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Numeric Axis in ASP.NET Core Chart control

03 Aug 2021 / 3 minutes to read

You can use numeric axis to represent numeric values of data in chart. By default, the valueType of an axis is Double.

tagHelper

double.cs

<ejs-chart id="container" width="60%">
        <e-series-collection>
            <e-series dataSource="ViewBag.dataSource" xName="xValue" yName="yValue" name="India" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Line"></e-series>
        </e-series-collection>
    </ejs-chart>

public ActionResult Index()
        {
            List<ChartData> chartData = new List<ChartData>
            {
                new ChartData { xValue = 10, yValue = 21, yValue1 = 28 },
                new ChartData { xValue = 20, yValue = 24, yValue1 = 44 },
                new ChartData { xValue = 30, yValue = 36, yValue1 = 48 },
                new ChartData { xValue = 40, yValue = 38, yValue1 = 50 },
                new ChartData { xValue = 50, yValue = 54, yValue1 = 66 },
                new ChartData { xValue = 60, yValue = 57, yValue1 = 78 },
                new ChartData { xValue = 70, yValue = 70, yValue1 = 84 },
            };
            ViewBag.dataSource = chartData;
            return View();
        }

        public class ChartData
        {
            public double xValue;
            public double yValue;
            public double yValue1;
        }

Range

Range for an axis, will be calculated automatically based on the provided data, you can also customize the range of the axis using minimum, maximum and interval property of the axis.

tagHelper

range.cs

<ejs-chart id="container" width="60%">
        <e-chart-primaryxaxis minimum="10" maximum="80" interval="5"></e-chart-primaryxaxis>
        <e-series-collection>
            <e-series dataSource="ViewBag.dataSource" xName="xValue" yName="yValue" name="India" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Line"></e-series>
        </e-series-collection>
    </ejs-chart>

public ActionResult Index()
        {
            List<ChartData> chartData = new List<ChartData>
            {
                new ChartData { xValue = 10, yValue = 21, yValue1 = 28 },
                new ChartData { xValue = 20, yValue = 24, yValue1 = 44 },
                new ChartData { xValue = 30, yValue = 36, yValue1 = 48 },
                new ChartData { xValue = 40, yValue = 38, yValue1 = 50 },
                new ChartData { xValue = 50, yValue = 54, yValue1 = 66 },
                new ChartData { xValue = 60, yValue = 57, yValue1 = 78 },
                new ChartData { xValue = 70, yValue = 70, yValue1 = 84 },
            };
            ViewBag.dataSource = chartData;
            return View();
        }

        public class ChartData
        {
            public double xValue;
            public double yValue;
            public double yValue1;
        }

Range Padding

Padding can be applied to the minimum and maximum extremes of the axis range by using the rangePadding property. Numeric axis supports following types of padding.

None
Round
Additional
Normal
Auto

Numeric - None

When the rangePadding is set to None, minimum and maximum of an axis is based on the data.

tagHelper

none.cs

<ejs-chart id="container" width="60%">
        <e-chart-primaryxaxis rangePadding="None"></e-chart-primaryxaxis>
        <e-chart-primaryyaxis rangePadding="None"></e-chart-primaryyaxis>
        <e-series-collection>
            <e-series dataSource="ViewBag.dataSource" xName="xValue" yName="yValue" name="India" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Line"></e-series>
        </e-series-collection>
    </ejs-chart>

public ActionResult Index()
        {
            List<ChartData> chartData = new List<ChartData>
            {
                new ChartData { xValue = 10, yValue = 21, yValue1 = 28 },
                new ChartData { xValue = 20, yValue = 24, yValue1 = 44 },
                new ChartData { xValue = 30, yValue = 36, yValue1 = 48 },
                new ChartData { xValue = 40, yValue = 38, yValue1 = 50 },
                new ChartData { xValue = 50, yValue = 54, yValue1 = 66 },
                new ChartData { xValue = 60, yValue = 57, yValue1 = 78 },
                new ChartData { xValue = 70, yValue = 70, yValue1 = 84 },
            };
            ViewBag.dataSource = chartData;
            return View();
        }

        public class ChartData
        {
            public double xValue;
            public double yValue;
            public double yValue1;
        }

Numeric - Round

When the rangePadding is set to Round, minimum and maximum will be rounded to the nearest possible value divisible by interval. For example, when the minimum is 3.5 and the interval is 1, then the minimum will be rounded to 3.

