Maximum number of lines for a Wrap TextBlock

Question

I have a TextBlock with the following setting:

TextWrapping=\"Wrap\"

Can I determine the maximum number of lines?

for exam

Answer 1

Based on @artistandsocial's answer, I created a attached property to set the maximum number of lines programatically (rather than having to overload TextBlock which is discouraged in WPF).

public class LineHeightBehavior
{
    public static readonly DependencyProperty MaxLinesProperty =
        DependencyProperty.RegisterAttached(
            "MaxLines",
            typeof(int),
            typeof(LineHeightBehavior),
            new PropertyMetadata(default(int), OnMaxLinesPropertyChangedCallback));

    public static void SetMaxLines(DependencyObject element, int value)
    {
        element.SetValue(MaxLinesProperty, value);
    }

    public static int GetMaxLines(DependencyObject element)
    {
        return (int)element.GetValue(MaxLinesProperty);
    }

    private static void OnMaxLinesPropertyChangedCallback(
        DependencyObject d,
        DependencyPropertyChangedEventArgs e)
    {
        var element = d as TextBlock;
        if (element != null)
        {
            element.MaxHeight = element.LineHeight * GetMaxLines(element);
        }
    }
}

By default, the LineHeight is set to double.NaN, so this value must first be set manually.

The attached property MaxLines and other relevant properties can then be set in a Style: