WPF查找子控件和父控件方法

一、查找某种类型的子控件,并返回一个List集合
    public List<T> GetChildObjects<T>(DependencyObject obj, Type typename) where T : FrameworkElement
        {
            DependencyObject child = null;
            List<T> childList = new List<T>();
    for (int i = 0; i <= VisualTreeHelper.GetChildrenCount(obj) - 1; i++)
            {
                child = VisualTreeHelper.GetChild(obj, i);
    if (child is T && (((T)child).GetType() == typename))
                {
                    childList.Add((T)child);
                }
                childList.AddRange(GetChildObjects<T>(child,typename));
            }
    return childList;
        }
调用:
    List<Button> listButtons = GetChildObjects<Button>(parentPanel, typeof(Button));
二、通过名称查找子控件,并返回一个List集合
    public List<T> GetChildObjects<T>(DependencyObject obj, string name) where T : FrameworkElement
        {
            DependencyObject child = null;
            List<T> childList = new List<T>();
    for (int i = 0; i <= VisualTreeHelper.GetChildrenCount(obj) - 1; i++)
            {
                child = VisualTreeHelper.GetChild(obj, i);
    if (child is T && (((T)child).GetType() == name |string.IsNullOrEmpty(name)))
                {
                    childList.Add((T)child);
                }
                childList.AddRange(GetChildObjects<T>(child,name));
            }
    return childList;
        }
调用:
    List<Button> listButtons = GetChildObjects<Button>(parentPanel, "button1");
三、通过名称查找某子控件:
    public T GetChildObject<T>(DependencyObject obj, string name) where T : FrameworkElement
    {
    DependencyObject child = null;
    T grandChild = null;
    for (int i = 0; i <= VisualTreeHelper.GetChildrenCount(obj) - 1; i++)
    {
        child = VisualTreeHelper.GetChild(obj, i);
    if (child is T && (((T)child).Name == name | string.IsNullOrEmpty(name)))
        {
    return (T)child;
        }
    else
        {
            grandChild = GetChildObject<T>(child, name);
    if (grandChild != null)
    return grandChild;
            }
        }
    return null;
    }
调用:
    StackPanel sp = GetChildObject<StackPanel>(this.LayoutRoot, "spDemoPanel");
四、通过名称查找父控件
    public T GetParentObject<T>(DependencyObject obj, string name) where T : FrameworkElement
    {
        DependencyObject parent = VisualTreeHelper.GetParent(obj);
       
    while (parent != null)
        {
    if (parent is T && (((T)parent).Name == name | string.IsNullOrEmpty(name)))
            {
    return (T)parent;
            }
       
            parent = VisualTreeHelper.GetParent(parent);
        }
       
    return null;
    }
调用:
    Grid layoutGrid = VTHelper.GetParentObject<Grid>(this.spDemoPanel, "LayoutRoot");


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