tagHelper

round.cs

<ejs-chart id="container" width="60%">
        <e-chart-primaryyaxis rangePadding="Round"></e-chart-primaryyaxis>
        <e-series-collection>
            <e-series dataSource="ViewBag.dataSource" xName="xValue" yName="yValue" name="India" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Line"></e-series>
        </e-series-collection>
    </ejs-chart>

public ActionResult Index()
        {
            List<ChartData> chartData = new List<ChartData>
            {
                new ChartData { xValue = 10, yValue = 21, yValue1 = 28 },
                new ChartData { xValue = 20, yValue = 24, yValue1 = 44 },
                new ChartData { xValue = 30, yValue = 36, yValue1 = 48 },
                new ChartData { xValue = 40, yValue = 38, yValue1 = 50 },
                new ChartData { xValue = 50, yValue = 54, yValue1 = 66 },
                new ChartData { xValue = 60, yValue = 57, yValue1 = 78 },
                new ChartData { xValue = 70, yValue = 70, yValue1 = 84 },
            };
            ViewBag.dataSource = chartData;
            return View();
        }

        public class ChartData
        {
            public double xValue;
            public double yValue;
            public double yValue1;
        }

Numeric - Additional

When the rangePadding is set to Additional, interval of an axis will be padded to the minimum and maximum of the axis.

tagHelper

additional.cs

<ejs-chart id="container" width="60%">
        <e-chart-primaryyaxis rangePadding="Additional"></e-chart-primaryyaxis>
        <e-series-collection>
            <e-series dataSource="ViewBag.dataSource" xName="xValue" yName="yValue" name="India" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Line"></e-series>
        </e-series-collection>
    </ejs-chart>

public ActionResult Index()
        {
            List<ChartData> chartData = new List<ChartData>
            {
                new ChartData { xValue = 10, yValue = 21, yValue1 = 28 },
                new ChartData { xValue = 20, yValue = 24, yValue1 = 44 },
                new ChartData { xValue = 30, yValue = 36, yValue1 = 48 },
                new ChartData { xValue = 40, yValue = 38, yValue1 = 50 },
                new ChartData { xValue = 50, yValue = 54, yValue1 = 66 },
                new ChartData { xValue = 60, yValue = 57, yValue1 = 78 },
                new ChartData { xValue = 70, yValue = 70, yValue1 = 84 },
            };
            ViewBag.dataSource = chartData;
            return View();
        }

        public class ChartData
        {
            public double xValue;
            public double yValue;
            public double yValue1;
        }

Numeric - Normal

When the rangePadding is set to Normal, padding is applied to the axis based on default range calculation.

tagHelper

normal.cs

<ejs-chart id="container" width="60%">
        <e-chart-primaryyaxis rangePadding="Normal"></e-chart-primaryyaxis>
        <e-series-collection>
            <e-series dataSource="ViewBag.dataSource" xName="xValue" yName="yValue" name="India" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Line"></e-series>
        </e-series-collection>
    </ejs-chart>

public ActionResult Index()
        {
            List<ChartData> chartData = new List<ChartData>
            {
                new ChartData { xValue = 10, yValue = 21, yValue1 = 28 },
                new ChartData { xValue = 20, yValue = 24, yValue1 = 44 },
                new ChartData { xValue = 30, yValue = 36, yValue1 = 48 },
                new ChartData { xValue = 40, yValue = 38, yValue1 = 50 },
                new ChartData { xValue = 50, yValue = 54, yValue1 = 66 },
                new ChartData { xValue = 60, yValue = 57, yValue1 = 78 },
                new ChartData { xValue = 70, yValue = 70, yValue1 = 84 },
            };
            ViewBag.dataSource = chartData;
            return View();
        }

        public class ChartData
        {
            public double xValue;
            public double yValue;
            public double yValue1;
        }

Numeric - Auto

When the rangePadding is set to Auto,horizontal numeric axis takes None as padding calculation, while the vertical numeric axis takes Normal as padding calculation.

