Create PowerPoint Presentations Charts in C# .NET

Create Chart

Charts help people to quickly visualize data and gain insights, which may not be immediately obvious from a table or spreadsheet.

Why Create Charts?

Using charts, you get to

  • aggregate, condense, or summarize large amounts of data on a single slide in a presentation
  • expose patterns and trends in data
  • deduce the direction and momentum of data over time or with respect to a specific unit of measurement
  • spots outliers, aberrations, deviations, errors, nonsensical data, etc.
  • communicate or present complex data

In PowerPoint, you can create charts through the insert function, which provides templates used to design many types of charts. Using Aspose.Slides, you can create regular charts (based on popular chart types) and custom charts.

Creating Normal Charts

  1. Create an instance of the Presentation class.
  2. Get a slide’s reference through its index.
  3. Add a chart with some data and specify your preferred chart type.
  4. Add a title for the chart.
  5. Access the chart data worksheet.
  6. Clear all the default series and categories.
  7. Add new series and categories.
  8. Add some new chart data for the chart series.
  9. Add a fill color for chart series.
  10. Add labels for the chart series.
  11. Write the modified presentation as a PPTX file.

This C# code shows you how to create a normal chart:

// Instantiates the Presentation class that represents a PPTX file
Presentation pres = new Presentation();

// Accesses the first slide
ISlide sld = pres.Slides[0];

// Adds a chart with its default data
IChart chart = sld.Shapes.AddChart(ChartType.ClusteredColumn, 0, 0, 500, 500);

// Sets the chart title
chart.ChartTitle.AddTextFrameForOverriding("Sample Title");
chart.ChartTitle.TextFrameForOverriding.TextFrameFormat.CenterText = NullableBool.True;
chart.ChartTitle.Height = 20;
chart.HasTitle = true;

// Sets the first series to show values
chart.ChartData.Series[0].Labels.DefaultDataLabelFormat.ShowValue = true;

// Sets the index for the chart data sheet
int defaultWorksheetIndex = 0;

// Gets the chart data worksheet
IChartDataWorkbook fact = chart.ChartData.ChartDataWorkbook;

// Deletes the default generated series and categories
chart.ChartData.Series.Clear();
chart.ChartData.Categories.Clear();
int s = chart.ChartData.Series.Count;
s = chart.ChartData.Categories.Count;

// Adds new series
chart.ChartData.Series.Add(fact.GetCell(defaultWorksheetIndex, 0, 1, "Series 1"), chart.Type);
chart.ChartData.Series.Add(fact.GetCell(defaultWorksheetIndex, 0, 2, "Series 2"), chart.Type);

// Adds new categories
chart.ChartData.Categories.Add(fact.GetCell(defaultWorksheetIndex, 1, 0, "Caetegoty 1"));
chart.ChartData.Categories.Add(fact.GetCell(defaultWorksheetIndex, 2, 0, "Caetegoty 2"));
chart.ChartData.Categories.Add(fact.GetCell(defaultWorksheetIndex, 3, 0, "Caetegoty 3"));

// Takes the first chart series
IChartSeries series = chart.ChartData.Series[0];

// Populates series data

series.DataPoints.AddDataPointForBarSeries(fact.GetCell(defaultWorksheetIndex, 1, 1, 20));
series.DataPoints.AddDataPointForBarSeries(fact.GetCell(defaultWorksheetIndex, 2, 1, 50));
series.DataPoints.AddDataPointForBarSeries(fact.GetCell(defaultWorksheetIndex, 3, 1, 30));

// Sets the fill color for the series
series.Format.Fill.FillType = FillType.Solid;
series.Format.Fill.SolidFillColor.Color = Color.Red;


// Takes the second chart series
series = chart.ChartData.Series[1];

// Populates series data
series.DataPoints.AddDataPointForBarSeries(fact.GetCell(defaultWorksheetIndex, 1, 2, 30));
series.DataPoints.AddDataPointForBarSeries(fact.GetCell(defaultWorksheetIndex, 2, 2, 10));
series.DataPoints.AddDataPointForBarSeries(fact.GetCell(defaultWorksheetIndex, 3, 2, 60));

// Sets the fill color for series
series.Format.Fill.FillType = FillType.Solid;
series.Format.Fill.SolidFillColor.Color = Color.Green;

// Sets the first label to show Category name
IDataLabel lbl = series.DataPoints[0].Label;
lbl.DataLabelFormat.ShowCategoryName = true;

lbl = series.DataPoints[1].Label;
lbl.DataLabelFormat.ShowSeriesName = true;

// Sets the series to show the value for the third label
lbl = series.DataPoints[2].Label;
lbl.DataLabelFormat.ShowValue = true;
lbl.DataLabelFormat.ShowSeriesName = true;
lbl.DataLabelFormat.Separator = "/";
            
// Saves the PPTX file to disk
pres.Save("AsposeChart_out.pptx", SaveFormat.Pptx);

Creating Scattered Charts

Scattered charts (also known as scattered plots or x-y graphs) are often used to check for patterns or demonstrate correlations between two variables.

