How to customize the axis grid line for .NET MAUI Chart?

This article explains how to customize the axis grid line in the .NET MAUI Chart.
The .NET MAUI Chart allows customization using properties such as MajorGridLineStyle, MinorGridLineStyle, MajorTickStyle and MinorTickStyle for changing the width, style (such as dashes), and color of grid lines.
The visibility of the major gridlines can be controlled using the ShowMajorGridLines property. The default value of ShowMajorGridLines is true.

Step 1: Customize the appearance of major gridlines using the MajorGridLineStyle property in the ChartAxis.

[XAML]

<chart:SfCartesianChart>
    ...
    <chart:SfCartesianChart.YAxes>
        <chart:NumericalAxis ShowMajorGridLines="True">
            <chart:NumericalAxis.MajorGridLineStyle>
                <chart:ChartLineStyle Stroke="Blue" StrokeWidth="2"/>
            </chart:NumericalAxis.MajorGridLineStyle>
        </chart:NumericalAxis>
    </chart:SfCartesianChart.YAxes>
    ...
</chart:SfCartesianChart>

[C#]

SfCartesianChart chart = new SfCartesianChart();
    . . .
NumericalAxis secondaryAxis = new NumericalAxis();
secondaryAxis.ShowMajorGridLines = true;
ChartLineStyle axisLineStyle = new ChartLineStyle();
axisLineStyle.Stroke = Colors.Blue;
axisLineStyle.StrokeWidth = 2;
secondaryAxis.MajorGridLineStyle = axisLineStyle;
chart.YAxes.Add(secondaryAxis);

Step 2: Set the minor gridlines style to a dashed pattern using the StrokeDashArray property.
[XAML]

<chart:SfCartesianChart>
    <chart:SfCartesianChart.Resources>
        <DoubleCollection x:Key="dashArray">
            <x:Double>3</x:Double>
            <x:Double>3</x:Double>
        </DoubleCollection>
    </chart:SfCartesianChart.Resources>
    ...
    <chart:SfCartesianChart.YAxes>
        <chart:NumericalAxis ShowMinorGridLines="True" MinorTicksPerInterval="2">
            <chart:NumericalAxis.MinorGridLineStyle>
                <chart:ChartLineStyle Stroke="Green" StrokeWidth="1" StrokeDashArray="{StaticResource dashArray}"/>
            </chart:NumericalAxis.MinorGridLineStyle>
        </chart:NumericalAxis>
    </chart:SfCartesianChart.YAxes>
    ...
</chart:SfCartesianChart>

[C#]

SfCartesianChart chart = new SfCartesianChart();
    . . .
DoubleCollection doubleCollection = new DoubleCollection();
doubleCollection.Add(3);
doubleCollection.Add(3);
NumericalAxis secondaryAxis = new NumericalAxis();
secondaryAxis.ShowMinorGridLines = true;
secondaryAxis.MinorTicksPerInterval = 2;
ChartLineStyle axisLineStyle = new ChartLineStyle();
axisLineStyle.Stroke = Colors.Green;
axisLineStyle.StrokeWidth = 1;
axisLineStyle.StrokeDashArray = doubleCollection;
secondaryAxis.MinorGridLineStyle = axisLineStyle;
chart.YAxes.Add(secondaryAxis);

Output

Download the complete sample from GitHub.

Conclusion
I hope you enjoyed learning how to customize the axis grid line for .NET MAUI Chart (SfCartesianChart).
You can refer to our .NET MAUI Chart feature tour page to know about its other groundbreaking feature representations. Explore our .NET MAUI Chart documentation to understand how to present and manipulate data.
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