WPF 在子頁面中獲取父類窗體

　　WPF 在子頁面中獲取父類窗體

/// <summary>
/// 子頁面獲取父類窗體
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="reference"></param>
/// <returns></returns>
public static T GetAncestor<T>(DependencyObject reference) where T : DependencyObject
{
    DependencyObject parent = VisualTreeHelper.GetParent(reference);
    while (!(parent is T) && parent != null)
    {
        parent = VisualTreeHelper.GetParent(parent);
    }
    if (parent != null)
        return (T)parent;
    else
        return null;
}

//在子頁面中調用
GetAncestor<MainWindow>(this);