如何序列化与来自各个属性的所有验证属性的模式？ [英] How to serialize a model with all validation attributes from the individual properties?

问题描述

上下文：创建具有MVC控制器方法JSONP服务提供formfields在内的所有验证规则的定义

Context: creating a jsonP service with mvc controller methods which provides a definition of formfields including all validation rules.

我的问题是，我不知道如何序列验证属性。我preFER验证​​的，因为它们是由剃刀定期的mvc视图中使用不引人注目的验证序列化时相同的格式属性。

My problem is that I do not know how to serialize the validation attributes. I prefer the validation attributes in the same format as they are serialized by Razor when using unobtrusive validation in regular Mvc views.

有关序列化到JSON我使用NewtonSoft.Json（4.0.2）。

For serializing to json I use NewtonSoft.Json (4.0.2).

模型的例子：
        公共类档案{

Example of model: public class Profile{

    [Required(ErrorMessage="This field is required.")]
    [StringLength(25, ErrorMessage="Max 25 chars.")]
    public string Firstname{get;set;}
    }

$ P $的例子pferred序列化的JavaScript：

Example of preferred serialized javascript:

     {"Firstname": "John", 
      "ValidationRules":[{"data-val-required":"This field is required.", "data-val-length-max":25, "data-val-length":"Max 25 chars." }]}

任何帮助或指针是非常AP preciated。

Any help or pointers are very much appreciated.

推荐答案

这将构造一个字典，根据数据注解给定属性的属性验证属性：

This will construct a dictionary with the validation attributes for a given property based on the data annotation attributes:

var metadata = ModelMetadataProviders.Current.GetMetadataForProperty(null, typeof(MyModel), "MyProperty");
var validationRules = metadata.GetValidators(ControllerContext).SelectMany(v => v.GetClientValidationRules());
var validationAttributes = new Dictionary<string, string>();

foreach (ModelClientValidationRule rule in validationRules)
{
    string key = "data-val-" + rule.ValidationType;
    validationAttributes.Add(key, HttpUtility.HtmlEncode(rule.ErrorMessage ?? string.Empty));
    key = key + "-";
    foreach (KeyValuePair<string, object> pair in rule.ValidationParameters)
    {
        validationAttributes.Add(key + pair.Key,
            HttpUtility.HtmlAttributeEncode(
                pair.Value != null ? Convert.ToString(pair.Value, CultureInfo.InvariantCulture) : string.Empty));
    }
}

您应该然后序列化validationAttributes字典，在您的自定义JSON序列化code你的财产。

You should then serialize the validationAttributes dictionary with your property in your custom JSON serialization code.

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