You may want to use a scattered chart when

  • you have paired numerical data
  • you have 2 variables that pair well together
  • you want to determine whether 2 variables are related
  • you have an independent variable that has multiple values for a dependent variable

This C# code shows you how to create a scattered charts with a different series of markers:

Presentation pres = new Presentation();

ISlide slide = pres.Slides[0];

// Creates the default chart
IChart chart = slide.Shapes.AddChart(ChartType.ScatterWithSmoothLines, 0, 0, 400, 400);

// Gets the default chart data worksheet index
int defaultWorksheetIndex = 0;

// Gets the chart data worksheet
IChartDataWorkbook fact = chart.ChartData.ChartDataWorkbook;

// Deletes the demo series
chart.ChartData.Series.Clear();

// Adds new series
chart.ChartData.Series.Add(fact.GetCell(defaultWorksheetIndex, 1, 1, "Series 1"), chart.Type);
chart.ChartData.Series.Add(fact.GetCell(defaultWorksheetIndex, 1, 3, "Series 2"), chart.Type);

// Takes the first chart series
IChartSeries series = chart.ChartData.Series[0];

// Adds a new point (1:3) to the series
series.DataPoints.AddDataPointForScatterSeries(fact.GetCell(defaultWorksheetIndex, 2, 1, 1), fact.GetCell(defaultWorksheetIndex, 2, 2, 3));

// Adds a new point (2:10)
series.DataPoints.AddDataPointForScatterSeries(fact.GetCell(defaultWorksheetIndex, 3, 1, 2), fact.GetCell(defaultWorksheetIndex, 3, 2, 10));

// Changes the series type
series.Type = ChartType.ScatterWithStraightLinesAndMarkers;

// Changes the chart series marker
series.Marker.Size = 10;
series.Marker.Symbol = MarkerStyleType.Star;

// Takes second chart series
series = chart.ChartData.Series[1];

// Adds a new point (5:2) to the chart series
series.DataPoints.AddDataPointForScatterSeries(fact.GetCell(defaultWorksheetIndex, 2, 3, 5), fact.GetCell(defaultWorksheetIndex, 2, 4, 2));

// Adds a new point (3:1)
series.DataPoints.AddDataPointForScatterSeries(fact.GetCell(defaultWorksheetIndex, 3, 3, 3), fact.GetCell(defaultWorksheetIndex, 3, 4, 1));

// Adds a new point (2:2)
series.DataPoints.AddDataPointForScatterSeries(fact.GetCell(defaultWorksheetIndex, 4, 3, 2), fact.GetCell(defaultWorksheetIndex, 4, 4, 2));

// Adds a new point (5:1)
series.DataPoints.AddDataPointForScatterSeries(fact.GetCell(defaultWorksheetIndex, 5, 3, 5), fact.GetCell(defaultWorksheetIndex, 5, 4, 1));

// Changes the chart series marker
series.Marker.Size = 10;
series.Marker.Symbol = MarkerStyleType.Circle;

// Saves the PPTX file to disk
pres.Save("AsposeChart_out.pptx", SaveFormat.Pptx);

Creating Pie Charts

Pie charts are best used to show the part-to-whole relationship in data, especially when the data contains categorical labels with numeric values. However, if your data contains many parts or labels, you may want to consider using a bar chart instead.

  1. Create an instance of the Presentation class.
  2. Get a slide’s reference through its index.
  3. Add a chart with default data along with the desired type (in this case, ChartType.Pie).
  4. Access the chart data IChartDataWorkbook.
  5. Clear the default series and categories.
  6. Add new series and categories.
  7. Add new chart data for the chart series.
  8. Add new points for charts and add custom colors for the pie chart’s sectors.
  9. Set labels for series.
  10. Set leader lines for series labels.
  11. Set the rotation angle for pie chart slides.
  12. Write the modified presentation to a PPTX file

This C# code shows you how to create a pie chart:

// Instantiates a Presentation class that represents a PPTX file
Presentation presentation = new Presentation();

// Accesses the first slide
ISlide slides = presentation.Slides[0];

// Adds a chart with its default data
IChart chart = slides.Shapes.AddChart(ChartType.Pie, 100, 100, 400, 400);

// Sets the chart Title
chart.ChartTitle.AddTextFrameForOverriding("Sample Title");
chart.ChartTitle.TextFrameForOverriding.TextFrameFormat.CenterText = NullableBool.True;
chart.ChartTitle.Height = 20;
chart.HasTitle = true;

// Sets the first series to show values
chart.ChartData.Series[0].Labels.DefaultDataLabelFormat.ShowValue = true;

// Sets the index for the chart data sheet
int defaultWorksheetIndex = 0;

// Gets the chart data worksheet
IChartDataWorkbook fact = chart.ChartData.ChartDataWorkbook;

