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POASP.NET MVC2 Custom jQuery validation: client -side
 

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    <p>I want to create a validation rule for 2 date-pickers (startDate less then endDate).</p> <p>I create a validation attribute:</p> <pre><code>[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?) &amp;&amp; endValue.GetType() == typeof(DateTime?)) { var start = ((DateTime?)startValue); var end = ((DateTime?)endValue); return (start.Value &lt; end.Value); } return false; } } </code></pre> <p>and added ti to my Dto:</p> <pre><code>[DateCompare("StartDate", "EndDate")] public class QualificationInput{...} </code></pre> <p>I created a validator:</p> <pre><code>public class DateCompareValidator : DataAnnotationsModelValidator&lt;DateCompareAttribute&gt; { 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&lt;ModelClientValidationRule&gt; GetClientValidationRules() { var rule = new ModelClientValidationRule { ErrorMessage = _message, ValidationType = "dateCompare" }; rule.ValidationParameters.Add("startField", startField); rule.ValidationParameters.Add("endField", endField); return new[] { rule }; } } </code></pre> <p>And registered it in Global.asax.cs in Application_Start():</p> <pre><code>DataAnnotationsModelValidatorProvider.RegisterAdapter(typeof(DateCompareAttribute), typeof(DateCompareValidator)); </code></pre> <p>In MicrosoftMvcJQueryValidation.js I have made this changes:</p> <pre><code>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() &lt; $('#' + params["endField"]).val()) { return true; } return false; }, jQuery.format("Error")); </code></pre> <p>But it doesn't work :( no client side validation on this type of rule (the others type like required works fine)</p> <p>What I'm doing wrong?</p>
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