PieSeriesDataAdapter.ValueDataMember Property

Gets or sets the name of the data field that contains series point values.

Namespace: DevExpress.XamarinForms.Charts

Assembly: DevExpress.XamarinForms.Charts.dll

NuGet Package: DevExpress.XamarinForms.Charts

Declaration

public string ValueDataMember { get; set; }

Property Value

Type	Description
String	The name of the data field that contains series point values.

Example

This example shows how to provide data for the PieSeries.

Note

If you want to provide data for the ChartView, use the SeriesDataAdapter class.

Set the PieSeries.Data property to a new PieSeriesDataAdapter instance. Use the DataSource, ValueDataMember, and LabelDataMember properties to specify the data source for the chart, and to define data source members used to generate series points and labels.

C#

using System.Collections.Generic;
using Xamarin.Forms;
// ...

class ViewModel {
    public IReadOnlyList<LandAreaItem> LandAreas { get; }

    public ViewModel() {
        LandAreas = new List<LandAreaItem>() {
            new LandAreaItem("Russia", 17.098),
            new LandAreaItem("Canada", 9.985),
            new LandAreaItem("People's Republic of China", 9.597),
            new LandAreaItem("United States of America", 9.834),
            new LandAreaItem("Brazil", 8.516),
            new LandAreaItem("Australia", 7.692),
            new LandAreaItem("India", 3.287),
            new LandAreaItem("Others", 81.2)
        };
    }
}

class LandAreaItem {
    public string CountryName { get; }
    public double Area { get; }

    public LandAreaItem(string countryName, double area) {
        this.CountryName = countryName;
        this.Area = area;
    }
}

XAML

<dxc:PieChartView>
    <dxc:PieChartView.BindingContext>
        <local:ViewModel/>
    </dxc:PieChartView.BindingContext>
    <dxc:PieChartView.Series>
        <dxc:PieSeries>
            <dxc:PieSeries.Data>
                <dxc:PieSeriesDataAdapter DataSource="{Binding LandAreas}" 
                                          LabelDataMember="CountryName" 
                                          ValueDataMember="Area"/>
            </dxc:PieSeries.Data>
        </dxc:PieSeries>
    </dxc:PieChartView.Series>
</dxc:PieChartView>