// Deletes the default generated series and categories
chart.ChartData.Series.Clear();
chart.ChartData.Categories.Clear();

// Adds new categories
chart.ChartData.Categories.Add(fact.GetCell(0, 1, 0, "First Qtr"));
chart.ChartData.Categories.Add(fact.GetCell(0, 2, 0, "2nd Qtr"));
chart.ChartData.Categories.Add(fact.GetCell(0, 3, 0, "3rd Qtr"));

// Adds new series
IChartSeries series = chart.ChartData.Series.Add(fact.GetCell(0, 0, 1, "Series 1"), chart.Type);

// Populates the series data
series.DataPoints.AddDataPointForPieSeries(fact.GetCell(defaultWorksheetIndex, 1, 1, 20));
series.DataPoints.AddDataPointForPieSeries(fact.GetCell(defaultWorksheetIndex, 2, 1, 50));
series.DataPoints.AddDataPointForPieSeries(fact.GetCell(defaultWorksheetIndex, 3, 1, 30));

// Not working in new version 
// Adding new points and setting sector color
// series.IsColorVaried = true;
chart.ChartData.SeriesGroups[0].IsColorVaried = true;

IChartDataPoint point = series.DataPoints[0];
point.Format.Fill.FillType = FillType.Solid;
point.Format.Fill.SolidFillColor.Color = Color.Cyan;
// Sets the Sector border
point.Format.Line.FillFormat.FillType = FillType.Solid;
point.Format.Line.FillFormat.SolidFillColor.Color = Color.Gray;
point.Format.Line.Width = 3.0;
point.Format.Line.Style = LineStyle.ThinThick;
point.Format.Line.DashStyle = LineDashStyle.DashDot;

IChartDataPoint point1 = series.DataPoints[1];
point1.Format.Fill.FillType = FillType.Solid;
point1.Format.Fill.SolidFillColor.Color = Color.Brown;

// Sets the Sector border
point1.Format.Line.FillFormat.FillType = FillType.Solid;
point1.Format.Line.FillFormat.SolidFillColor.Color = Color.Blue;
point1.Format.Line.Width = 3.0;
point1.Format.Line.Style = LineStyle.Single;
point1.Format.Line.DashStyle = LineDashStyle.LargeDashDot;

IChartDataPoint point2 = series.DataPoints[2];
point2.Format.Fill.FillType = FillType.Solid;
point2.Format.Fill.SolidFillColor.Color = Color.Coral;

// Sets the Sector border
point2.Format.Line.FillFormat.FillType = FillType.Solid;
point2.Format.Line.FillFormat.SolidFillColor.Color = Color.Red;
point2.Format.Line.Width = 2.0;
point2.Format.Line.Style = LineStyle.ThinThin;
point2.Format.Line.DashStyle = LineDashStyle.LargeDashDotDot;

// Creates custom labels for each of categories for new series
IDataLabel lbl1 = series.DataPoints[0].Label;

// lbl.ShowCategoryName = true;
lbl1.DataLabelFormat.ShowValue = true;

IDataLabel lbl2 = series.DataPoints[1].Label;
lbl2.DataLabelFormat.ShowValue = true;
lbl2.DataLabelFormat.ShowLegendKey = true;
lbl2.DataLabelFormat.ShowPercentage = true;

IDataLabel lbl3 = series.DataPoints[2].Label;
lbl3.DataLabelFormat.ShowSeriesName = true;
lbl3.DataLabelFormat.ShowPercentage = true;

// Sets the series to show leader lines for the chart
series.Labels.DefaultDataLabelFormat.ShowLeaderLines = true;

// Sets the rotation angle for the pie chart sectors
chart.ChartData.SeriesGroups[0].FirstSliceAngle = 180;

// Saves the PPTX file to disk
presentation.Save("PieChart_out.pptx", SaveFormat.Pptx);

Creating Tree Map Charts

Tree map charts are best used for sales data when you want to show the relative size of data categories and (at the same time) quickly draw attention to items that are large contributors to each category.

  1. Create an instance of the Presentation class.
  2. Get a slide’s reference through its index.
  3. Add a chart with default data along with the desired type (in this case, ChartType.TreeMap).
  4. Access the chart data IChartDataWorkbook.
  5. Clear the default series and categories.
  6. Add new series and categories.
  7. Add new chart data for the chart series.
  8. Write the modified presentation to a PPTX file

This C# code shows you how to create a tree map chart:

using (Presentation presentation = new Presentation())
{
	IChart chart = presentation.Slides[0].Shapes.AddChart(Aspose.Slides.Charts.ChartType.Treemap, 50, 50, 500, 400);
	chart.ChartData.Categories.Clear();
	chart.ChartData.Series.Clear();

	IChartDataWorkbook wb = chart.ChartData.ChartDataWorkbook;

	wb.Clear(0);

