Appearance in WinUI Chart (SfPolarChart)

2 Jan 202510 minutes to read

The appearance of the SfPolarChart can be customized by using the predefined palettes, custom palettes, and gradient which allows enriching the application.

Default PaletteBrushes

Currently, the SfPolarChart supports only one predefined PaletteBrushes and it is the default brushes for the SfPolarChart. The following screenshot shows the default appearance of multiple series.

XAML

<chart:SfPolarChart x:Name="chart"
                    GridLineType="Polygon">
        ...
        <chart:SfPolarChart.Series>
            <chart:PolarLineSeries
			ItemsSource="{Binding PlantDetails}" 
                        XBindingPath="Direction"
                        YBindingPath="Tree" Label="Tree">
            </chart:PolarLineSeries>

            <chart:PolarLineSeries
			ItemsSource="{Binding PlantDetails}" 
                        XBindingPath="Direction"
                        YBindingPath="Weed" Label="Weed">
            </chart:PolarLineSeries>

            <chart:PolarLineSeries
			ItemsSource="{Binding PlantDetails}" 
                        XBindingPath="Direction"
                        YBindingPath="Flower" Label="Flower">
            </chart:PolarLineSeries>
        </chart:SfPolarChart.Series>
        ...
</chart:SfPolarChart>

C#

SfPolarChart chart = new SfPolarChart();
chart.GridLineType = PolarChartGridLineType.Polygon;
...
PolarLineSeries series1 = new PolarLineSeries();
series1.XBindingPath = "Direction";
series1.YBindingPath = "Tree";
series1.ItemsSource = viewModel.PlantDetails;

PolarLineSeries series2 = new PolarLineSeries();
series2.XBindingPath = "Direction";
series2.YBindingPath = "Weed";
series2.ItemsSource = viewModel.PlantDetails;

PolarLineSeries series3 = new PolarLineSeries();
series3.XBindingPath = "Direction";
series3.YBindingPath = "Flower";
series3.ItemsSource = viewModel.PlantDetails;
...
this.Content = chart;

Custom PaletteBrushes

The SfPolarChart provides support to define own brushes for the chart with preferred order by using the PaletteBrushes property, as shown in the following code example.

XAML

<Grid>
    <Grid.Resources>
        <BrushCollection x:Key="customBrushes">
                <SolidColorBrush Color="#4dd0e1"/>
                <SolidColorBrush Color="#26c6da"/>
                <SolidColorBrush Color="#00bcd4"/>
                <SolidColorBrush Color="#00acc1"/>
                <SolidColorBrush Color="#0097a7"/>
                <SolidColorBrush Color="#00838f"/>
        </BrushCollection>
    </Grid.Resources>
    <chart:SfPolarChart x:Name="chart"
                        PaletteBrushes="{StaticResource customBrushes}" >
. . .
</chart:SfPolarChart>
</Grid>

C#

SfPolarChart chart = new SfPolarChart();
...
List<Brush> customBrushes = new List<Brush>();
customBrushes.Add(new SolidColorBrush(Color.FromArgb(255, 77, 208, 225)));
customBrushes.Add(new SolidColorBrush(Color.FromArgb(255, 38, 198, 218)));
customBrushes.Add(new SolidColorBrush(Color.FromArgb(255, 0, 188, 212)));
customBrushes.Add(new SolidColorBrush(Color.FromArgb(255, 0, 172, 193)));
customBrushes.Add(new SolidColorBrush(Color.FromArgb(255, 0, 151, 167)));
customBrushes.Add(new SolidColorBrush(Color.FromArgb(255, 0, 131, 143)));

chart.PaletteBrushes = customBrushes;
. . .            
this.Content = chart;

Applying Gradient

Gradient for the polar chart can be set by using the PaletteBrushes property of the funnel chart with the help of the LinearGradientBrush or RadialGradientBrush.

XAML

<Grid>
    <Grid.Resources>
        <BrushCollection x:Key="customBrushes">
                <LinearGradientBrush>
                    <GradientStop Offset="1" Color="#FFE7C7" />
                    <GradientStop Offset="0" Color="#FCB69F" />
                </LinearGradientBrush>
                <LinearGradientBrush>
                    <GradientStop Offset="1" Color="#fadd7d" />
                    <GradientStop Offset="0" Color="#fccc2d" />
                </LinearGradientBrush>
                <LinearGradientBrush>
                    <GradientStop Offset="1" Color="#DCFA97" />
                    <GradientStop Offset="0" Color="#96E6A1" />
                </LinearGradientBrush>
        </BrushCollection>
    </Grid.Resources>
    <chart:SfPolarChart x:Name="chart" 
                        PaletteBrushes="{StaticResource customBrushes}">
. . .
</chart:SfPolarChart>
</Grid>

C#

SfPolarChart chart = new SfPolarChart();
...
List<Brush> customBrushes = new List<Brush>();
LinearGradientBrush gradientColor1 = new LinearGradientBrush();
GradientStop stop1 = new GradientStop() { Offset = 1, Color = Color.FromArgb(255, 255, 231, 199) };
GradientStop stop2 = new GradientStop() { Offset = 0, Color = Color.FromArgb(255, 252, 182, 159) };
gradientColor1.GradientStops.Add(stop1);
gradientColor1.GradientStops.Add(stop2);
LinearGradientBrush gradientColor2 = new LinearGradientBrush();
stop1 = new GradientStop() { Offset = 1, Color = Color.FromArgb(255, 250, 221, 125) };
stop2 = new GradientStop() { Offset = 0, Color = Color.FromArgb(255, 252, 204, 45) };

gradientColor2.GradientStops.Add(stop1);
gradientColor2.GradientStops.Add(stop2);

customBrushes.Add(gradientColor1);
customBrushes.Add(gradientColor2);

chart.PaletteBrushes = customBrushes;
. . .

Gradient color using the Fill property of series with LinearGradientBrush.

XAML

<chart:SfPolarChart>
    ...
    <chart:PolarAreaSeries  ItemsSource="{Binding PlantDetails}" 
                            XBindingPath="Direction" 
                            YBindingPath="Tree" Label="Tree">

        <chart:PolarAreaSeries.Fill>
            <LinearGradientBrush>
                <GradientStop Offset="1" Color="#A8EAEE" />
                <GradientStop Offset="0" Color="#7BB0F9" />
            </LinearGradientBrush>
        </chart:PolarAreaSeries.Fill>
                   
    </chart:PolarAreaSeries>
...
</chart:SfPolarChart>

C#

SfPolarChart chart = new SfPolarChart();
. . .
LinearGradientBrush gradientColor = new LinearGradientBrush();
GradientStop stop1 = new GradientStop() { Offset = 1, Color = Color.FromArgb(255, 168, 234, 238) };
GradientStop stop2 = new GradientStop() { Offset = 0, Color = Color.FromArgb(255, 123, 176, 249) };
gradientColor.GradientStops.Add(stop1);
gradientColor.GradientStops.Add(stop2);

PolarAreaSeries series = new PolarAreaSeries();
series.Fill = gradientColor;
...