Radar Chart in ASP.NET MVC Charts

13 May 202524 minutes to read

Radar

To render a radar series in your chart, you need to follow a few steps to configure it correctly. Here’s a concise guide on how to do this:

Set the series type: Define the series Type as Radar in your chart configuration. This indicates that the data should be represented as a radar chart, which is ideal for plotting data points on a circular grid.

@Html.EJS().Chart("container").Series(sr =>
    {
        sr.Type(Syncfusion.EJ2.Charts.ChartSeriesType.Radar)
            .DrawType(Syncfusion.EJ2.Charts.ChartDrawType.Line)
            .Name("Warmest")
            .XName("x")
            .YName("y")
            .Width(2)
            .Marker(marker => marker.Visible(true))
            .DataSource(ViewBag.dataSource).Add();
    }).PrimaryXAxis(xaxis =>
         xaxis.ValueType(Syncfusion.EJ2.Charts.ValueType.Category)
      ).Title("Alaska Weather Statistics - 2016").Render()
public IActionResult Index()
        {
            List<PolarData> chartData = new List<PolarData>
            {
                new PolarData{ x=2005, y = 28 },
                new PolarData{ x=2006, y = 25 },
                new PolarData{ x=2007, y = 26 }, 
                new PolarData{ x=2008, y = 27 },
                new PolarData{ x=2009, y = 32 }, 
                new PolarData{ x=2010, y = 35 },
                new PolarData{ x=2011, y = 30 }
            };
            ViewBag.dataSource = chartData;
            return View();
        }
        public class PolarData
        {
            public double x;
            public double y;
        }

Draw type

Similar to the polar chart, use the DrawType property to change the series plotting type in a Radar chart to line, column, area, range column, spline, scatter, stacking area, spline area, or stacking column. The default value of DrawType is Line.

@Html.EJS().Chart("container").Series(sr =>
    {
        sr.Type(Syncfusion.EJ2.Charts.ChartSeriesType.Radar)
            .DrawType(Syncfusion.EJ2.Charts.ChartDrawType.Line)
            .Name("Warmest")
            .XName("x")
            .YName("y")
            .Width(2)
            .Marker(marker => marker.Visible(true))
            .DataSource(ViewBag.dataSource).Add();
    }).PrimaryXAxis(xaxis =>
         xaxis.ValueType(Syncfusion.EJ2.Charts.ValueType.Category)
      ).Title("Alaska Weather Statistics - 2016").Render()
public IActionResult Index()
        {
            List<PolarData> chartData = new List<PolarData>
            {
                new PolarData{ x=2005, y = 28 },
                new PolarData{ x=2006, y = 25 },
                new PolarData{ x=2007, y = 26 }, 
                new PolarData{ x=2008, y = 27 },
                new PolarData{ x=2009, y = 32 }, 
                new PolarData{ x=2010, y = 35 },
                new PolarData{ x=2011, y = 30 }
            };
            ViewBag.dataSource = chartData;
            return View();
        }
        public class PolarData
        {
            public double x;
            public double y;
        }

Binding data with series

You can bind data to the chart using the DataSource property within the series configuration. This allows you to connect a JSON dataset or remote data to your chart. To display the data correctly, map the fields from the data to the chart series XName and YName properties.

@Html.EJS().Chart("container").Series(sr =>
    {
        sr.Type(Syncfusion.EJ2.Charts.ChartSeriesType.Radar)
            .DrawType(Syncfusion.EJ2.Charts.ChartDrawType.Line)
            .Name("Warmest")
            .XName("x")
            .YName("y")
            .Width(2)
            .Marker(marker => marker.Visible(true))
            .DataSource(ViewBag.dataSource).Add();
    }).PrimaryXAxis(xaxis =>
         xaxis.ValueType(Syncfusion.EJ2.Charts.ValueType.Category)
      ).Title("Alaska Weather Statistics - 2016").Render()
public IActionResult Index()
        {
            List<PolarData> chartData = new List<PolarData>
            {
                new PolarData{ x=2005, y = 28 },
                new PolarData{ x=2006, y = 25 },
                new PolarData{ x=2007, y = 26 }, 
                new PolarData{ x=2008, y = 27 },
                new PolarData{ x=2009, y = 32 }, 
                new PolarData{ x=2010, y = 35 },
                new PolarData{ x=2011, y = 30 }
            };
            ViewBag.dataSource = chartData;
            return View();
        }
        public class PolarData
        {
            public double x;
            public double y;
        }

Customization

Start angle

You can customize the start angle of the radar series using StartAngle property. By default, startAngle is 0 degree.

@Html.EJS().Chart("container").Series(sr =>
    {
        sr.Type(Syncfusion.EJ2.Charts.ChartSeriesType.Radar)
            .DrawType(Syncfusion.EJ2.Charts.ChartDrawType.Line)
            .Name("Warmest")
            .XName("x")
            .YName("y")
            .Width(2)
            .Marker(marker => marker.Visible(true))
            .DataSource(ViewBag.dataSource).Add();
    }).PrimaryXAxis(xaxis =>
         xaxis.ValueType(Syncfusion.EJ2.Charts.ValueType.Category).StartAngle(120)
      ).Title("Alaska Weather Statistics - 2016").Render()
public IActionResult Index()
        {
            List<PolarData> chartData = new List<PolarData>
            {
                new PolarData{ x=2005, y = 28 },
                new PolarData{ x=2006, y = 25 },
                new PolarData{ x=2007, y = 26 }, 
                new PolarData{ x=2008, y = 27 },
                new PolarData{ x=2009, y = 32 }, 
                new PolarData{ x=2010, y = 35 },
                new PolarData{ x=2011, y = 30 }
            };
            ViewBag.dataSource = chartData;
            return View();
        }
        public class PolarData
        {
            public double x;
            public double y;
        }

Radius

You can customize the radius of the radar series using Coefficient property. By default, Coefficient is 100.

@Html.EJS().Chart("container").Series(sr =>
    {
        sr.Type(Syncfusion.EJ2.Charts.ChartSeriesType.Radar)
            .DrawType(Syncfusion.EJ2.Charts.ChartDrawType.Line)
            .Name("Warmest")
            .XName("x")
            .YName("y")
            .Width(2)
            .Marker(marker => marker.Visible(true))
            .DataSource(ViewBag.dataSource).Add();
    }).PrimaryXAxis(xaxis =>
         xaxis.ValueType(Syncfusion.EJ2.Charts.ValueType.Category).Coefficient(80)
      ).Title("Alaska Weather Statistics - 2016").Render()
public IActionResult Index()
        {
            List<PolarData> chartData = new List<PolarData>
            {
                new PolarData{ x=2005, y = 28 },
                new PolarData{ x=2006, y = 25 },
                new PolarData{ x=2007, y = 26 }, 
                new PolarData{ x=2008, y = 27 },
                new PolarData{ x=2009, y = 32 }, 
                new PolarData{ x=2010, y = 35 },
                new PolarData{ x=2011, y = 30 }
            };
            ViewBag.dataSource = chartData;
            return View();
        }
        public class PolarData
        {
            public double x;
            public double y;
        }

Empty points

Data points with null or undefined values are considered empty. Empty data points are ignored and not plotted on the chart.

Mode

Use the Mode property to define how empty or missing data points are handled in the series. The default mode for empty points is Gap.

@Html.EJS().Chart("container").Series(sr =>
    {
        sr.Type(Syncfusion.EJ2.Charts.ChartSeriesType.Radar)
            .DrawType(Syncfusion.EJ2.Charts.ChartDrawType.Line)
            .Name("Warmest")
            .EmptyPointSettings(empty => empty.Mode(Syncfusion.EJ2.Charts.EmptyPointMode.Zero))
            .XName("x")
            .YName("y")
            .Width(2)
            .Marker(marker => marker.Visible(true))
            .DataSource(ViewBag.dataSource).Add();
    }).PrimaryXAxis(xaxis =>
         xaxis.ValueType(Syncfusion.EJ2.Charts.ValueType.Category)
      ).Title("Alaska Weather Statistics - 2016").Render()
public IActionResult Index()
        {
            List<PolarData> chartData = new List<PolarData>
            {
                new PolarData{ x=2005, y = 28 },
                new PolarData{ x=2006, y = 25 },
                new PolarData{ x=2007, y = null }, 
                new PolarData{ x=2008, y = 27 },
                new PolarData{ x=2009, y = 32 }, 
                new PolarData{ x=2010, y = null },
                new PolarData{ x=2011, y = 30 }
            };
            ViewBag.dataSource = chartData;
            return View();
        }
        public class PolarData
        {
            public double x;
            public double y;
        }

Fill

Use the Fill property to customize the fill color of empty points in the series.

@Html.EJS().Chart("container").Series(sr =>
    {
        sr.Type(Syncfusion.EJ2.Charts.ChartSeriesType.Radar)
            .DrawType(Syncfusion.EJ2.Charts.ChartDrawType.Line)
            .Name("Warmest")
            .EmptyPointSettings(empty => empty.Mode(Syncfusion.EJ2.Charts.EmptyPointMode.Zero).Fill("red"))
            .XName("x")
            .YName("y")
            .Width(2)
            .Marker(marker => marker.Visible(true).IsFilled(true))
            .DataSource(ViewBag.dataSource).Add();
    }).PrimaryXAxis(xaxis =>
         xaxis.ValueType(Syncfusion.EJ2.Charts.ValueType.Category)
      ).Title("Alaska Weather Statistics - 2016").Render()
public IActionResult Index()
        {
            List<PolarData> chartData = new List<PolarData>
            {
                new PolarData{ x=2005, y = 28 },
                new PolarData{ x=2006, y = 25 },
                new PolarData{ x=2007, y = null }, 
                new PolarData{ x=2008, y = 27 },
                new PolarData{ x=2009, y = 32 }, 
                new PolarData{ x=2010, y = null },
                new PolarData{ x=2011, y = 30 }
            };
            ViewBag.dataSource = chartData;
            return View();
        }
        public class PolarData
        {
            public double x;
            public double y;
        }

Border

Use the Border property to customize the width and color of the border for empty points.