tagHelper

auto.cs

<ejs-chart id="container" width="60%">
        <e-chart-primaryyaxis rangePadding="Auto"></e-chart-primaryyaxis>
        <e-series-collection>
            <e-series dataSource="ViewBag.dataSource" xName="xValue" yName="yValue" name="India" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Line"></e-series>
        </e-series-collection>
    </ejs-chart>

public ActionResult Index()
        {
            List<ChartData> chartData = new List<ChartData>
            {
                new ChartData { xValue = 10, yValue = 21, yValue1 = 28 },
                new ChartData { xValue = 20, yValue = 24, yValue1 = 44 },
                new ChartData { xValue = 30, yValue = 36, yValue1 = 48 },
                new ChartData { xValue = 40, yValue = 38, yValue1 = 50 },
                new ChartData { xValue = 50, yValue = 54, yValue1 = 66 },
                new ChartData { xValue = 60, yValue = 57, yValue1 = 78 },
                new ChartData { xValue = 70, yValue = 70, yValue1 = 84 },
            };
            ViewBag.dataSource = chartData;
            return View();
        }

        public class ChartData
        {
            public double xValue;
            public double yValue;
            public double yValue1;
        }

Label Format

Numeric Label Format

Numeric labels can be formatted by using the labelFormat property. Numeric labels supports all globalize format.

tagHelper

label-format.cs

<ejs-chart id="container" width="60%">
        <e-chart-primaryyaxis labelFormat="c"></e-chart-primaryyaxis>
        <e-series-collection>
            <e-series dataSource="ViewBag.dataSource" xName="xValue" yName="yValue" name="India" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Line"></e-series>
        </e-series-collection>
    </ejs-chart>

public ActionResult Index()
        {
            List<ChartData> chartData = new List<ChartData>
            {
                new ChartData { xValue = 10, yValue = 21, yValue1 = 28 },
                new ChartData { xValue = 20, yValue = 24, yValue1 = 44 },
                new ChartData { xValue = 30, yValue = 36, yValue1 = 48 },
                new ChartData { xValue = 40, yValue = 38, yValue1 = 50 },
                new ChartData { xValue = 50, yValue = 54, yValue1 = 66 },
                new ChartData { xValue = 60, yValue = 57, yValue1 = 78 },
                new ChartData { xValue = 70, yValue = 70, yValue1 = 84 },
            };
            ViewBag.dataSource = chartData;
            return View();
        }

        public class ChartData
        {
            public double xValue;
            public double yValue;
            public double yValue1;
        }

The following table describes the result of applying some commonly used label formats on numeric values.

Label Value	Label Format property value	Result	Description
1000	n1	1000.0	The Number is rounded to 1 decimal place
1000	n2	1000.00	The Number is rounded to 2 decimal place
1000	n3	1000.000	The Number is rounded to 3 decimal place
0.01	p1	1.0%	The Number is converted to percentage with 1 decimal place
0.01	p2	1.00%	The Number is converted to percentage with 2 decimal place
0.01	p3	1.000%	The Number is converted to percentage with 3 decimal place
1000	c1	* 000.0	The Currency symbol is appended to number and number is rounded to 1 decimal place
1000	c2	* 000.00	The Currency symbol is appended to number and number is rounded to 2 decimal place

GroupingSeparator

To separate groups of thousands, use useGroupingSeparator property in chart.

Custom Label Format

Axis also supports custom label format using placeholder like {value}°C, in which the value represent the axis label e.g 20°C.

tagHelper

custom.cs

<ejs-chart id="container" width="60%">
        <e-chart-primaryyaxis labelFormat="${value}K"></e-chart-primaryyaxis>
        <e-series-collection>
            <e-series dataSource="ViewBag.dataSource" xName="xValue" yName="yValue" name="India" type="@Syncfusion.EJ2.Charts.ChartSeriesType.Line"></e-series>
        </e-series-collection>
    </ejs-chart>

public ActionResult Index()
        {
            List<ChartData> chartData = new List<ChartData>
            {
                new ChartData { xValue = 10, yValue = 21, yValue1 = 28 },
                new ChartData { xValue = 20, yValue = 24, yValue1 = 44 },
                new ChartData { xValue = 30, yValue = 36, yValue1 = 48 },
                new ChartData { xValue = 40, yValue = 38, yValue1 = 50 },
                new ChartData { xValue = 50, yValue = 54, yValue1 = 66 },
                new ChartData { xValue = 60, yValue = 57, yValue1 = 78 },
                new ChartData { xValue = 70, yValue = 70, yValue1 = 84 },
            };
            ViewBag.dataSource = chartData;
            return View();
        }

        public class ChartData
        {
            public double xValue;
            public double yValue;
            public double yValue1;
        }

Contents

Range
Range Padding
Label Format
GroupingSeparator
Custom Label Format

Contents

Range
Range Padding
Label Format
GroupingSeparator
Custom Label Format