message in this case.
What can be a reason?
解决方案
MaxLength is used for the Entity Framework to decide how large to make a string value field when it creates the database.
From MSDN:
Specifies the maximum length of array
or string data allowed in a property.
StringLength is a data annotation that will be used for validation of user input.
From MSDN:
Specifies the minimum and maximum
length of characters that are allowed
in a data field.
Non Customized
Use [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
Customized StringLengthAttribute Class
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; }
}
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