Polar in ASP.NET CORE Charts Component
8 Oct 202424 minutes to read
To get started with the ASP.NET Core Polar charts, you can check on this video:
Polar chart
To render a polar 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
typeas Polar in your chart configuration. This indicates that the data should be represented as a polar chart, which is ideal for plotting data points on a circular graph.
<ejs-chart id="container">
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" name="Germany" xName="x" width="2" opacity="1" yName="y"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Polar" drawType="@Syncfusion.EJ2.Charts.ChartDrawType.Line">
<e-series-marker visible="true" height="10" width="10" shape="Pentagon"></e-series-marker>
</e-series>
</e-series-collection>
</ejs-chart>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.
<ejs-chart id="container">
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" name="Germany" xName="x" width="2" opacity="1" yName="y"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Polar" drawType="@Syncfusion.EJ2.Charts.ChartDrawType.Line">
<e-series-marker visible="true" height="10" width="10" shape="Pentagon"></e-series-marker>
</e-series>
</e-series-collection>
</ejs-chart>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 types
Use the drawType property to change the series plotting type in a Polar chart to line, column, area, range column, spline, scatter, stacking area, spline area, or stacking column. The default value of drawType is Line.
Line
To render a line draw type, you need to follow a few steps to configure it correctly.
Set the series type: Define the series drawType as Line in your chart configuration. This indicates that the data should be represented as a polar line chart, with lines connecting each data point.
<ejs-chart id="container">
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" name="Germany" xName="x" width="2" opacity="1" yName="y"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Polar" drawType="@Syncfusion.EJ2.Charts.ChartDrawType.Line">
<e-series-marker visible="true" height="10" width="10" shape="Pentagon"></e-series-marker>
</e-series>
</e-series-collection>
</ejs-chart>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;
}Spline
To render a spline draw type, you need to follow a few steps to configure it correctly.
Set the series type: Define the series drawType as Spline in your chart configuration. This indicates that the data should be represented as a polar spline chart, with smooth, curved lines connecting each data point.
<ejs-chart id="container">
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" name="Germany" xName="x" width="2" opacity="1" yName="y"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Polar" drawType="@Syncfusion.EJ2.Charts.ChartDrawType.Spline">
<e-series-marker visible="true" height="10" width="10" shape="Pentagon"></e-series-marker>
</e-series>
</e-series-collection>
</ejs-chart>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;
}Area
To render an area draw type, you need to follow a few steps to configure it correctly.
Set the series type: Define the series drawType as Area in your chart configuration. This indicates that the data should be represented as a polar area chart, with filled areas below the lines connecting each data point.
<ejs-chart id="container">
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" name="Germany" xName="x" width="2" opacity="1" yName="y"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Polar" drawType="@Syncfusion.EJ2.Charts.ChartDrawType.Area">
<e-series-marker visible="true" height="10" width="10" shape="Pentagon"></e-series-marker>
</e-series>
</e-series-collection>
</ejs-chart>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;
}Stacked Area
To render a stacked area draw type, you need to follow a few steps to configure it correctly.
Set the series type: Define the series drawType as StackingArea in your chart configuration. This indicates that the data should be represented as a polar stacked area chart, with areas stacked on top of each other, displaying the cumulative value of multiple series.
<ejs-chart id="container">
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" xName="x" width="2" opacity="1" yName="y"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Polar"
drawType="@Syncfusion.EJ2.Charts.ChartDrawType.StackingArea">
</e-series>
<e-series dataSource="ViewBag.dataSource" xName="x" width="2" opacity="1" yName="y1"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Polar"
drawType="@Syncfusion.EJ2.Charts.ChartDrawType.StackingArea">
</e-series>
<e-series dataSource="ViewBag.dataSource" xName="x" width="2" opacity="1" yName="y2"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Polar"
drawType="@Syncfusion.EJ2.Charts.ChartDrawType.StackingArea">
</e-series>
</e-series-collection>
</ejs-chart>public IActionResult Index()
{
List<PolarData> chartData = new List<PolarData>
{
new PolarData{ x=2000, y= 0.61, y1= 0.03, y2= 0.48},
new PolarData{ x=2001, y= 0.81, y1= 0.05, y2= 0.53 },
new PolarData{ x=2002, y= 0.91, y1= 0.06, y2= 0.57 },
new PolarData{ x=2003, y= 1, y1= 0.09, y2= 0.61 },
new PolarData{ x=2004, y= 1.19, y1= 0.14, y2= 0.63 },
new PolarData{ x=2005, y= 1.47, y1= 0.20, y2= 0.64 },
new PolarData{ x=2006, y= 1.74, y1= 0.29, y2= 0.66 },
new PolarData{ x=2007, y= 1.98, y1= 0.46, y2= 0.76 },
new PolarData{ x=2008, y= 1.99, y1= 0.64, y2= 0.77 },
new PolarData{ x=2009, y= 1.70, y1= 0.75, y2= 0.55 }
};
ViewBag.dataSource = chartData;
return View();
}
public class PolarData
{
public double x;
public double y;
public double y1;
public double y2;
}Column
To render a column draw type, you need to follow a few steps to configure it correctly.