@Html.EJS().Chart("container").Series(sr =>
    {
        sr.Type(Syncfusion.EJ2.Charts.ChartSeriesType.Radar)
            .DrawType(Syncfusion.EJ2.Charts.ChartDrawType.Line)
            .Name("Warmest")
            .EmptyPointSettings(empty => empty.Mode(Syncfusion.EJ2.Charts.EmptyPointMode.Zero)..EmptyPointSettings(empty => empty.Mode(Syncfusion.EJ2.Charts.EmptyPointMode.Zero).Border(border => border.Width(2).Color("green"))))
            .XName("x")
            .YName("y")
            .Width(2)
            .Marker(marker => marker.Visible(true).IsFilled(true))
            .DataSource(ViewBag.dataSource).Add();
    }).PrimaryXAxis(xaxis =>
         xaxis.ValueType(Syncfusion.EJ2.Charts.ValueType.Category)
      ).Title("Alaska Weather Statistics - 2016").Render()
public IActionResult Index()
        {
            List<PolarData> chartData = new List<PolarData>
            {
                new PolarData{ x=2005, y = 28 },
                new PolarData{ x=2006, y = 25 },
                new PolarData{ x=2007, y = null }, 
                new PolarData{ x=2008, y = 27 },
                new PolarData{ x=2009, y = 32 }, 
                new PolarData{ x=2010, y = null },
                new PolarData{ x=2011, y = 30 }
            };
            ViewBag.dataSource = chartData;
            return View();
        }
        public class PolarData
        {
            public double x;
            public double y;
        }

Events

Series render

The SeriesRender event allows you to customize series properties, such as data, fill, and name, before they are rendered on the chart.

@Html.EJS().Chart("container").SeriesRender("changeColor").Series(sr =>
    {
        sr.Type(Syncfusion.EJ2.Charts.ChartSeriesType.Radar)
            .DrawType(Syncfusion.EJ2.Charts.ChartDrawType.Line)
            .Name("Warmest")
            .XName("x")
            .YName("y")
            .Width(2)
            .Marker(marker => marker.Visible(true))
            .DataSource(ViewBag.dataSource).Add();
    }).PrimaryXAxis(xaxis =>
         xaxis.ValueType(Syncfusion.EJ2.Charts.ValueType.Category)
      ).Title("Alaska Weather Statistics - 2016").Render()

<script>
    function changeColor(args) {
        args.fill = '#ff6347';
    }
</script>
public IActionResult Index()
        {
            List<PolarData> chartData = new List<PolarData>
            {
                new PolarData{ x=2005, y = 28 },
                new PolarData{ x=2006, y = 25 },
                new PolarData{ x=2007, y = 26 }, 
                new PolarData{ x=2008, y = 27 },
                new PolarData{ x=2009, y = 32 }, 
                new PolarData{ x=2010, y = 35 },
                new PolarData{ x=2011, y = 30 }
            };
            ViewBag.dataSource = chartData;
            return View();
        }
        public class PolarData
        {
            public double x;
            public double y;
        }

Point render

The PointRender event allows you to customize each data point before it is rendered on the chart.

@Html.EJS().Chart("container").PointRender("changeColor").Series(sr =>
    {
        sr.Type(Syncfusion.EJ2.Charts.ChartSeriesType.Radar)
            .DrawType(Syncfusion.EJ2.Charts.ChartDrawType.Line)
            .Name("Warmest")
            .XName("x")
            .YName("y")
            .Width(2)
            .Marker(marker => marker.Visible(true))
            .DataSource(ViewBag.dataSource).Add();
    }).PrimaryXAxis(xaxis =>
         xaxis.ValueType(Syncfusion.EJ2.Charts.ValueType.Category)
      ).Title("Alaska Weather Statistics - 2016").Render()

<script>
    function changeColor(args) {
        if (args.point.index % 2 !== 0) {
            args.fill = '#ff6347';
        }
        else {
            args.fill = '#009cb8';
        }
    }
</script>
public IActionResult Index()
        {
            List<PolarData> chartData = new List<PolarData>
            {
                new PolarData{ x=2005, y = 28 },
                new PolarData{ x=2006, y = 25 },
                new PolarData{ x=2007, y = 26 }, 
                new PolarData{ x=2008, y = 27 },
                new PolarData{ x=2009, y = 32 }, 
                new PolarData{ x=2010, y = 35 },
                new PolarData{ x=2011, y = 30 }
            };
            ViewBag.dataSource = chartData;
            return View();
        }
        public class PolarData
        {
            public double x;
            public double y;
        }

See Also