Question

here i want to validate few textboxes by Element Finding on button Click event

private void button1_Click(object sender, RoutedEventArgs e)
    {
        var button = (Button) sender;

        // button Parent
        var stackPanel = button.Parent as StackPanel;

        // button Parent > parent
        var parentStackPanel = stackPanel.Parent as StackPanel;

        // button Parent > parent > Children
        var childStackPanel = parentStackPanel.Children.Where(a => a is StackPanel).FirstOrDefault() as StackPanel;

        // button Parent > parent > Children >Elements
        var textBox = childStackPanel.Children.Where(a => a is TextBox).FirstOrDefault() as TextBox;
        var image = childStackPanel.Children.Where(a => a is Image).FirstOrDefault() as Image;

        if (textBox.Text == "") image.Source = new BitmapImage(new Uri("/Images/Others/TickWrong.png", UriKind.RelativeOrAbsolute));

    }

the problem is I only able to find First element due to FirstOrDefault()

var childStackPanel = parentStackPanel.Children.Where(a => a is StackPanel).FirstOrDefault() as StackPanel;

is there any possible way to find all the elements .
by Array or something??

Answer 1

Remove FirstOrDefault.

var childStackPanels = parentStackPanel.Children.Where(a => a is StackPanel);

This will return an IEnumerable<T> which you can iterate upon.

To get a list you can use ToList() extension method of IEnumerable<T>