Polar Area Chart in .NET MAUI Chart

30 Oct 20246 minutes to read

Polar Area Chart

To display an area series in a polar chart, instantiate the PolarAreaSeries and include it in the Series collection property of SfPolarChart.

<chart:SfPolarChart> 
    <chart:SfPolarChart.PrimaryAxis>
        <chart:CategoryAxis/>
    </chart:SfPolarChart.PrimaryAxis>

    <chart:SfPolarChart.SecondaryAxis>
        <chart:NumericalAxis/>
    </chart:SfPolarChart.SecondaryAxis>   

    <chart:PolarAreaSeries ItemsSource="{Binding PlantDetails}" XBindingPath="Direction" YBindingPath="Tree"/>  
</chart:SfPolarChart>
SfPolarChart chart = new SfPolarChart();

CategoryAxis primaryAxis = new CategoryAxis();
chart.PrimaryAxis = primaryAxis;

NumericalAxis secondaryAxis = new NumericalAxis();
chart.SecondaryAxis = secondaryAxis;

PolarAreaSeries series = new PolarAreaSeries()
{
    ItemsSource = new PlantViewModel().PlantDetails,
    XBindingPath = "Direction",
    YBindingPath = "Tree"
};

chart.Series.Add(series);
this.Content = chart;

Polar area chart type in MAUI Chart

Grid line Type

The GridLineType property used to customize the rendering style of axis grid lines. The default GridLineType is Circle. Switching to the Polygon grid line type transforms the polar chart appearance, resembling a spider, or web chart.

<chart:SfPolarChart GridLineType="Polygon"> 
    . . .
    <chart:PolarAreaSeries ItemsSource="{Binding PlantDetails}" XBindingPath="Direction" YBindingPath="Tree"/>  
</chart:SfPolarChart>
SfPolarChart chart = new SfPolarChart();
chart.GridLineType = PolarChartGridLineType.Polygon;
. . .
PolarAreaSeries series = new PolarAreaSeries()
{
    ItemsSource = new PlantViewModel().PlantDetails,
    XBindingPath = "Direction",
    YBindingPath = "Tree"
};

chart.Series.Add(series);
this.Content = chart;

Polar gridline type in MAUI Chart

Closed Series

The IsClosed property is used to render the series with or without closed path. The default value of IsClosed is true.

<chart:SfPolarChart> 
    . . .
    <chart:PolarAreaSeries ItemsSource="{Binding PlantDetails}" XBindingPath="Direction" YBindingPath="Tree" 
                           IsClosed="False"/>  
</chart:SfPolarChart>
SfPolarChart chart = new SfPolarChart();
. . .
PolarAreaSeries series = new PolarAreaSeries()
{
    ItemsSource = new PlantViewModel().PlantDetails,
    XBindingPath = "Direction",
    YBindingPath = "Tree",
    IsClosed  = false
};

chart.Series.Add(series);
this.Content = chart;

Polar open series in MAUI Chart

Enable Marker

A marker, also known as a symbol, is used to determine or highlight the position of the data point. To enable markers in the series, set the ShowMarkers property to true.

<chart:SfPolarChart>
    ...
    <chart:PolarAreaSeries ItemsSource="{Binding PlantDetails}" XBindingPath="Direction"  YBindingPath="Tree"    
                           ShowMarkers="True"/>
</chart:SfPolarChart>
SfPolarChart chart = new SfPolarChart();
...
PolarAreaSeries series = new PolarAreaSeries()
{
    ItemsSource = new PlantViewModel().PlantDetails,
    XBindingPath = "Direction",
    YBindingPath = "Tree",
    ShowMarkers= true
 };

chart.Series.Add(series);
this.Content= chart;

Marker customization

In order to change the series markers appearance, create an instance of the MarkerSettings property. The following properties are used to customize marker appearance.

  • Type, of type ShapeType, describes the shape of the series marker. The default value of this property is ShapeType.Circle.
  • Stroke, of type Brush, indicates the brush used to paint the marker border.
  • StrokeWidth, of type double, indicates the width of the marker border.
  • Fill, of type Brush, indicates the color of the marker.
  • Width, of type double, indicates the width of the marker.
  • Height, of type double, indicates the height of the marker.
<chart:SfPolarChart>
    ...
    <chart:PolarAreaSeries ItemsSource="{Binding PlantDetails}" XBindingPath="Direction" YBindingPath="Tree"
                           ShowMarkers="True">
        <chart:PolarAreaSeries.MarkerSettings>
            <chart:ChartMarkerSettings Type="Diamond" Fill="Brown" Stroke="Black"
                                       StrokeWidth="1" Height="8" Width="8"/>
        </chart:PolarAreaSeries.MarkerSettings>
    </chart:PolarAreaSeries>
</chart:SfPolarChart>
SfPolarChart chart = new SfPolarChart();
...
ChartMarkerSettings chartMarker = new ChartMarkerSettings()
{
    Type = ShapeType.Diamond,
    Fill = Colors.Brown,
    Stroke = Colors.Black,
    StrokeWidth = 1,
    Height = 8,
    Width = 8
};

PolarAreaSeries series = new PolarAreaSeries()
{
    ItemsSource = new PlantViewModel().PlantDetails,
    XBindingPath = "Direction",
    YBindingPath = "Tree",
    ShowMarkers = true,
    MarkerSettings = chartMarker
};

chart.Series.Add(series);
this.Content = chart;