# Customize Chart Data Tables in Presentations in .NET

> Customize chart data tables in .NET for PPT and PPTX with Aspose.Slides to boost efficiency and appeal in presentations.

Source: https://docs.aspose.com/slides/net/chart-data-table/
Updated: 2026-08-05


## **Overview**

This article explains how to work with chart data tables in Aspose.Slides. It shows how to display a data table for a chart and customize its text formatting by setting font properties such as bold style and font height. The example demonstrates loading a presentation, adding a chart, enabling the chart data table, applying font settings, and saving the updated presentation.

It also includes brief answers to common questions about showing legend keys in a chart data table, preserving the data table during export, working with charts loaded from existing presentations or templates, and identifying charts where the data table is enabled.

## **Set Font Properties for a Chart Data Table**
Aspose.Slides for .NET provides support for displaying a data table on a chart and setting the font properties of its text. 

1. Instantiate [Presentation](https://reference.aspose.com/slides/net/aspose.slides/presentation) class object.
1. Add chart on the slide.
1. set chart table.
1. Set font height.
1. Save modified presentation.

 Below sample example is given. 

```c#
using Aspose.Slides;
using Aspose.Slides.Charts;
using Aspose.Slides.Export;

using (Presentation pres = new Presentation("test.pptx"))
{
	IChart chart = pres.Slides[0].Shapes.AddChart(ChartType.ClusteredColumn, 50, 50, 600, 400);

	chart.HasDataTable = true;

	chart.ChartDataTable.TextFormat.PortionFormat.FontBold = NullableBool.True;
	chart.ChartDataTable.TextFormat.PortionFormat.FontHeight = 20;

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

## **FAQ**

### Can I show small legend keys next to the values in the chart’s data table?

Yes. The data table supports [legend keys](https://reference.aspose.com/slides/net/aspose.slides.charts/datatable/showlegendkey/), and you can turn them on or off.

### Will the data table be preserved when exporting the presentation to PDF, HTML, or images?

Yes. Aspose.Slides renders the chart as part of the slide, so the exported [PDF](/slides/net/convert-powerpoint-to-pdf/)/[HTML](/slides/net/convert-powerpoint-to-html/)/[image](/slides/net/convert-powerpoint-to-png/) includes the chart with its data table.

### Are data tables supported for charts that come from a template file?

Yes. For any chart loaded from an existing presentation or template, you can check and change whether a data table [is shown](https://reference.aspose.com/slides/net/aspose.slides.charts/chart/hasdatatable/) using the chart’s properties.

### How can I quickly find which charts in a file have the data table enabled?

Inspect each chart’s property that indicates whether the data table [is shown](https://reference.aspose.com/slides/net/aspose.slides.charts/chart/hasdatatable/) and iterate through the slides to identify the charts where it is enabled.