DxPolarChartBarSeries<T, TArgument, TValue> Class

Defines a bar series.

Assembly: DevExpress.Blazor.v25.1.dll

Declaration

public class DxPolarChartBarSeries<T, TArgument, TValue> :
    DxPolarChartBaseSeries<T, TArgument, TValue>

Type Parameters

Name	Description
T	The data type.
TArgument	The series argument type.
TValue	The series value type.

Remarks

The bar series displays data as a collection of bars.

Bar width is specified

Run Demo: Polar and Radar - Discrete Data

Declare a Bar Series

Use the Polar Chart’s Data property to specify a data source.
Add a <DxPolarChartBarSeries> tag to the component’s markup.
Assign data source fields that contain arguments and values for data points to ArgumentField and ValueField properties.
Optional. Configure the series: customize appearance, add labels, choose selection and hover modes, etc.

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

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;
        }
    }
}

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),
            };
        }
    }

Nested Component Structure

You can add the following child components to a bar series:

DxChartSeriesLabel: Defines a series label.
DxChartSeriesLegendItem: Defines an item that indicates a series in the legend.
DxChartSeriesPoint: Contains settings for points of the chart’s line- and area-based series.

Note that the Polar Chart treats individual bars as points. If you specify the same property at both series and series point levels, the latter has a higher priority.

The following code snippet declares these objects in the markup:

@using System.Drawing

<DxPolarChart Data=@DataSource>
    <DxChartLegend Position="RelativePosition.Outside" />
    <DxPolarChartBarSeries ArgumentField="@((DiscretePoint i) => i.Arg)"
                           ValueField="@((DiscretePoint i) => i.Day)" 
                           Color="Color.Lavender">
        <DxChartSeriesLegendItem Text="Daily Temperature" />
        <DxChartSeriesLabel Visible="true" FormatPattern="{value:##.#}" />
        <DxChartSeriesPoint Color="Color.Blue" />
    </DxPolarChartBarSeries>
</DxPolarChart>

Nested components

Customize Appearance

The Polar Chart allows you to use the following options to customize a bar series:

BarPadding: Specifies the padding between bars in a bar group, as a percentage.
BarWidth: Specifies the width of an individual bar in the series, in pixels.
BreakOnEmptyPoints: Specifies whether the series should break on points with null values.
Color: Specifies the color of the series.
MinBarHeight: Specifies the minimum bar height, in pixels.

Custom series appearance

@using System.Drawing

<DxPolarChart Data=@DataSource>
    <DxPolarChartBarSeries ArgumentField="@((DiscretePoint i) => i.Arg)"
                           ValueField="@((DiscretePoint i) => i.Day)"
                           BarPadding="0.4"
                           Color="Color.Lavender">
    </DxPolarChartBarSeries>
</DxPolarChart>

User Interaction Options

Users can select and hover the mouse pointer over a series and its elements. The table below describes available user interaction options. Since the Polar Chart component treats individual bars as points, the SeriesSelectionMode property is not applicable to a bar series.