WPF学习笔记(5):两个DataGrid的滚动条实现同步滚动

效果:两个DataGrid的滚动条实现同步滚动。

 

代码参考了博客园chuncn的文章《.net中同步多个ScrollViewer滚动的四种方法》,原文是针对ListBox的。现改为针对DataGrid,略微作了修改,代码以水平滚动条为例。

原文地址:https://www.cnblogs.com/chuncn/archive/2011/10/08/2202175.html

 

实现方法:

方法一:利用DependencyProperty类的RegisterAttached方法,在属性系统上注册附加属性,并将滚动条属性值HorizontalOffset通过注册属性关联到一个方法。

ScrollViewer sv1, sv2;

private void Window_Loaded(object sender, RoutedEventArgs e)
{
    //分别获取两个DataGrid的ScrollViewer
sv1
= VisualTreeHelper.GetChild(VisualTreeHelper.GetChild(this.DataGrid1, 0), 0) as ScrollViewer; sv2 = VisualTreeHelper.GetChild(VisualTreeHelper.GetChild(this.DataGrid2, 0), 0) as ScrollViewer; //将滚动条属性值HorizontalOffset关联到OnScrollChanged1方法
var offsetChangeListener = DependencyProperty.RegisterAttached("ListenerOffset1", typeof(object), typeof(UserControl), new PropertyMetadata(OnScrollChanged1)); var binding = new Binding("HorizontalOffset") { Source = sv1 }; sv1.SetBinding(offsetChangeListener, binding); offsetChangeListener = DependencyProperty.RegisterAttached("ListenerOffset2", typeof(object), typeof(UserControl), new PropertyMetadata(OnScrollChanged2)); binding = new Binding("HorizontalOffset") { Source = sv2 }; sv2.SetBinding(offsetChangeListener, binding); } public void OnScrollChanged1(DependencyObject sender, DependencyPropertyChangedEventArgs e) { double a = (double)e.NewValue; //获取滚动条位置变化后的属性值 sv2.ScrollToHorizontalOffset(a); } public void OnScrollChanged2(DependencyObject sender, DependencyPropertyChangedEventArgs e) { double a = (double)e.NewValue; sv1.ScrollToHorizontalOffset(a); }

 

方法二:利用滚动条的ScrollChanged事件,同步两个滚动条的位置。

ScrollViewer sv1, sv2;
private void Window_Loaded(object sender, RoutedEventArgs e)
{
    //分别获取两个DataGrid的ScrollViewer
    sv1 = VisualTreeHelper.GetChild(VisualTreeHelper.GetChild(this.DataGrid1, 0), 0) as ScrollViewer;
    sv2 = VisualTreeHelper.GetChild(VisualTreeHelper.GetChild(this.DataGrid2, 0), 0) as ScrollViewer;

    //关联ScrollChanged事件
    sv1.ScrollChanged += new ScrollChangedEventHandler(sv1_ScrollChanged);
    sv2.ScrollChanged += new ScrollChangedEventHandler(sv2_ScrollChanged);
}

void sv1_ScrollChanged(object sender, ScrollChangedEventArgs e)
{
    sv2.ScrollToHorizontalOffset(sv1.HorizontalOffset);
}

void sv2_ScrollChanged(object sender, ScrollChangedEventArgs e)
{
    sv1.ScrollToHorizontalOffset(sv2.HorizontalOffset);
}

 

posted @ 2019-02-11 16:01 向往蓝天的菜鸟 阅读(...) 评论(...) 编辑 收藏