/// <summary>
/// Marks the specified FrameworkElement as invalid using the DummyRule
/// in combination with the DummyErrorProperty to fabricate a ValidationError.
/// </summary>
/// <param name="frameworkElement">The framework element that is supposed to have a validation error.</param>
/// <param name="errorContent">Content of the error that is added to the framework element.</param>
/// <param name="newMark">if set to <c>true</c> a new error is simply added else
/// any existing error is cleared before adding.</param>
/// <exception cref="ArgumentNullException" />
public static void MarkInvalid(FrameworkElement frameworkElement, object errorContent, bool newMark)
{
if (frameworkElement == null)
{
throw new ArgumentNullException("Argument 'frameworkElement' must not be null.");
}
if (newMark)
{
DummyRule.ClearInvalid(frameworkElement);
}
if (!BindingOperations.IsDataBound(frameworkElement, DummyRule.DummyErrorProperty))
{
DummyRule rule = new DummyRule(false, errorContent);
Binding binding = new Binding("ErrorContent")
{
Source = rule
};
binding.ValidationRules.Add(rule);
BindingOperations.SetBinding(frameworkElement, DummyRule.DummyErrorProperty, binding);
BindingExpression bindex = BindingOperations.GetBindingExpression(frameworkElement, DummyRule.DummyErrorProperty);
Validation.MarkInvalid(bindex, new ValidationError(rule, binding, errorContent, null));
bindex.UpdateSource();
}
}
/// <summary>
/// Marks the specified FrameworkElement as invalid using the DummyRule
/// in combination with the DummyErrorProperty to fabricate a ValidationError.
/// </summary>
/// <param name="frameworkElement">The framework element that is supposed to have a validation error.</param>
/// <param name="errorContent">Content of the error that is added to the framework element.</param>
/// <exception cref="ArgumentNullException" />
public static void MarkInvalid(FrameworkElement frameworkElement, object errorContent)
{
if (frameworkElement == null)
{
throw new ArgumentNullException("Argument 'frameworkElement' must not be null.");
}
DummyRule.MarkInvalid(frameworkElement, errorContent, false);
}
