19.搭建Wpf框架(18) ——DataGrid实现右冻结 先上效果图：
其中，Field3和Field4为右冻结列。
将一下大致思路，
1.在DataGrid右边再放一个DataGrid，用来显示右冻结的列，把冻结的列从左边的DataGrid移除。 2.然后左边的DataGrid右侧的滚动条隐藏，横向滚动条显示，右边的DataDataGrid右侧的滚动条显示，横向滚动条显示，代码如下：
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<ScrollViewer x:Name="PART_ScrollViewer"
Focusable="false">
...
</ScrollViewer>
<controls:DataGridScrollView x:Name="PART_Right" Grid.Column="1" Visibility="Collapsed"
ItemsSource="{TemplateBinding ItemsSource}"
AutoGenerateColumns="{TemplateBinding AutoGenerateColumns}"
CanUserSortColumns="False"
CanUserAddRows="False"
IsReadOnly="True"
Style="{StaticResource AIStudio.Styles.DataGrid}"
ScrollViewer.HorizontalScrollBarVisibility="Disabled"
ScrollViewer.VerticalScrollBarVisibility="{Binding ElementName=PART_ScrollViewer,Path=ComputedVerticalScrollBarVisibility}"/>
</Grid>
3.然后是两个DataGrid的ScrollViewer的同步滚动和选中项互相同步的问题，在CS中实现，代码如下：
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
if (_scrollViewer != null)
{
_scrollViewer.ScrollChanged -= ScrollViewer_ScrollChanged;
}
if (_rightScrollViewer != null)
{
_rightScrollViewer.ScrollChanged -= _rightScrollViewer_ScrollChanged;
}
if (_rightDataGrid != null)
{
_rightDataGrid.ScrollViewerChanged -= ScrollViewerChanged;
_rightDataGrid.SelectionChanged -= _rightDataGrid_SelectionChanged;
}
_scrollViewer = GetTemplateChild(PART_ScrollViewer) as ScrollViewer;
if (_scrollViewer != null)
{
_scrollViewer.ScrollChanged += ScrollViewer_ScrollChanged;
}
_rightDataGrid = GetTemplateChild(PART_Right) as DataGridScrollView;
if (_rightDataGrid != null)
{
_rightDataGrid.ScrollViewerChanged += ScrollViewerChanged;
_rightDataGrid.SelectionChanged += _rightDataGrid_SelectionChanged;
}
this.SelectionChanged += DataGridRightFrozen_SelectionChanged;
}
private void ScrollViewerChanged(ScrollViewer viewer)
{
_rightScrollViewer = viewer;
_rightScrollViewer.ScrollChanged += _rightScrollViewer_ScrollChanged;
}
private void ScrollViewer_ScrollChanged(object sender, ScrollChangedEventArgs e)
{
if (_rightScrollViewer != null)
{
_rightScrollViewer.ScrollToVerticalOffset(_scrollViewer.VerticalOffset);
}
}
private void _rightScrollViewer_ScrollChanged(object sender, ScrollChangedEventArgs e)
{
if (_scrollViewer != null)
{
_scrollViewer.ScrollToVerticalOffset(_rightScrollViewer.VerticalOffset);
}
}
private void _rightDataGrid_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
this.SetCurrentValue(SelectedItemProperty, _rightDataGrid.SelectedItem);
}
private void DataGridRightFrozen_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
_rightDataGrid.SetCurrentValue(SelectedItemProperty, SelectedItem);
}
大致就是这样
最后老规矩，上源码地址：
https://gitee.com/akwkevin/AI-wpf-controls
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