	// Branch 1
	IChartCategory leaf = chart.ChartData.Categories.Add(wb.GetCell(0, "C1", "Leaf1"));
	leaf.GroupingLevels.SetGroupingItem(1, "Stem1");
	leaf.GroupingLevels.SetGroupingItem(2, "Branch1");

	chart.ChartData.Categories.Add(wb.GetCell(0, "C2", "Leaf2"));

	leaf = chart.ChartData.Categories.Add(wb.GetCell(0, "C3", "Leaf3"));
	leaf.GroupingLevels.SetGroupingItem(1, "Stem2");

	chart.ChartData.Categories.Add(wb.GetCell(0, "C4", "Leaf4"));


	// Branch 2
	leaf = chart.ChartData.Categories.Add(wb.GetCell(0, "C5", "Leaf5"));
	leaf.GroupingLevels.SetGroupingItem(1, "Stem3");
	leaf.GroupingLevels.SetGroupingItem(2, "Branch2");

	chart.ChartData.Categories.Add(wb.GetCell(0, "C6", "Leaf6"));

	leaf = chart.ChartData.Categories.Add(wb.GetCell(0, "C7", "Leaf7"));
	leaf.GroupingLevels.SetGroupingItem(1, "Stem4");

	chart.ChartData.Categories.Add(wb.GetCell(0, "C8", "Leaf8"));

	IChartSeries series = chart.ChartData.Series.Add(Aspose.Slides.Charts.ChartType.Treemap);
	series.Labels.DefaultDataLabelFormat.ShowCategoryName = true;
	series.DataPoints.AddDataPointForTreemapSeries(wb.GetCell(0, "D1", 4));
	series.DataPoints.AddDataPointForTreemapSeries(wb.GetCell(0, "D2", 5));
	series.DataPoints.AddDataPointForTreemapSeries(wb.GetCell(0, "D3", 3));
	series.DataPoints.AddDataPointForTreemapSeries(wb.GetCell(0, "D4", 6));
	series.DataPoints.AddDataPointForTreemapSeries(wb.GetCell(0, "D5", 9));
	series.DataPoints.AddDataPointForTreemapSeries(wb.GetCell(0, "D6", 9));
	series.DataPoints.AddDataPointForTreemapSeries(wb.GetCell(0, "D7", 4));
	series.DataPoints.AddDataPointForTreemapSeries(wb.GetCell(0, "D8", 3));

	series.ParentLabelLayout = ParentLabelLayoutType.Overlapping;

	presentation.Save("Treemap.pptx", SaveFormat.Pptx);
}

Creating Stock Charts

  1. Create an instance of the Presentation class.
  2. Get a slide’s reference through its index.
  3. Add a chart with default data along with the desired type (ChartType.OpenHighLowClose).
  4. Access the chart data IChartDataWorkbook.
  5. Clear the default series and categories.
  6. Add new series and categories.
  7. Add new chart data for the chart series.
  8. Specify HiLowLines format.
  9. Write the modified presentation to a PPTX file

Sample C# code used to create a stock chart:

using (Presentation pres = new Presentation())
{
	IChart chart = pres.Slides[0].Shapes.AddChart(ChartType.OpenHighLowClose, 50, 50, 600, 400, false);
    
	IChartDataWorkbook wb = chart.ChartData.ChartDataWorkbook;

	chart.ChartData.Categories.Add(wb.GetCell(0, 1, 0, "A"));
	chart.ChartData.Categories.Add(wb.GetCell(0, 2, 0, "B"));
	chart.ChartData.Categories.Add(wb.GetCell(0, 3, 0, "C"));

	chart.ChartData.Series.Add(wb.GetCell(0, 0, 1, "Open"), chart.Type);
	chart.ChartData.Series.Add(wb.GetCell(0, 0, 2, "High"), chart.Type);
	chart.ChartData.Series.Add(wb.GetCell(0, 0, 3, "Low"), chart.Type);
	chart.ChartData.Series.Add(wb.GetCell(0, 0, 4, "Close"), chart.Type);

	IChartSeries series = chart.ChartData.Series[0];

	series.DataPoints.AddDataPointForStockSeries(wb.GetCell(0, 1, 1, 72));
	series.DataPoints.AddDataPointForStockSeries(wb.GetCell(0, 2, 1, 25));
	series.DataPoints.AddDataPointForStockSeries(wb.GetCell(0, 3, 1, 38));

	series = chart.ChartData.Series[1];
	series.DataPoints.AddDataPointForStockSeries(wb.GetCell(0, 1, 2, 172));
	series.DataPoints.AddDataPointForStockSeries(wb.GetCell(0, 2, 2, 57));
	series.DataPoints.AddDataPointForStockSeries(wb.GetCell(0, 3, 2, 57));

	series = chart.ChartData.Series[2];
	series.DataPoints.AddDataPointForStockSeries(wb.GetCell(0, 1, 3, 12));
	series.DataPoints.AddDataPointForStockSeries(wb.GetCell(0, 2, 3, 12));
	series.DataPoints.AddDataPointForStockSeries(wb.GetCell(0, 3, 3, 13));

