/// <summary>
/// Callback method that is called when the result of a validation rule has changed.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ProcessValidationResult(RuleBinding <TResult> ruleBinding, TResult validationResult)
{
var rule = ruleBinding.ValidationRule;
var bindingGroups = from depBinding in ruleBinding.DependencyBindings
where
depBinding.ValidationRuleDependency.InputOnly == false &&
depBinding.TargetOwnerObject is TEntity
group depBinding by depBinding.TargetOwnerObject as TEntity;
TResult oldValidationResult = null;
if (ValidationResults.ContainsKey(ruleBinding))
{
oldValidationResult = ValidationResults[ruleBinding];
}
foreach (var bindingGroup in bindingGroups)
{
var entity = bindingGroup.Key;
var membersInError = bindingGroup.Select(binding => binding.ValidationRuleDependency.TargetProperty.Name).Distinct().ToArray();
if (HasValidationResult(entity, membersInError, oldValidationResult))
{
ClearValidationResult(entity, membersInError, oldValidationResult);
}
if (HasValidationResult(entity, membersInError, validationResult) == false)
{
SetValidationResult(entity, membersInError, validationResult);
}
}
if (IsValidationSuccess(validationResult) && oldValidationResult != null)
{
ValidationResults.Remove(ruleBinding);
if (EntitiesInErrorChanged != null)
{
EntitiesInErrorChanged(EntitiesInError, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
}
}
else
{
ValidationResults[ruleBinding] = validationResult;
if (EntitiesInErrorChanged != null)
{
EntitiesInErrorChanged(EntitiesInError, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
}
}
if (ValidationResultChanged != null)
{
ValidationResultChanged(this, new ValidationResultChangedEventArgs <TEntity, TResult>(validationResult, bindingGroups.Select(g => g.Key)));
}
}