Set the series type: Define the series drawType as Column in your chart configuration. This indicates that the data should be represented as a polar column chart, allowing for the comparison of values across categories.
<ejs-chart id="container">
<e-chart-primaryxaxis valueType="Category"></e-chart-primaryxaxis>
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" xName="x" width="2" opacity="1" yName="y"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Polar" drawType="@Syncfusion.EJ2.Charts.ChartDrawType.Column">
</e-series>
</e-series-collection>
</ejs-chart>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 string x;
public double y;
}Stacked Column
To render a stacked column draw type, you need to follow a few steps to configure it correctly.
Set the series type: Define the series drawType as StackingColumn in your chart configuration. This indicates that the data should be represented as a polar stacked column chart, with each column consisting of multiple segments stacked on top of each other.
<ejs-chart id="container">
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" xName="x" width="2" opacity="1" yName="y"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Polar"
drawType="@Syncfusion.EJ2.Charts.ChartDrawType.StackingColumn">
</e-series>
<e-series dataSource="ViewBag.dataSource" xName="x" width="2" opacity="1" yName="y1"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Polar"
drawType="@Syncfusion.EJ2.Charts.ChartDrawType.StackingColumn">
</e-series>
<e-series dataSource="ViewBag.dataSource" xName="x" width="2" opacity="1" yName="y2"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Polar"
drawType="@Syncfusion.EJ2.Charts.ChartDrawType.StackingColumn">
</e-series>
</e-series-collection>
</ejs-chart>public IActionResult Index()
{
List<PolarData> chartData = new List<PolarData>
{
new PolarData{ x=2000, y= 0.61, y1= 0.03, y2= 0.48},
new PolarData{ x=2001, y= 0.81, y1= 0.05, y2= 0.53 },
new PolarData{ x=2002, y= 0.91, y1= 0.06, y2= 0.57 },
new PolarData{ x=2003, y= 1, y1= 0.09, y2= 0.61 },
new PolarData{ x=2004, y= 1.19, y1= 0.14, y2= 0.63 },
new PolarData{ x=2005, y= 1.47, y1= 0.20, y2= 0.64 },
new PolarData{ x=2006, y= 1.74, y1= 0.29, y2= 0.66 },
new PolarData{ x=2007, y= 1.98, y1= 0.46, y2= 0.76 },
new PolarData{ x=2008, y= 1.99, y1= 0.64, y2= 0.77 },
new PolarData{ x=2009, y= 1.70, y1= 0.75, y2= 0.55 }
};
ViewBag.dataSource = chartData;
return View();
}
public class PolarData
{
public double x;
public double y;
public double y1;
public double y2;
}Range Column
To render a range column draw type, you need to follow a few steps to configure it correctly.
Set the series type: Define the series drawType as RangeColumn in your chart configuration. This indicates that the data should be represented as a polar range column chart, where each column spans a range of values.
<ejs-chart id="container">
<e-chart-primaryxaxis valueType="Category"></e-chart-primaryxaxis>
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" xName="x" width="2" opacity="1" high="high" low="low"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Polar"
drawType="@Syncfusion.EJ2.Charts.ChartDrawType.RangeColumn">
</e-series>
</e-series-collection>
</ejs-chart>public IActionResult Index()
{
List<PolarData> chartData = new List<PolarData>
{
new PolarData{ x="Jan", low= 0.7, high= 6.1 },
new PolarData{ x="Feb", low=1.3, high=6.3 },
new PolarData{ x="Mar", low= 1.9, high= 8.5 },
new PolarData{ x= "Apr", low= 3.1, high= 10.8 },
new PolarData{ x="May", low= 5.7, high= 14.40 },
new PolarData { x= "Jun", low= 8.4, high= 16.90 },
new PolarData { x= "Jul", low= 10.6,high= 19.20 },
new PolarData { x= "Aug", low= 10.5,high= 18.9 },
new PolarData { x= "Sep", low= 8.5, high= 16.1 },
new PolarData { x= "Oct", low= 6.0, high= 12.5 },
new PolarData { x= "Nov", low= 1.5, high= 6.9 },
new PolarData { x= "Dec", low= 5.1, high= 12.1 }
};
ViewBag.dataSource = chartData;
return View();
}
public class PolarData
{
public string x;
public double low;
public double high;
}Scatter
To render a scatter draw type, you need to follow a few steps to configure it correctly.