	series = chart.ChartData.Series[3];
	series.DataPoints.AddDataPointForStockSeries(wb.GetCell(0, 1, 4, 25));
	series.DataPoints.AddDataPointForStockSeries(wb.GetCell(0, 2, 4, 38));
	series.DataPoints.AddDataPointForStockSeries(wb.GetCell(0, 3, 4, 50));

	chart.ChartData.SeriesGroups[0].UpDownBars.HasUpDownBars = true;
	chart.ChartData.SeriesGroups[0].HiLowLinesFormat.Line.FillFormat.FillType = FillType.Solid;

	foreach (IChartSeries ser in chart.ChartData.Series)
	{
		ser.Format.Line.FillFormat.FillType = FillType.NoFill;
	}

	pres.Save("Stock-chart.pptx", SaveFormat.Pptx);
}

Creating Box and Whisker Charts

  1. Create an instance of the Presentation class.
  2. Get a slide’s reference through its index.
  3. Add a chart with default data along with the desired type (ChartType.BoxAndWhisker).
  4. Access the chart data IChartDataWorkbook.
  5. Clear the default series and categories.
  6. Add new series and categories.
  7. Add new chart data for the chart series.
  8. Write the modified presentation to a PPTX file

This C# code shows you how to create a box and whisker chart:

public static void Run()
{
	using (Presentation pres = new Presentation("test.pptx"))
	{
		IChart chart = pres.Slides[0].Shapes.AddChart(ChartType.BoxAndWhisker, 50, 50, 500, 400);
		chart.ChartData.Categories.Clear();
		chart.ChartData.Series.Clear();

		IChartDataWorkbook wb = chart.ChartData.ChartDataWorkbook;

		wb.Clear(0);

		chart.ChartData.Categories.Add(wb.GetCell(0, "A1", "Category 1"));
		chart.ChartData.Categories.Add(wb.GetCell(0, "A2", "Category 1"));
		chart.ChartData.Categories.Add(wb.GetCell(0, "A3", "Category 1"));
		chart.ChartData.Categories.Add(wb.GetCell(0, "A4", "Category 1"));
		chart.ChartData.Categories.Add(wb.GetCell(0, "A5", "Category 1"));
		chart.ChartData.Categories.Add(wb.GetCell(0, "A6", "Category 1"));

		IChartSeries series = chart.ChartData.Series.Add(ChartType.BoxAndWhisker);

		series.QuartileMethod = QuartileMethodType.Exclusive;
		series.ShowMeanLine = true;
		series.ShowMeanMarkers = true;
		series.ShowInnerPoints = true;
		series.ShowOutlierPoints = true;

		series.DataPoints.AddDataPointForBoxAndWhiskerSeries(wb.GetCell(0, "B1", 15));
		series.DataPoints.AddDataPointForBoxAndWhiskerSeries(wb.GetCell(0, "B2", 41));
		series.DataPoints.AddDataPointForBoxAndWhiskerSeries(wb.GetCell(0, "B3", 16));
		series.DataPoints.AddDataPointForBoxAndWhiskerSeries(wb.GetCell(0, "B4", 10));
		series.DataPoints.AddDataPointForBoxAndWhiskerSeries(wb.GetCell(0, "B5", 23));
		series.DataPoints.AddDataPointForBoxAndWhiskerSeries(wb.GetCell(0, "B6", 16));


		pres.Save("BoxAndWhisker.pptx", SaveFormat.Pptx);
	}
}

Creating Funnel Charts

  1. Create an instance of the Presentation class.
  2. Get a slide’s reference through its index.
  3. Add a chart with default data along with the desired type (ChartType.Funnel).
  4. Write the modified presentation to a PPTX file

This C# code shows you how to create a funnel chart:

public static void Run()
{
	using (Presentation pres = new Presentation("test.pptx"))
	{
		IChart chart = pres.Slides[0].Shapes.AddChart(ChartType.Funnel, 50, 50, 500, 400);
		chart.ChartData.Categories.Clear();
		chart.ChartData.Series.Clear();

		IChartDataWorkbook wb = chart.ChartData.ChartDataWorkbook;

		wb.Clear(0);

		chart.ChartData.Categories.Add(wb.GetCell(0, "A1", "Category 1"));
		chart.ChartData.Categories.Add(wb.GetCell(0, "A2", "Category 2"));
		chart.ChartData.Categories.Add(wb.GetCell(0, "A3", "Category 3"));
		chart.ChartData.Categories.Add(wb.GetCell(0, "A4", "Category 4"));
		chart.ChartData.Categories.Add(wb.GetCell(0, "A5", "Category 5"));
		chart.ChartData.Categories.Add(wb.GetCell(0, "A6", "Category 6"));

