效果

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：

 

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);}