How to create WinForms Excel pie of pie chart in C#, VB.NET?
Syncfusion Essential XlsIO is a .NET Excel library used to create, read, and edit Excel documents. Using this library, you can create pie of pie chart in Excel.
What is a pie of pie chart?
Pie of pie chart make small slices of a pie chart easier to see. This chart type separates the smaller slices from the main pie chart and display them in a secondary pie chart.
Steps to create a pie of pie chart programmatically:
Step 1: Create a chart object by calling the worksheet.Charts.Add method and specify the chart type to ExcelChartType.PieOfPie enum value.
C#
//Create the chart
IChartShape chart = worksheet.Charts.Add();
//Set chart type to PieOfPie
chart.ChartType = ExcelChartType.PieOfPie;
Step 2: Set a range of data from the worksheet to chart’s DataRange property. To plot the series values in column and categories in row, set 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: Add the basic elements like chart title, data labels and legend.
- ChartTitle of chart object.
- Set DataLabels via DefaultDataPoint.
- Set TRUE to chart’s HasLegend property, to show the legend.
C#
//Apply chart elements
//Set Chart Title
chart.ChartTitle = "Pie Of Pie Chart";
//Set Legend
chart.HasLegend = true;
chart.Legend.Position = ExcelLegendPosition.Bottom;
//Set Datalabels
IChartSerie serie = chart.Series[0];
serie.DataPoints.DefaultDataPoint.DataLabels.IsValue = true;
serie.DataPoints.DefaultDataPoint.DataLabels.Position = ExcelDataLabelPosition.BestFit;
Below is the list of other properties that is applicable for a pie of pie chart.
- SplitType
- SplitValue
- Percent
- (Pie Explosion)
- GapWidth
- PieSecondSize
- IsVaryColor (All slices will be represented with same color if IsVaryColor is FALSE)
Applying properties apart from the mentioned list might throw exception or the changes will not be reflected in the output document because those properties are not related to pie of pie chart.
The following C#/ VB.NET complete code snippet shows the creation of pie of pie 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.PieOfPie;
//Assign data
chart.DataRange = worksheet["A3:B7"];
chart.IsSeriesInRows = false;
//Apply chart elements
//Set Chart Title
chart.ChartTitle = "Pie Of Pie Chart";
//Set Legend
chart.HasLegend = true;
chart.Legend.Position = ExcelLegendPosition.Bottom;
//Set Datalabels
IChartSerie serie = chart.Series[0];
serie.DataPoints.DefaultDataPoint.DataLabels.IsValue = true;
serie.DataPoints.DefaultDataPoint.DataLabels.Position = ExcelDataLabelPosition.BestFit;
//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.PieOfPie
'Assign data
chart.DataRange = worksheet("A3:B7")
chart.IsSeriesInRows = False
'Apply chart elements
'Set Chart Title
chart.ChartTitle = "Pie Of Pie Chart"
'Set Legend
chart.HasLegend = True
chart.Legend.Position = ExcelLegendPosition.Bottom
'Set Datalabels
IChartSerie serie = chart.Series[0]
serie.DataPoints.DefaultDataPoint.DataLabels.IsValue = True
serie.DataPoints.DefaultDataPoint.DataLabels.Position = ExcelDataLabelPosition.BestFit
'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
A complete working example to create a pie of pie chart can be downloaded from PieOfPieChart.zip.
Take a moment to peruse the documentation, where you will find other options like move or copy a worksheet, freeze, unfreeze and split panes, show or hide worksheet and worksheet tabs, page setup settings and more with code examples.
Click here to explore the rich set of Syncfusion Excel (XlsIO) library features.
Note:
Starting with v16.2.0.x, if you reference Syncfusion assemblies from trial setup or from the NuGet feed, include a license key in your projects. Refer the link to learn about generating and registering Syncfusion license key in your application to use the components without trail message.
Conclusion
I hope you enjoyed learning about how to create WinForms Excel pie of pie charts 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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