		IChartSeries series = chart.ChartData.Series.Add(ChartType.Funnel);

		series.DataPoints.AddDataPointForFunnelSeries(wb.GetCell(0, "B1", 50));
		series.DataPoints.AddDataPointForFunnelSeries(wb.GetCell(0, "B2", 100));
		series.DataPoints.AddDataPointForFunnelSeries(wb.GetCell(0, "B3", 200));
		series.DataPoints.AddDataPointForFunnelSeries(wb.GetCell(0, "B4", 300));
		series.DataPoints.AddDataPointForFunnelSeries(wb.GetCell(0, "B5", 400));
		series.DataPoints.AddDataPointForFunnelSeries(wb.GetCell(0, "B6", 500));

		pres.Save("Funnel.pptx", SaveFormat.Pptx);
	}
}

Creating Sunburst Charts

  1. Create an instance of the Presentation class.
  2. Get a slide’s reference through its index.
  3. Add a chart with default data along with the desired type (in this case, ChartType.sunburst).
  4. Write the modified presentation to a PPTX file

This C# code shows you how to create a sunburst chart:

public static void Run()
{
	using (Presentation pres = new Presentation("test.pptx"))
	{
		IChart chart = pres.Slides[0].Shapes.AddChart(ChartType.Sunburst, 50, 50, 500, 400);
		chart.ChartData.Categories.Clear();
		chart.ChartData.Series.Clear();

		IChartDataWorkbook wb = chart.ChartData.ChartDataWorkbook;

		wb.Clear(0);

		// Branch 1
		IChartCategory leaf = chart.ChartData.Categories.Add(wb.GetCell(0, "C1", "Leaf1"));
		leaf.GroupingLevels.SetGroupingItem(1, "Stem1");
		leaf.GroupingLevels.SetGroupingItem(2, "Branch1");

		chart.ChartData.Categories.Add(wb.GetCell(0, "C2", "Leaf2"));

		leaf = chart.ChartData.Categories.Add(wb.GetCell(0, "C3", "Leaf3"));
		leaf.GroupingLevels.SetGroupingItem(1, "Stem2");

		chart.ChartData.Categories.Add(wb.GetCell(0, "C4", "Leaf4"));

		// Branch 2
		leaf = chart.ChartData.Categories.Add(wb.GetCell(0, "C5", "Leaf5"));
		leaf.GroupingLevels.SetGroupingItem(1, "Stem3");
		leaf.GroupingLevels.SetGroupingItem(2, "Branch2");

		chart.ChartData.Categories.Add(wb.GetCell(0, "C6", "Leaf6"));

		leaf = chart.ChartData.Categories.Add(wb.GetCell(0, "C7", "Leaf7"));
		leaf.GroupingLevels.SetGroupingItem(1, "Stem4");

		chart.ChartData.Categories.Add(wb.GetCell(0, "C8", "Leaf8"));

		IChartSeries series = chart.ChartData.Series.Add(ChartType.Sunburst);
		series.Labels.DefaultDataLabelFormat.ShowCategoryName = true;
		series.DataPoints.AddDataPointForSunburstSeries(wb.GetCell(0, "D1", 4));
		series.DataPoints.AddDataPointForSunburstSeries(wb.GetCell(0, "D2", 5));
		series.DataPoints.AddDataPointForSunburstSeries(wb.GetCell(0, "D3", 3));
		series.DataPoints.AddDataPointForSunburstSeries(wb.GetCell(0, "D4", 6));
		series.DataPoints.AddDataPointForSunburstSeries(wb.GetCell(0, "D5", 9));
		series.DataPoints.AddDataPointForSunburstSeries(wb.GetCell(0, "D6", 9));
		series.DataPoints.AddDataPointForSunburstSeries(wb.GetCell(0, "D7", 4));
		series.DataPoints.AddDataPointForSunburstSeries(wb.GetCell(0, "D8", 3));

		pres.Save("Sunburst.pptx", SaveFormat.Pptx);
	}
}

Creating Histogram Charts

  1. Create an instance of the Presentation class.
  2. Get a slide’s reference through its index.
  3. Add some chart with some data and specify your preferred chart type (ChartType.Histogram in this case).
  4. Access the chart data IChartDataWorkbook.
  5. Clear the default series and categories.
  6. Add new series and categories.
  7. Write the modified presentation to a PPTX file

This C# code shows you how to create an histogram chart:

public static void Run()
{
	using (Presentation pres = new Presentation("test.pptx"))
	{
		IChart chart = pres.Slides[0].Shapes.AddChart(ChartType.Histogram, 50, 50, 500, 400);
		chart.ChartData.Categories.Clear();
		chart.ChartData.Series.Clear();

		IChartDataWorkbook wb = chart.ChartData.ChartDataWorkbook;

		wb.Clear(0);

