Visualizing trends over time is a core requirement for many business reports. A Line chart provides a clear, visual representation of data series across a continuous axis, making it ideal for showing performance, sales, or any time‑based data. In this guide we’ll show you how to generate Line charts programmatically using Aspose.Cells for .NET and C#.

This article covers the following topics:

C# Excel Library to Create Line Charts

Aspose.Cells for .NET is a comprehensive API that enables developers to work with Excel files without Microsoft Office. It supports creating, editing, and customizing charts of all types, including Line charts. Key advantages include:

  • Rich API surface – Full control over chart types, series, axes, and formatting.
  • No COM dependencies – Works on any platform that supports .NET.
  • High performance – Efficient handling of large workbooks.
  • Multi‑format support – Read/write XLSX, XLS, CSV, PDF, and more.

Getting Started

  1. Download the latest Aspose.Cells for .NET from the releases page.

  2. Install via NuGet:

    PM> Install-Package Aspose.Cells

  3. Add a reference to Aspose.Cells in your project.

Create a Line Chart in Excel using C#

Below are two practical examples:

  1. Simple single‑series Line chart – ideal for a quick trend visualisation.
  2. Multi‑series Line chart with secondary axis – useful when comparing datasets with different scales.

Both examples are complete, compile‑ready C# programs.

Example 1 – Simple Single‑Series Line Chart

Explanation

  • The workbook is created in memory and populated with month & sales data.
  • ChartType.Line creates a basic line chart.
  • NSeries.Add defines the data series; CategoryData assigns the X‑axis labels.
  • The resulting file SimpleLineChart.xlsx contains a fully formatted line chart.

Example 2 – Multi‑Series Line Chart with Secondary Axis

Key Points

  • Two series are added: Revenue (primary axis) and Profit% (secondary axis) to illustrate different scales.
  • PlotOnSecondAxis = true moves the second series to the right‑hand Y‑axis.
  • Marker customization makes the secondary series visually distinct.
  • The final file MultiSeriesLineChart.xlsx contains a fully functional multi‑series line chart.

Get a Free License

Want to try Aspose.Cells without limitations? Grab a temporary free license from the Aspose temporary license page. This license removes evaluation watermarks and lets you explore all charting features.

Free Resources

Enhance your Excel automation skills with these official resources:

Conclusion

Creating Line charts with Aspose.Cells for .NET is straightforward and highly customizable. Whether you need a quick single‑series trend line or a sophisticated multi‑series chart with secondary axes, the library provides full control through an intuitive API. Use the provided code samples as a starting point and adapt them to your specific reporting requirements.

If you encounter any issues or have questions, feel free to ask for help on our free support forum.

See Also