Set the series type: Define the series drawType as Scatter in your chart configuration. This indicates that the data should be represented as a polar scatter chart.
<ejs-chart id="container">
<e-chart-primaryxaxis valueType="Category"></e-chart-primaryxaxis>
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" xName="x" yName="y"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Polar" drawType="@Syncfusion.EJ2.Charts.ChartDrawType.Scatter">
</e-series>
</e-series-collection>
</ejs-chart>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 string x;
public double y;
}Spline area
To render an spline area draw type, you need to follow a few steps to configure it correctly.
Set the series type: Define the series drawType as SplineArea in your chart configuration. This indicates that the data should be represented as a polar spline area chart, where the series is drawn with smooth, curved lines connecting each data point, and the area beneath the line is filled with color.
<ejs-chart id="container">
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" name="Germany" xName="x" width="2" opacity="1" yName="y"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Polar" drawType="@Syncfusion.EJ2.Charts.ChartDrawType.SplineArea">
<e-series-marker visible="true" height="10" width="10" shape="Pentagon"></e-series-marker>
</e-series>
</e-series-collection>
</ejs-chart>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;
}Series customization
Start Angle
You can customize the start angle of the polar series using startAngle property. By default, startAngle is 0 degree.
<ejs-chart id="container">
<e-chart-primaryxaxis startAngle="120" valueType="Category"></e-chart-primaryxaxis>
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" name="Germany" xName="x" width="2" opacity="1" yName="y"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Polar" drawType="@Syncfusion.EJ2.Charts.ChartDrawType.Line">
<e-series-marker visible="true" height="10" width="10" shape="Pentagon"></e-series-marker>
</e-series>
</e-series-collection>
</ejs-chart>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 polar series using coefficient property. By default, coefficient is 100.
<ejs-chart id="container">
<e-chart-primaryxaxis valueType="Category" corfficient="80"></e-chart-primaryxaxis>
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" name="Germany" xName="x" width="2" opacity="1" yName="y"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Polar" drawType="@Syncfusion.EJ2.Charts.ChartDrawType.Line">
<e-series-marker visible="true" height="10" width="10" shape="Pentagon"></e-series-marker>
</e-series>
</e-series-collection>
</ejs-chart>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.
<ejs-chart id="container">
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" name="Germany" xName="x" width="2" opacity="1" yName="y"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Polar" drawType="@Syncfusion.EJ2.Charts.ChartDrawType.Line">
<e-series-marker visible="true" height="10" width="10" shape="Pentagon"></e-series-marker>
<e-series-emptypointSettings mode="EmptyPointMode.Zero"></e-series-emptypointSettings>
</e-series>
</e-series-collection>
</ejs-chart>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.
<ejs-chart id="container">
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" name="Germany" xName="x" width="2" opacity="1" yName="y"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Polar" drawType="@Syncfusion.EJ2.Charts.ChartDrawType.Line">
<e-series-marker visible="true" height="10" width="10" shape="Pentagon"></e-series-marker>
<e-series-emptypointSettings mode="EmptyPointMode.Zero" fill="red"></e-series-emptypointSettings>
</e-series>
</e-series-collection>
</ejs-chart>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.
<ejs-chart id="container">
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" name="Germany" xName="x" width="2" opacity="1" yName="y"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Polar" drawType="@Syncfusion.EJ2.Charts.ChartDrawType.Line">
<e-series-marker visible="true" height="10" width="10" shape="Pentagon"></e-series-marker>
<e-series-emptypointSettings mode="EmptyPointMode.Zero">
<e-emptypointSettings-border width="2" color="green"></e-emptypointSettings-border>
</e-series-emptypointSettings>
</e-series>
</e-series-collection>
</ejs-chart>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.
<ejs-chart id="container" seriesRender="changeColor">
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" name="Germany" xName="x" width="2" opacity="1" yName="y"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Polar" drawType="@Syncfusion.EJ2.Charts.ChartDrawType.Line">
<e-series-marker visible="true" height="10" width="10" shape="Pentagon"></e-series-marker>
</e-series>
</e-series-collection>
</ejs-chart>
<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.
<ejs-chart id="container" pointRender="changeColor">
<e-series-collection>
<e-series dataSource="ViewBag.dataSource" name="Germany" xName="x" width="2" opacity="1" yName="y"
type="@Syncfusion.EJ2.Charts.ChartSeriesType.Polar" drawType="@Syncfusion.EJ2.Charts.ChartDrawType.Line">
<e-series-marker visible="true" height="10" width="10" shape="Pentagon"></e-series-marker>
</e-series>
</e-series-collection>
</ejs-chart>
<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;
}