		IChartSeries series = chart.ChartData.Series.Add(ChartType.Histogram);
		series.DataPoints.AddDataPointForHistogramSeries(wb.GetCell(0, "A1", 15));
		series.DataPoints.AddDataPointForHistogramSeries(wb.GetCell(0, "A2", -41));
		series.DataPoints.AddDataPointForHistogramSeries(wb.GetCell(0, "A3", 16));
		series.DataPoints.AddDataPointForHistogramSeries(wb.GetCell(0, "A4", 10));
		series.DataPoints.AddDataPointForHistogramSeries(wb.GetCell(0, "A5", -23));
		series.DataPoints.AddDataPointForHistogramSeries(wb.GetCell(0, "A6", 16));

		chart.Axes.HorizontalAxis.AggregationType = AxisAggregationType.Automatic;

		pres.Save("Histogram.pptx", SaveFormat.Pptx);
	}
}

Creating Radar Charts

  1. Create an instance of the Presentation class
  2. Get a slide’s reference through its index.
  3. Add a chart with some data and specify your preferred chart type (ChartType.Radar in this case).
  4. Write the modified presentation to a PPTX file

This C# code shows you how to create a radar chart:

using (Presentation presentation = new Presentation())
{
    presentation.Slides[0].Shapes.AddChart(ChartType.Radar, 20, 20, 400, 300);
    presentation.Save("Radar-chart.pptx", SaveFormat.Pptx);
}

Creating Multi Category Charts

  1. Create an instance of the Presentation class.
  2. Get a slide’s reference through its index.
  3. Add a chart with default data along with the desired type (ChartType.ClusteredColumn).
  4. Access the chart data IChartDataWorkbook.
  5. Clear the default series and categories.
  6. Add new series and categories.
  7. Add new chart data for the chart series.
  8. Write the modified presentation to a PPTX file.

This C# code shows you how to create a multicategory chart:

Presentation pres = new Presentation();
ISlide slide = pres.Slides[0];

IChart ch = pres.Slides[0].Shapes.AddChart(ChartType.ClusteredColumn, 100, 100, 600, 450);
ch.ChartData.Series.Clear();
ch.ChartData.Categories.Clear();


IChartDataWorkbook fact = ch.ChartData.ChartDataWorkbook;
fact.Clear(0);
int defaultWorksheetIndex = 0;

IChartCategory category = ch.ChartData.Categories.Add(fact.GetCell(0, "c2", "A"));
category.GroupingLevels.SetGroupingItem(1, "Group1");
category = ch.ChartData.Categories.Add(fact.GetCell(0, "c3", "B"));

category = ch.ChartData.Categories.Add(fact.GetCell(0, "c4", "C"));
category.GroupingLevels.SetGroupingItem(1, "Group2");
category = ch.ChartData.Categories.Add(fact.GetCell(0, "c5", "D"));

category = ch.ChartData.Categories.Add(fact.GetCell(0, "c6", "E"));
category.GroupingLevels.SetGroupingItem(1, "Group3");
category = ch.ChartData.Categories.Add(fact.GetCell(0, "c7", "F"));

category = ch.ChartData.Categories.Add(fact.GetCell(0, "c8", "G"));
category.GroupingLevels.SetGroupingItem(1, "Group4");
category = ch.ChartData.Categories.Add(fact.GetCell(0, "c9", "H"));

// Adds the Series
IChartSeries series = ch.ChartData.Series.Add(fact.GetCell(0, "D1", "Series 1"),
    ChartType.ClusteredColumn);

series.DataPoints.AddDataPointForBarSeries(fact.GetCell(defaultWorksheetIndex, "D2", 10));
series.DataPoints.AddDataPointForBarSeries(fact.GetCell(defaultWorksheetIndex, "D3", 20));
series.DataPoints.AddDataPointForBarSeries(fact.GetCell(defaultWorksheetIndex, "D4", 30));
series.DataPoints.AddDataPointForBarSeries(fact.GetCell(defaultWorksheetIndex, "D5", 40));
series.DataPoints.AddDataPointForBarSeries(fact.GetCell(defaultWorksheetIndex, "D6", 50));
series.DataPoints.AddDataPointForBarSeries(fact.GetCell(defaultWorksheetIndex, "D7", 60));
series.DataPoints.AddDataPointForBarSeries(fact.GetCell(defaultWorksheetIndex, "D8", 70));
series.DataPoints.AddDataPointForBarSeries(fact.GetCell(defaultWorksheetIndex, "D9", 80));
// Save presentation with chart
pres.Save("AsposeChart_out.pptx", Aspose.Slides.Export.SaveFormat.Pptx);

Updating Charts

  1. Instantiate a Presentation class that represents the presentation containing the chart.
  2. Get a slide’s reference through its index.
  3. Traverse through all shapes to find the desired chart.
  4. Access the chart data worksheet.
  5. Modify the chart data series data by changing series values.
  6. Add a new series and populate the data in it.
  7. Write the modified presentation as a PPTX file.

