ChartDataSourceAdapter.ItemIdDataMember Property

Gets or sets the name of the data field that contains the ID values of chart items.

Namespace: DevExpress.Xpf.Map

Assembly: DevExpress.Xpf.Map.v18.2.dll

Declaration

C#

public string ItemIdDataMember { get; set; }

VB.NET

Public Property ItemIdDataMember As String

Property Value

Type	Description
String	A String value that specifies the data field name.

Example

The ChartDataSourceAdapter class contains the following parameters that can be customized.

• ChartDataSourceAdapter.ItemMinSize - allows specifying an items’ minimum size;
• ChartDataSourceAdapter.ItemMaxSize - allows specifying an items’ maximum size;
• ChartDataSourceAdapter.MeasureRules - allows specifying measure rules used to calculate the size of chart items;
• ChartDataSourceAdapter.SummaryFunction - allows specifying the type of a summary function used to estimate the value of chart items.

Note

A complete sample project is available at https://github.com/DevExpress-Examples/how-to-customize-chart-data-source-adapter-parameters-t209508.

MainWindow.xaml

<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:sys="clr-namespace:System;assembly=mscorlib"
        xmlns:dxm="http://schemas.devexpress.com/winfx/2008/xaml/map"
        x:Class="BubbleChartDataAdapter.MainWindow"
        Title="MainWindow" Height="480" Width="640">
    <Window.Resources>
        <ObjectDataProvider x:Key="SummaryFunctions"
                            ObjectType="{x:Type sys:Enum}" MethodName="GetValues">
            <ObjectDataProvider.MethodParameters>
                <x:Type TypeName="dxm:SummaryFunction"/>
            </ObjectDataProvider.MethodParameters>
        </ObjectDataProvider>
        <XmlDataProvider x:Key="dataSet" Source="SummaryExample.xml" XPath="/dataSet" />
    </Window.Resources>

    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="3*"/>
            <ColumnDefinition Width="*"/>
        </Grid.ColumnDefinitions>
        <dxm:MapControl Grid.Column="0">
            <dxm:VectorLayer ToolTipEnabled="True" 
                             ToolTipPattern="Summary Function Result: %V%">
                <dxm:BubbleChartDataAdapter 
                    x:Name="adapter" ItemMinSize="10" ItemMaxSize="60" 
                    DataSource="{Binding Source={StaticResource dataSet}, XPath=data}"
                    SummaryFunction="{Binding ElementName=lbSummaryFunction, Path=SelectedValue}" ItemIdDataMember="id">
                    <dxm:BubbleChartDataAdapter.Mappings>
                        <dxm:MapBubbleMappingInfo Latitude="lat" Longitude="lon" Value="value"/>
                    </dxm:BubbleChartDataAdapter.Mappings>
                    <dxm:BubbleChartDataAdapter.MeasureRules>
                        <dxm:MeasureRules RangeStops="1 2 3 4 5 6 7 8 9 10"/>
                    </dxm:BubbleChartDataAdapter.MeasureRules>
                </dxm:BubbleChartDataAdapter>
            </dxm:VectorLayer>            
        </dxm:MapControl>
        <StackPanel Grid.Column="1" >
            <Label>Summary Function:</Label>
        <ListBox x:Name="lbSummaryFunction" Margin="4"  SelectedIndex="0"
                 ItemsSource="{Binding Source={StaticResource SummaryFunctions}}"/>
        </StackPanel>
    </Grid>
</Window>

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the ItemIdDataMember property.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

customize-appearance-of-generated-pie-chart-items-t183429/VB/Wpf_MapControl_PieChartDataAdapter/MainWindow.xaml#L54

<dxm:PieChartDataAdapter DataSource="{Binding Source={StaticResource dataSource}, XPath=Table1}"
                         ItemIdDataMember="Country" ItemMaxSize="60" ItemMinSize="10">
    <dxm:PieChartDataAdapter.Mappings>

wpf-mapcontrol-getting-started-lesson-3-add-analytical-data-to-a-geographical-map-t177876/VB/Wpf_MapControl_Lesson3/MainWindow.xaml#L31

<dxm:PieChartDataAdapter DataSource="{Binding Source={StaticResource dataProvider}, XPath=Table1}"
                         ItemIdDataMember="Country" ItemMinSize="20" ItemMaxSize="60">
    <dxm:PieChartDataAdapter.MeasureRules>

how-to-customize-chart-data-source-adapter-parameters-t209508/VB/BubbleChartDataAdapter/MainWindow.xaml#L29

DataSource="{Binding Source={StaticResource dataSet}, XPath=data}"
SummaryFunction="{Binding ElementName=lbSummaryFunction, Path=SelectedValue}" ItemIdDataMember="id">
<dxm:BubbleChartDataAdapter.Mappings>

how-to-customize-the-appearance-of-automatically-generated-map-pie-charts-t212908/VB/MapPieSettingsExample/MainWindow.xaml#L60

<dxm:PieChartDataAdapter DataSource="{Binding Source={StaticResource pieData}, XPath=Table1}"
    ItemIdDataMember="Country" ItemMinSize="10" ItemMaxSize="50">
    <dxm:PieChartDataAdapter.Mappings>