WPF 在WPF中寻找某控件特定类型的子控件

private T FindVisualChild<T>(DependencyObject depObj) where T : DependencyObject
{
    if (depObj == null)
    {
        return null;
    }

    for (int i = 0; i < VisualTreeHelper.GetChildrenCount(depObj); i++)
    {
        DependencyObject child = VisualTreeHelper.GetChild(depObj, i);
        if (child is T)
        {
            return (T)child;
        }

        T childItem = FindVisualChild<T>(child);
        if (childItem != null)
        {
            return childItem;
        }
    }
    return null;
}

寻找depObj控件的T类型的子控件

例如：

System.Windows.Controls.ListView listView = FindVisualChild<System.Windows.Controls.ListView>(scrollViewer);