This C# code shows you how to update a chart:

// Instantiates a Presentation class that represents a PPTX file
Presentation pres = new Presentation("ExistingChart.pptx");

// Accesses the first slideMarker
ISlide sld = pres.Slides[0];

// Adds a chart with default data
IChart chart = (IChart)sld.Shapes[0];

// Sets the index for the chart data sheet
int defaultWorksheetIndex = 0;

// Gets the chart data worksheet
IChartDataWorkbook fact = chart.ChartData.ChartDataWorkbook;


// Changes the chart Category Name
fact.GetCell(defaultWorksheetIndex, 1, 0, "Modified Category 1");
fact.GetCell(defaultWorksheetIndex, 2, 0, "Modified Category 2");


// Takes the first chart series
IChartSeries series = chart.ChartData.Series[0];

// Updates the series data
fact.GetCell(defaultWorksheetIndex, 0, 1, "New_Series1");// Modifying series name
series.DataPoints[0].Value.Data = 90;
series.DataPoints[1].Value.Data = 123;
series.DataPoints[2].Value.Data = 44;

// Take Second chart series
series = chart.ChartData.Series[1];

// Now updating series data
fact.GetCell(defaultWorksheetIndex, 0, 2, "New_Series2");// Modifying series name
series.DataPoints[0].Value.Data = 23;
series.DataPoints[1].Value.Data = 67;
series.DataPoints[2].Value.Data = 99;


// Now, Adding a new series
chart.ChartData.Series.Add(fact.GetCell(defaultWorksheetIndex, 0, 3, "Series 3"), chart.Type);

// Take 3rd chart series
series = chart.ChartData.Series[2];

// Now populating series data
series.DataPoints.AddDataPointForBarSeries(fact.GetCell(defaultWorksheetIndex, 1, 3, 20));
series.DataPoints.AddDataPointForBarSeries(fact.GetCell(defaultWorksheetIndex, 2, 3, 50));
series.DataPoints.AddDataPointForBarSeries(fact.GetCell(defaultWorksheetIndex, 3, 3, 30));

chart.Type = ChartType.ClusteredCylinder;

// Save presentation with chart
pres.Save("AsposeChartModified_out.pptx", SaveFormat.Pptx);

Setting Data Range for Charts

  1. Instantiate a Presentation class that represents the presentation containing the chart.
  2. Get a slide’s reference through its index.
  3. Traverse through all shapes to find the desired chart.
  4. Access the chart data and set the range.
  5. Save the modified presentation as a PPTX file.

This C# code shows you how to set the data range for a chart:

// Instantiates a Presentation class that represents a PPTX file
Presentation presentation = new Presentation("ExistingChart.pptx");

// Accesses the first slideMarker and adds a chart with default data
ISlide slide = presentation.Slides[0];
IChart chart = (IChart)slide.Shapes[0];
chart.ChartData.SetRange("Sheet1!A1:B4");
presentation.Save("SetDataRange_out.pptx", SaveFormat.Pptx);

Using Default Markers in Charts

When you use a default marker in charts, each chart series get different default marker symbols automatically.

This C# code shows you how to set a chart series market automatically:

using (Presentation pres = new Presentation())
{
    ISlide slide = pres.Slides[0];
    IChart chart = slide.Shapes.AddChart(ChartType.LineWithMarkers, 10, 10, 400, 400);

    chart.ChartData.Series.Clear();
    chart.ChartData.Categories.Clear();

    IChartDataWorkbook fact = chart.ChartData.ChartDataWorkbook;
    chart.ChartData.Series.Add(fact.GetCell(0, 0, 1, "Series 1"), chart.Type);
    IChartSeries series = chart.ChartData.Series[0];

    chart.ChartData.Categories.Add(fact.GetCell(0, 1, 0, "C1"));
    series.DataPoints.AddDataPointForLineSeries(fact.GetCell(0, 1, 1, 24));
    chart.ChartData.Categories.Add(fact.GetCell(0, 2, 0, "C2"));
    series.DataPoints.AddDataPointForLineSeries(fact.GetCell(0, 2, 1, 23));
    chart.ChartData.Categories.Add(fact.GetCell(0, 3, 0, "C3"));
    series.DataPoints.AddDataPointForLineSeries(fact.GetCell(0, 3, 1, -10));
    chart.ChartData.Categories.Add(fact.GetCell(0, 4, 0, "C4"));
    series.DataPoints.AddDataPointForLineSeries(fact.GetCell(0, 4, 1, null));

    chart.ChartData.Series.Add(fact.GetCell(0, 0, 2, "Series 2"), chart.Type);
    // Takes the second chart series
    IChartSeries series2 = chart.ChartData.Series[1];

    // Populates the series data
    series2.DataPoints.AddDataPointForLineSeries(fact.GetCell(0, 1, 2, 30));
    series2.DataPoints.AddDataPointForLineSeries(fact.GetCell(0, 2, 2, 10));
    series2.DataPoints.AddDataPointForLineSeries(fact.GetCell(0, 3, 2, 60));
    series2.DataPoints.AddDataPointForLineSeries(fact.GetCell(0, 4, 2, 40));

    chart.HasLegend = true;
    chart.Legend.Overlay = false;

    pres.Save("DefaultMarkersInChart.pptx", SaveFormat.Pptx);
}