MVC学习手册之数据注解与验证

MVC学习手册之数据注解与验证

新建一个MVC5的WEB应用程序，VS2013会自动生成一段代码，以下是Account控制器下Register.cshtml 页面的代码：

@model WebApplication1.Models.RegisterViewModel
@{
    ViewBag.Title = "注册";
}

<h2>@ViewBag.Title。</h2>

@using (Html.BeginForm("Register", "Account", FormMethod.Post, new { @class = "form-horizontal", role = "form" }))
{
    @Html.AntiForgeryToken()
    <h4>创建新帐户。</h4>
    <hr />
    @Html.ValidationSummary()
    <div class="form-group">
        @Html.LabelFor(m => m.UserName, new { @class = "col-md-2 control-label" })
        <div class="col-md-10">
            @Html.TextBoxFor(m => m.UserName, new { @class = "form-control" })
        </div>
    </div>
    <div class="form-group">
        @Html.LabelFor(m => m.Password, new { @class = "col-md-2 control-label" })
        <div class="col-md-10">
            @Html.PasswordFor(m => m.Password, new { @class = "form-control" })
        </div>
    </div>
    <div class="form-group">
        @Html.LabelFor(m => m.ConfirmPassword, new { @class = "col-md-2 control-label" })
        <div class="col-md-10">
            @Html.PasswordFor(m => m.ConfirmPassword, new { @class = "form-control" })
        </div>
    </div>
    <div class="form-group">
        <div class="col-md-offset-2 col-md-10">
            <input type="submit" class="btn btn-default" value="注册" />
        </div>
    </div>
}

@section Scripts {
    @Scripts.Render("~/bundles/jqueryval")
}

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" 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可以看到，通过调用HTML辅助方法，可以很方便的生成我们想要的html代码，并提供很方便的数据验证功能。这里只是简单的举一些常用的特性：

    public class RegisterViewModel
    {
        [Required(ErrorMessage = "用户名是必须的")]
        [Display(Name = "用户名")]
        public string UserName { get; set; }

        [Required]
        [StringLength(, ErrorMessage = "{0} 必须至少包含 {2} 个字符。", MinimumLength = )]
        [DataType(DataType.Password)]
        [Display(Name = "密码")]
        public string Password { get; set; }

        [DataType(DataType.Password)]
        [Display(Name = "确认密码")]
        [Compare("Password", ErrorMessage = "密码和确认密码不匹配。")]
        public string ConfirmPassword { get; set; }
    }

• Required 特性：用它标记的属性表示必须的，在数据验证时如果为空，则返回错误消息（通过 ErrorMessage 这个参数可以自定义返回的消息和消息类型）。
• Display　　特性：它标记的属性，在调用Html辅助方法时会读取它的 Name 参数的值并显示。如上面的LabelFor（m=>m.UserName)它返回的就是 Name 参数的值。

• DataType 特性：它规定了所标记属性的数据显示类型， 在 DataType 这个枚举类型中定义了很多显示方式，如Password 表示以密码的方式显示，这样在用户输入密码时就不会以明文显示。
• StringLength 特性：它规定了所标记属性的的长度范围，如 Password 这个属性的最大长度为100个字符。

• Compare 特性：它修饰的属性可以与另一个属性相比较，如果它们的值相等，则返回true 否则为false ，如果为false 就返回 ErrorMessage 的值。如 ConfirmPassword 这个属性会自动与 Password 这个属性比较。
• RegularExpression 特性：正则表达式，用它修饰的属性会通过它将属性的值转换为正则表达式，在于所给定的参数比较，如果不相符，就返回 ErrorMessage 的值。
• Range 特性：它规定了所修饰的属性的值的可取值范围。如 [Range（34，43）]public int Age{get;set;} 那么Age的可取值为34到43，如果不在这个范围就返回 ErrorMessage 的值。
• Remote 特性：它所修饰的属性可以与远端服务器进行验证。如 [Remote("CheckUserName","Account")]public string UserName{get;set;} 会将UserName属性的值返回到服务器，并通过 Account 控制器下的 CheckUserName(string username)方法来进行处理。

前面讲完了一些基本的用于数据验证的特性操作（这些特性也叫做注解），那么接下来就来讲讲如何创建自定的验证操作：

自定义注解需要从 ValidationAttribute 派生自己类，并重写一个版本的 IsValid() 方法。如下面的例子创建了一个自定义的最大化的单词数的注解（特性）：

    public class MaxWordsAttribute : ValidationAttribute
    {
        private readonly int _maxWords;

        public MaxWordsAttribute(int maxWords):base("{0}的单词数过多!")
        {
            _maxWords = maxWords;
        }

        protected override ValidationResult IsValid(object value, ValidationContext validationContext)
        {
            if (value != null)
            {
                var valueAsString = value as string;
                if (valueAsString.Split(' ').Length > _maxWords)
                {
                    var errorMessage = FormatErrorMessage(validationContext.DisplayName);
                    return new ValidationResult(errorMessage);
                }
            }
            return ValidationResult.Success;
        }
    }

通过空格将字符串分割为多个字符串，并计算子字符串的数目与限定的最大字符串数目比较，如果超过了限定，就返回 errorMessage 的值，在通过 FormatErrorMessage 方法重写了默认实现方式。

下面是被标记的UserName属性以及操作的结果：

        [MaxWords()]
        [Required(ErrorMessage = "用户名是必须的")]
        [Display(Name = "用户名")]
        public string UserName { get; set; }

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" alt="" />

类似的我们可以自定义其它注解与验证方式。

参考资料： ASP.NET MVC 5 高级编程（第5版）