WPF实现两个DataGrid列表的滚动条同步

实现目标:

左右两个DataGrid对比显示,希望拖动一个列表的滚动条,就把别一个列表的滚动条移动到相应位置。

 

主要思路是:

通过FindVisualChildren找到两个DataGrid的ScrollViewer控件,然后注册两个控件的ScrollChanged事件,只要有一个ScrollViewer的VerticalOffset值变了,就相应地修改另一个ScrollViewer的值。

 

示例代码:

var scroll1 = FindVisualChildren<ScrollViewer>(LeftList).First();
var scroll2 = FindVisualChildren<ScrollViewer>(RightList).First();
scroll1.ScrollChanged += (s, e) =>
{
    scroll2.ScrollToVerticalOffset(scroll1.VerticalOffset);
};
scroll2.ScrollChanged += (s, e) =>
{
    scroll1.ScrollToVerticalOffset(scroll2.VerticalOffset);
};

public static IEnumerable<T> FindVisualChildren<T>(DependencyObject depObj) where T : DependencyObject
{
    if (depObj != null)
    {
        for (int i = 0; i < VisualTreeHelper.GetChildrenCount(depObj); i++)
        {
            DependencyObject child = VisualTreeHelper.GetChild(depObj, i);

            if (child != null && child is T chi)
                yield return chi;

            foreach (T childOfChild in FindVisualChildren<T>(child))
                yield return childOfChild;
        }
    }
}

 

posted @ 2023-05-23 17:46  wzwyc  阅读(667)  评论(0编辑  收藏  举报