Because rows are virtualized, meaning that they only exist when they are in a grid's viewport, references to them, or one of their cells, should not be kept.
Fixed Columns vs. Templates
In order to support fixed columns when creating a new row template for a table-view layout, the following criteria must be met:
The PART_CellsHost template part must be a FixedCellPanel.
If a new template is provided for a DataGridControl and fixed columns are to be supported, it is essential that a TableViewScrollViewer be used. This scroll viewer is responsible for preserving the TranslateTransforms that fix and scroll elements, as well as executing the PageLeft and PageRight actions according to the reduced viewport. It is also recommended that an AdornerDecorator be located above the TableViewScrollViewer of the templated DataGridControl to support drag and dropping of the fixed-column splitter correctly.
Example
All examples in this topic assume that the grid is bound to the Orders table of the Northwind database, unless stated otherwise.
The following example demonstrates how to recreate the default card-view header, which contains a ColumnManagerRow to the right of a GroupByControl.The following example demonstrates how to force the GroupByControl and ColumnManagerRow contained in a grid's fixed header section to occupy all the available width.
By default, items in the fixed header and footer sections will only span across the width occupied by the columns.
<Gridxmlns:xcdg="http://schemas.xceed.com/wpf/xaml/datagrid"><Grid.Resources><xcdg:DataGridCollectionViewSourcex:Key="cvs_orders"Source="{Binding Source={x:Static Application.Current},
Path=Orders}"/></Grid.Resources><xcdg:DataGridControlx:Name="OrdersGrid"ItemsSource="{Binding Source={StaticResource cvs_orders}}"><xcdg:DataGridControl.View><xcdg:CardViewUseDefaultHeadersFooters="False"><xcdg:CardView.FixedHeaders><DataTemplate><DockPanel><!-- OneWay binding is used because we want the ColumnManagerRow's height to
follow what is defined by the GroupByControl. A FallbackValue
is specified so the initial measure pass has an acceptable minimal
value.--><xcdg:ColumnManagerRowDockPanel.Dock="Right"Height="{Binding ElementName=groupByControl,
Path=ActualHeight,
Mode=OneWay,
FallbackValue=60}"/><xcdg:GroupByControlx:Name="groupByControl"/></DockPanel></DataTemplate></xcdg:CardView.FixedHeaders></xcdg:CardView></xcdg:DataGridControl.View></xcdg:DataGridControl></Grid>
Target Platforms: Windows 11, Windows 10, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2