Skip to main content

DevExpress v24.2 Update — Your Feedback Matters

Our What's New in v24.2 webpage includes product-specific surveys. Your response to our survey questions will help us measure product satisfaction for features released in this major update and help us refine our plans for our next major release.

Take the survey Not interested

TreeMapHierarchicalDataAdapter Class

A data adapter that allows you to provide hierarchical data to the Tree Map.

Namespace: DevExpress.Xpf.TreeMap

Assembly: DevExpress.Xpf.TreeMap.v24.2.dll

NuGet Package: DevExpress.Wpf.TreeMap

#Declaration

public class TreeMapHierarchicalDataAdapter :
    TreeMapDataAdapterBase,
    ISupportNativeSource,
    INativeItemsCollector

#Remarks

This class introduces the TreeMapHierarchicalDataAdapter.DataSource property allowing you to specify the data source provided to the Tree Map and the TreeMapHierarchicalDataAdapter.ValueDataMember property that allows you to specify which data member is used as a value provider.

#Example

To provide hierarchical data to the Tree Map, do the following.

<Window.Resources>
    <HierarchicalDataTemplate 
        DataType="{x:Type local:SideOfWorld}"
        ItemsSource="{Binding Countries}">
        <TextBlock 
            Margin="4,4,4,-3"
            Padding="4,2,0,2"
            Text="{Binding Name}"
            Foreground="White"
            Background="Gray"/>
    </HierarchicalDataTemplate>
    <DataTemplate
        DataType="{x:Type local:Country}">
        <Grid>
            <TextBlock 
                Padding="4,2,0,0"
                Text="{Binding Name}" 
                TextWrapping="WrapWithOverflow" 
                TextTrimming="WordEllipsis"/>
            <Border 
                BorderThickness="1" 
                BorderBrush="#60000000"/>
        </Grid>
    </DataTemplate>
</Window.Resources>

<Grid>
    <dxtm:TreeMapControl>
        <dxtm:TreeMapControl.Colorizer>
            <dxtm:TreeMapPaletteColorizer>
                <dxtm:Office2013Palette/>
            </dxtm:TreeMapPaletteColorizer>
        </dxtm:TreeMapControl.Colorizer>
        <dxtm:TreeMapHierarchicalDataAdapter
            DataSource="{Binding}"
            ValueDataMember="Gdp">
        </dxtm:TreeMapHierarchicalDataAdapter>
    </dxtm:TreeMapControl>
</Grid>
See Also