WPF DataGrid: how do I stop auto scrolling when a cell is clicked?
Define an EventSetter in the DataGrid.RowStyle to call a handler that prevents the row from being brought into view:
XAML
<DataGrid> <DataGrid.RowStyle> <Style TargetType="{x:Type DataGridRow}"> <EventSetter Event="Control.RequestBringIntoView" Handler="DataGrid_Documents_RequestBringIntoView" /> </Style> </DataGrid.RowStyle></DataGrid>Handler
private void DataGrid_Documents_RequestBringIntoView(object sender, RequestBringIntoViewEventArgs e){ e.Handled = true; }
I took more time to have a look at this problem as my first solution wasn't working.
However the answer of John is almost the good one. The trick is to catch the RequestBringIntoView event BEFORE it gets to the ScrollViewer in order to mark it has handled.
If you don't have to refine the whole template, you can use the following code:
var scp = TreeHelper.FindVisualChild<ScrollContentPresenter>(this.datagrid);scp.RequestBringIntoView += (s, e) => e.Handled = true;We use the ScrollContentPresenter because it's just below the ScrollViewer in the visual tree.
Hope this helps !
You can access the DataGrid's internal ScrollViewer by modifying the template. Although normally you wouldn't put an event handler to code behind in a template, if you declare the template inline you can treat the event handler the same way you are when you attach it to the DataGrid itself. This is the default template as generated from Blend including an added handler on the ScrollViewer for the RequestBringIntoView event:
<ControlTemplate TargetType="{x:Type Controls:DataGrid}"><Border SnapsToDevicePixels="True" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}"> <ScrollViewer x:Name="DG_ScrollViewer" Focusable="False" RequestBringIntoView="DG_ScrollViewer_RequestBringIntoView"> <ScrollViewer.Template> <ControlTemplate TargetType="{x:Type ScrollViewer}"> <Grid> <Grid.RowDefinitions> <RowDefinition Height="Auto"/> <RowDefinition Height="*"/> <RowDefinition Height="Auto"/> </Grid.RowDefinitions> <Grid.ColumnDefinitions> <ColumnDefinition Width="Auto"/> <ColumnDefinition Width="*"/> <ColumnDefinition Width="Auto"/> </Grid.ColumnDefinitions> <Button Width="{Binding CellsPanelHorizontalOffset, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type Controls:DataGrid}}}" Focusable="False"> <Button.Visibility> <Binding Path="HeadersVisibility" RelativeSource="{RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type Controls:DataGrid}}"> <Binding.ConverterParameter> <Controls:DataGridHeadersVisibility>All</Controls:DataGridHeadersVisibility> </Binding.ConverterParameter> </Binding> </Button.Visibility> <Button.Template> <ControlTemplate TargetType="{x:Type Button}"> <Grid> <Rectangle x:Name="Border" Fill="{DynamicResource {x:Static SystemColors.ControlBrushKey}}" SnapsToDevicePixels="True"/> <Polygon x:Name="Arrow" Fill="Black" Stretch="Uniform" HorizontalAlignment="Right" Margin="8,8,3,3" VerticalAlignment="Bottom" Opacity="0.15" Points="0,10 10,10 10,0"/> </Grid> <ControlTemplate.Triggers> <Trigger Property="IsMouseOver" Value="True"> <Setter Property="Stroke" TargetName="Border" Value="{DynamicResource {x:Static SystemColors.ControlDarkBrushKey}}"/> </Trigger> <Trigger Property="IsPressed" Value="True"> <Setter Property="Fill" TargetName="Border" Value="{DynamicResource {x:Static SystemColors.ControlDarkBrushKey}}"/> </Trigger> <Trigger Property="IsEnabled" Value="False"> <Setter Property="Visibility" TargetName="Arrow" Value="Collapsed"/> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Button.Template> <Button.Command> <RoutedCommand/> </Button.Command> </Button> <Custom:DataGridColumnHeadersPresenter x:Name="PART_ColumnHeadersPresenter" Grid.Column="1"> <Custom:DataGridColumnHeadersPresenter.Visibility> <Binding Path="HeadersVisibility" RelativeSource="{RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type Controls:DataGrid}}"> <Binding.ConverterParameter> <Controls:DataGridHeadersVisibility>Column</Controls:DataGridHeadersVisibility> </Binding.ConverterParameter> </Binding> </Custom:DataGridColumnHeadersPresenter.Visibility> </Custom:DataGridColumnHeadersPresenter> <ScrollContentPresenter x:Name="PART_ScrollContentPresenter" Grid.ColumnSpan="2" Grid.Row="1" Content="{TemplateBinding Content}" ContentStringFormat="{TemplateBinding ContentStringFormat}" ContentTemplate="{TemplateBinding ContentTemplate}" CanContentScroll="{TemplateBinding CanContentScroll}" CanHorizontallyScroll="False" CanVerticallyScroll="False"/> <ScrollBar x:Name="PART_VerticalScrollBar" Visibility="{TemplateBinding ComputedVerticalScrollBarVisibility}" Grid.Column="2" Grid.Row="1" Maximum="{TemplateBinding ScrollableHeight}" Value="{Binding VerticalOffset, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}" Orientation="Vertical" ViewportSize="{TemplateBinding ViewportHeight}"/> <Grid Grid.Column="1" Grid.Row="2"> <Grid.ColumnDefinitions> <ColumnDefinition Width="{Binding NonFrozenColumnsViewportHorizontalOffset, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type Controls:DataGrid}}}"/> <ColumnDefinition Width="*"/> </Grid.ColumnDefinitions> <ScrollBar x:Name="PART_HorizontalScrollBar" Visibility="{TemplateBinding ComputedHorizontalScrollBarVisibility}" Grid.Column="1" Maximum="{TemplateBinding ScrollableWidth}" Value="{Binding HorizontalOffset, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}" Orientation="Horizontal" ViewportSize="{TemplateBinding ViewportWidth}"/> </Grid> </Grid> </ControlTemplate> </ScrollViewer.Template> <ItemsPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/> </ScrollViewer></Border>