DxPolarChartBaseSeries<T, TArgument, TValue>.ValueField Property

Specifies a data source field that contains values for series points.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v25.1.dll

NuGet Package: DevExpress.Blazor

Declaration

[Parameter]
public Expression<Func<T, TValue>> ValueField { get; set; }

Property Value

Type	Description
Expression<Func<T, TValue>>	The field name.

Remarks

Use the Data property to bind the Polar Chart to a data source. Assign data source fields that contain arguments and values for data points to ArgumentField and ValueField properties.

The following example specifies the Arg field as the argument source and the Day field as the value source:

Razor

<DxPolarChart Data=@DataSource>
    <DxPolarChartAreaSeries ArgumentField="@((DiscretePoint i) => i.Arg)"
                            ValueField="@((DiscretePoint i) => i.Day)">
    </DxPolarChartAreaSeries>
    <DxChartLegend Visible="false" />
</DxPolarChart>

DiscretePoint.cs

namespace BlazorDemo.Data {
    public class DiscretePoint {
        public string Arg { get; set; }
        public int Day { get; set; }
        public int Night { get; set; }


        public DiscretePoint(string arg, int day, int night) {
            Arg = arg;
            Day = day;
            Night = night;
        }
    }
}

ChartDiscreteDataProvider.cs

using System.Collections.Generic;
using BlazorDemo.Data;

// ...
    public class ChartDiscreteDataProvider : IChartDiscreteDataProvider {
        public List<DiscretePoint> GenerateData() {
            return new List<DiscretePoint>() {
                new DiscretePoint("January", 6, 2),
                new DiscretePoint("February", 7, 2),
                new DiscretePoint("March", 10, 3),
                new DiscretePoint("April", 14, 5),
                new DiscretePoint("May", 18, 8),
                new DiscretePoint("June", 21, 11),
                new DiscretePoint("July", 22, 13),
                new DiscretePoint("August", 22, 13),
                new DiscretePoint("September", 19, 11),
                new DiscretePoint("October", 15, 8),
                new DiscretePoint("November", 10, 5),
                new DiscretePoint("December", 7, 3),
            };
        }
    }