Detecting WPF controls' Validation Errors when saving

Detecting WPF Validation Errors

using System.Linq;
using System.Windows;
using System.Windows.Controls;

namespace erpcli.Lib
{
    static class Validator
    {
        // LINQ version
        public static bool IsValid(DependencyObject obj)
        {
            // The dependency object is valid if it has no errors and all
            // of its children (that are dependency objects) are error-free.
            // Reference: http://stackoverflow.com/questions/127477/detecting-wpf-validation-errors
            return !Validation.GetHasError(obj) &&
            LogicalTreeHelper.GetChildren(obj)
            .OfType<DependencyObject>()
            .All(IsValid);
        }

        /*
        public static bool IsValid(DependencyObject parent)
        {
            if (Validation.GetHasError(parent))
                return false;

            // Validate all the bindings on the children
            for (int i = 0; i != VisualTreeHelper.GetChildrenCount(parent); ++i)
            {
                DependencyObject child = VisualTreeHelper.GetChild(parent, i);
                if (!IsValid(child)) { return false; }
            }

            return true;
        }
        */
    }
}

Usage:

private void saveButton_Click(object sender, RoutedEventArgs e)
{

  if (Validator.IsValid(this.MyStackPanel)) // is valid
   {

    ....
   }
}

Reference:

http://stackoverflow.com/questions/127477/detecting-wpf-validation-errors