How to create the PowerPoint pie chart in C# and VB.NET?
This article explains how to create a pie chart in .NET PowerPoint using Presentation library.
What is a pie chart
A pie chart (or a circle chart) is a circular statistical graphic that is divided into slices to illustrate the numerical proportion. In a pie chart, the arc length of each slice is proportional to the quantity it represents.
Pie chart created using Presentation library
Steps to create pie chart in PowerPoint using Presentation library:
- Initialize chart
Create a chart object by calling the slide.Charts.AddChart method and specify the chart type OfficeChartType.Pie enum value.
//Create the chart IPresentationChart chart = slide.Charts.AddChart(100, 10, 700, 500); //Set chart type to pie chart.ChartType = OfficeChartType.Pie;
- Assign data and chart elements
Add the basic elements like chart title, data labels, and legend.
- ChartTitle of chart object.
- Set DataLabels via DefaultDataPoint.
- Add CategoryLabels and Values.
- Set TRUE to chart’s HasLegend property to show the legend, else FALSE.
//Apply chart elements
//Set chart title
chart.ChartTitle = " Pie Chart ";
//Set legend
chart.HasLegend = true;
//Set Datalabels, CategoryLabels, and Values
IOfficeChartSerie serie = chart.Series.Add("Percentage");
serie.CategoryLabels = chart.ChartData[3, 1, 7, 1];
serie.Values = chart.ChartData[3, 2, 7, 2];
serie.DataPoints.DefaultDataPoint.DataLabels.IsValue = true;
serie.DataPoints.DefaultDataPoint.DataLabels.Position = OfficeDataLabelPosition.Bottom;
Applicable properties of pie chart
Below is the list of other properties that is applicable for a pie chart.
1. Percent (Pie Explosion)
3. IsVaryColor (All slices will be represented with same color if IsVaryColor is FALSE)
NOTE: Applying properties apart from the mentioned list may throw exception or the changes will not be reflected in the output document because, those properties are not related to pie chart.
To learn more about creating charts with various settings using Presentation library, please refer to the documentation.
The following C#/ VB.NET complete code snippet shows the creation of pie chart using Presentation library.
C#
using Syncfusion.Presentation;
using Syncfusion.OfficeChart;
using System.IO;
namespace ChartSample
{
class Program
{
static void Main(string[] args)
{
//Create an instance for PowerPoint
using (IPresentation pptxDoc = Presentation.Create())
{
//Add a blank slide to Presentation
ISlide slide = pptxDoc.Slides.Add(SlideLayoutType.Blank);
//Adds chart to the slide with position and size
IPresentationChart chart = slide.Charts.AddChart(100, 10, 700, 500);
chart.ChartType = OfficeChartType.Pie;
//Assign data
chart.DataRange = chart.ChartData[2, 1, 6, 2];
chart.IsSeriesInRows = false;
//Set data to the chart- RowIndex, columnIndex, and data
SetChartData(chart);
//Apply chart elements
//Set Chart Title
chart.ChartTitle = "Pie Chart";
//Set Legend
chart.HasLegend = true;
chart.Legend.Position = OfficeLegendPosition.Bottom;
//Set Datalabels
IOfficeChartSerie serie = chart.Series[0];
serie.DataPoints.DefaultDataPoint.DataLabels.IsValue = true;
serie.DataPoints.DefaultDataPoint.DataLabels.Position = OfficeDataLabelPosition.BestFit;
//Saving and closing the presentation
Stream stream = File.Create("Output.pptx");
pptxDoc.Save(stream);
}
}
/// <summary>
/// Set the values for the chart
/// </summary>
/// <param name="chart">Represent the instance of the Presentation chart</param>
private static void SetChartData(IPresentationChart chart)
{
//Set the value for chart data
chart.ChartData.SetValue(1, 1, "Food");
chart.ChartData.SetValue(2, 1, "Fruits");
chart.ChartData.SetValue(3, 1, "Vegetables");
chart.ChartData.SetValue(4, 1, "Dairy");
chart.ChartData.SetValue(5, 1, "Protein");
chart.ChartData.SetValue(6, 1, "Grains");
chart.ChartData.SetValue(1, 2, "Percentage");
chart.ChartData.SetValue(2, 2, 36);
chart.ChartData.SetValue(3, 2, 14);
chart.ChartData.SetValue(4, 2, 13);
chart.ChartData.SetValue(5, 2, 28);
chart.ChartData.SetValue(6, 2, 9);
}
}
}
VB
Imports Syncfusion.Presentation
Imports Syncfusion.OfficeChart
Imports System.IO
Namespace ChartSample
Class Program
Public Shared Sub Main(ByVal args() As String)
'Create an instance for PowerPoint
Dim pptxDoc As IPresentation = Presentation.Create()
'Add a blank slide to Presentation
Dim slide As ISlide = pptxDoc.Slides.Add(SlideLayoutType.Blank)
'Adds chart to the slide with position and size
Dim chart As IPresentationChart = slide.Charts.AddChart(100, 10, 700, 500)
chart.ChartType = OfficeChartType.Pie
'Assign data
chart.DataRange = chart.ChartData(2, 1, 6, 2)
chart.IsSeriesInRows = false
'Set data to the chart RowIndex, columnIndex, and data
Program.SetChartData(chart)
'Apply chart elements
'Set Chart Title
chart.ChartTitle = "Pie Chart"
'Set Legend
chart.HasLegend = true
chart.Legend.Position = OfficeLegendPosition.Bottom
'Set Datalabels
Dim serie As IOfficeChartSerie = chart.Series(0)
serie.DataPoints.DefaultDataPoint.DataLabels.IsValue = true
serie.DataPoints.DefaultDataPoint.DataLabels.Position = OfficeDataLabelPosition.BestFit
'Saving and closing the presentation
Dim stream As Stream = File.Create("Output.pptx")
pptxDoc.Save(stream)
End Sub
''' <summary>
''' Set the values for the chart
''' </summary>
''' <param name="chart">Represent the instance of the Presentation chart</param>
Private Shared Sub SetChartData(ByVal chart As IPresentationChart)
'Set the value for chart data
chart.ChartData.SetValue(1, 1, "Food")
chart.ChartData.SetValue(2, 1, "Fruits")
chart.ChartData.SetValue(3, 1, "Vegetables")
chart.ChartData.SetValue(4, 1, "Dairy")
chart.ChartData.SetValue(5, 1, "Protein")
chart.ChartData.SetValue(6, 1, "Grains")
chart.ChartData.SetValue(1, 2, "Percentage")
chart.ChartData.SetValue(2, 2, 36)
chart.ChartData.SetValue(3, 2, 14)
chart.ChartData.SetValue(4, 2, 13)
chart.ChartData.SetValue(5, 2, 28)
chart.ChartData.SetValue(6, 2, 9)
End Sub
End Class
End Namespace
Conclusion
I hope you enjoyed learning about how to create the PowerPoint pie chart in C# and VB.NET.
You can refer to our .NET Presentation feature tour page to know about its other groundbreaking feature representations. You can also explore our documentation to understand how to create and manipulate data.
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