Hi. I want to create a validation rule for 2 date-pickers (startDate less then endDate).
I create a validation attribute:
[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;
}
}
and added ti to my Dto:
[DateCompare("StartDate", "EndDate")]
public class QualificationInput{...}
I created a validator:
public class DateCompareValidator : DataAnnotationsModelValidator
{
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 };
}
}
And registered it in Global.asax.cs in Application_Start():
DataAnnotationsModelValidatorProvider
.RegisterAdapter(typeof(DateCompareAttribute), typeof(DateCompareValidator));
In MicrosoftMvcJQueryValidation.js I have made this changes:
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"));
But it doesn't work :( no client side validation on this type of rule (the others type like required works fine)
What I'm doing wrong?
