public IEnumerable <ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
{
var rule = new ModelClientValidationRule()
{
ErrorMessage = FormatErrorMessage(metadata.GetDisplayName()),
ValidationType = "requiredifany",
};
var properties = new List <string>();
var values = new List <object>();
for (int i = 0; i < DependentProperties.Count(); i++)
{
string depProp = BuildDependentPropertyId(metadata, context as ViewContext, DependentProperties[i]);
// find the value on the control we depend on;
// if it's a bool, format it javascript style
// (the default is True or False!)
string targetValue = (TargetValues[i] ?? "").ToString();
if (TargetValues[i].GetType() == typeof(bool))
{
targetValue = targetValue.ToLower();
}
properties.Add(depProp);
values.Add(targetValue);
}
rule.ValidationParameters.Add("dependentproperties", String.Join("|", properties));
rule.ValidationParameters.Add("targetvalues", String.Join("|", values));
yield return(rule);
}
protected override ValidationResult IsValid(object value, ValidationContext validationContext)
{
for (int i = 0; i < DependentProperties.Count(); i++)
{
// get a reference to the property this validation depends upon
var containerType = validationContext.ObjectInstance.GetType();
var field = containerType.GetProperty(this.DependentProperties[i]);
if (field != null)
{
// get the value of the dependent property
var dependentvalue = field.GetValue(validationContext.ObjectInstance, null);
// compare the value against the target value
if ((dependentvalue == null && this.TargetValues[i] == null) ||
(dependentvalue != null && dependentvalue.Equals(this.TargetValues[i])))
{
// match => means we should try validating this field
if (!_innerAttribute.IsValid(value))
{
// validation failed - return an error
return(new ValidationResult(this.ErrorMessage, new[] { validationContext.MemberName }));
}
}
}
}
return(ValidationResult.Success);
}