How to create Excel radar chart in C#, VB.NET?
This article explains how to create a radar chart in Excel using the Syncfusion Excel (XlsIO) library.
What is a radar chart?
Radar charts compare the aggregate values of several data series by plotting the values of each category along a separate axis that starts in the center of the chart and ends on the outer ring.
Radar Chart
To create a radar chart in Excel using XlsIO, you need to do the following steps.
Steps to create a radar chart:
Step 1: Initialize the chart
Create a chart object by calling the worksheet.Charts.Add method and specify the chart type to ExcelChartType.Radar enum value.
C#
// Create the chart IChartShape chart = worksheet.Charts.Add(); // Set chart type to Radar chart.ChartType = ExcelChartType.Radar;
Step 2: Assign data
Set a range of data from the worksheet to the chart’s DataRange property. To plot the series values in columns and categories in rows, set the chart’s IsSeriesInRows property to false.
C#
// Set region of Chart data chart.DataRange = worksheet["A3:B7"]; // Set chart series in column for assigned data region chart.IsSeriesInRows = false;
Step 3: Apply basic chart elements
Add the basic elements like the chart title, data labels and legend.
- ChartTitle of the chart object.
- Set DataLabels via DefaultDataPoint.
- Set TRUE to the chart’s HasLegend property, to show the legend.
C#
// Apply chart elements // Set Chart Title chart.ChartTitle = "Radar Chart"; // Set Legend chart.HasLegend = false; // Set DataLabels IChartSerie serie = chart.Series[0]; serie.DataPoints.DefaultDataPoint.DataLabels.IsValue = true;
Applicable properties of radar chart
Other property that is applicable for a radar chart.
- HasRadarAxisLablesNote:
Applying properties apart from the mentioned property might throw exceptions or the changes will not be reflected in the output document because those properties are not related to radar charts.
To know more about creating charts with various settings using the Syncfusion Excel (XlsIO) library, please refer to the documentation.
The following C#/ VB.NET complete code snippet shows the creation of radar chart using XlsIO.
C#
using Syncfusion.XlsIO;
using System.Reflection;
using System.IO;
namespace ChartSample
{
class Program
{
static void Main(string[] args)
{
using (ExcelEngine excelEngine = new ExcelEngine())
{
IApplication application = excelEngine.Excel;
application.DefaultVersion = ExcelVersion.Excel2016;
// Open existing workbook with data entered
Assembly assembly = typeof(Program).GetTypeInfo().Assembly;
Stream fileStream = assembly.GetManifestResourceStream("ChartSample.InputTemplate.xlsx");
IWorkbook workbook = application.Workbooks.Open(fileStream);
IWorksheet worksheet = workbook.Worksheets[0];
// Initialize chart
IChartShape chart = worksheet.Charts.Add();
chart.ChartType = ExcelChartType.Radar;
// Assign data
chart.DataRange = worksheet["A3:B7"];
chart.IsSeriesInRows = false;
// Apply chart elements
// Set Chart Title
chart.ChartTitle = "Radar Chart";
// Set Legend
chart.HasLegend = false;
// Set DataLabels
IChartSerie serie = chart.Series[0];
serie.DataPoints.DefaultDataPoint.DataLabels.IsValue = true;
// Positioning the chart in the worksheet
chart.TopRow = 8;
chart.LeftColumn = 1;
chart.BottomRow = 23;
chart.RightColumn = 8;
// Saving and closing the workbook
Stream stream = File.Create("Output.xlsx");
workbook.SaveAs(stream);
}
}
}
}
VB.NET
Imports Syncfusion.XlsIO
Imports System.Reflection
Imports System.IO
Namespace ChartSample
Class Program
Public Shared Sub Main(ByVal args As String())
Using excelEngine As ExcelEngine = New ExcelEngine()
Dim application As IApplication = excelEngine.Excel
application.DefaultVersion = ExcelVersion.Excel2016
'Open existing workbook with data entered
Dim assembly As Assembly = GetType(Program).GetTypeInfo().Assembly
Dim fileStream As Stream = assembly.GetManifestResourceStream("ChartSample.InputTemplate.xlsx")
Dim workbook As IWorkbook = application.Workbooks.Open(fileStream)
Dim worksheet As IWorksheet = workbook.Worksheets(0)
'Initialize chart
Dim chart As IChartShape = worksheet.Charts.Add()
chart.ChartType = ExcelChartType.Radar
'Assign data
chart.DataRange = worksheet("A3:B7")
chart.IsSeriesInRows = False
'Apply chart elements
'Set Chart Title
chart.ChartTitle = "Radar Chart"
'Set Legend
chart.HasLegend = False
'Set DataLabels
IChartSerie serie = chart.Series[0]
serie.DataPoints.DefaultDataPoint.DataLabels.IsValue = True
'Positioning chart in the worksheet
chart.TopRow = 8
chart.LeftColumn = 1
chart.BottomRow = 23
chart.RightColumn = 8
'Saving and closing the workbook
Dim stream As Stream = File.Create("Output.xlsx")
workbook.SaveAs(stream)
End Using
End Sub
End Class
End Namespace
Take a moment to peruse the documentation where you can find basic Excel document processing options along with the features like import and export data, chart, formulas, conditional formatting, data validation, tables, pivot tables and protect the Excel documents, and most importantly, the PDF, CSV and Image conversions with code examples.
Conclusion
I hope you enjoyed learning about how to create Excel radar chart in C#, VB.NET.
You can refer to our WinForms Excel feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications. You can also explore our WinForms Excel example to understand how to create and manipulate data.
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