Question

我想为2个日期选择器创建一个验证规则（startDate少于endDate）。

我创建了一个验证属性：

[AttributeUsage(AttributeTargets.Class, AllowMultiple = true, Inherited = true)]
public sealed class DateCompareAttribute : ValidationAttribute
{
    private const string _defaultErrorMessage = "'{0}' is less then '{1}'.";

    public DateCompareAttribute(string startDateProperty, string endDateProperty)
        : base(_defaultErrorMessage)
    {
        StartDateProperty = startDateProperty;
        EndDateProperty = endDateProperty;
    }

    public string StartDateProperty { get; private set; }
    public string EndDateProperty { get; private set; }


    public override string FormatErrorMessage(string name)
    {
        return String.Format(CultureInfo.CurrentUICulture, ErrorMessageString, StartDateProperty, EndDateProperty);
    }

    public override bool IsValid(object value)
    {
        PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(value);
        object startValue = properties.Find(StartDateProperty, true).GetValue(value);
        object endValue = properties.Find(EndDateProperty, true).GetValue(value);
        if (startValue.GetType() == typeof(DateTime?) && endValue.GetType() == typeof(DateTime?))
        {
            var start = ((DateTime?)startValue);
            var end = ((DateTime?)endValue);
            return (start.Value < end.Value);
        }
        return false;
    }
}

并将ti添加到我的Dto：

[DateCompare("StartDate", "EndDate")]
public class QualificationInput{...}

我创建了一个验证器：

public class DateCompareValidator : DataAnnotationsModelValidator<DateCompareAttribute>
{
    string startField;
    private string endField;
    string _message;

    public DateCompareValidator(ModelMetadata metadata, ControllerContext context, DateCompareAttribute attribute)
        : base(metadata, context, attribute)
    {
        startField = attribute.StartDateProperty;
        endField = attribute.EndDateProperty;
        _message = attribute.ErrorMessage;
    }

    public override IEnumerable<ModelClientValidationRule> GetClientValidationRules()
    {
        var rule = new ModelClientValidationRule
        {
            ErrorMessage = _message,
            ValidationType = "dateCompare"
        };
        rule.ValidationParameters.Add("startField", startField);
        rule.ValidationParameters.Add("endField", endField);

        return new[] { rule };
    }
}

并在Application_Start（）的Global.asax.cs中注册：

DataAnnotationsModelValidatorProvider.RegisterAdapter(typeof(DateCompareAttribute), typeof(DateCompareValidator));

在MicrosoftMvcJQueryValidation.js中，我做了以下更改：

switch (thisRule.ValidationType)
{
.....
   case "dateCompare":
      __MVC_ApplyValidator_DateCompare(rulesObj,
      thisRule.ValidationParameters["startField"], thisRule.ValidationParameters["endField"]);
      break;
.....
}

function __MVC_ApplyValidator_DateCompare(object, startField, endField) {
    object["startField"] = startField;
    object["endField"] = endField;
}

jQuery.validator.addMethod("dateCompare", function(value, element, params) {
    if ($('#' + params["startField"]).val() < $('#' + params["endField"]).val())
    { return true; }
    return false;
}, jQuery.format("Error"));

但是它不起作用:(没有客户端验证这种类型的规则（其他类型如需要工作正常）

我做错了什么？

Answer 1

您不需要更改MicrosoftMvcJQueryValidation.js。我最近不得不自己解决这个问题，以下内容可能有所帮助;

http://www.deepcode.co.uk/2010/08/custom-mvc-2-validation-using-jquery.html

Answer 2

我会复制粘贴整件事，但我认为你最好只阅读Phil Haack的custom validation in MVC指南

首先，我们需要一个模型类。让我们做一些简单的事情，比如客户：

public partial class Customer
{
    public string Name { get; set; }
    public int Age { get; set; }
}

然后验证逻辑

[MetadataType(typeof(CustomerMetaData))]
public partial class Customer
{
    class CustomerMetaData
    {
        [Required(ErrorMessage="You must supply a name for a customer.")]
        [StringLength(50, ErrorMessage = "A customer name cannot exceed 50 characters.")]
        public string Name { get; set; }
    }
}

然后连接你的脚本

<script type="text/javascript" src="../../Scripts/jquery-1.3.2.min.js"></script>
<script type="text/javascript" src="../../Scripts/jquery.validate.min.js"></script>
<script type="text/javascript" src="../../Scripts/MicrosoftMvcJQueryValidation.js"></script>

最后，在表单标记开始之前的某个地方，将以下标记添加到视图代码中：

<% Html.EnableClientValidation(); %>

Answer 3

看起来您正在将DateCompare属性应用于ViewModel类（而不是属性）。这对于服务器验证有效，但意味着它没有机会选择加入客户端验证。请参阅http://blogs.msdn.com/b/stuartleeks/archive/2010/08/06/asp-net-mvc-adding-client-side-validation-to-propertiesmustmatchattribute.aspx。

ASP.NET MVC2自定义jQuery验证：客户端

3 个答案: