This sample code converts Excel chart to JPG in C#. For more details, refer to https://kb.aspose.com/cells/net/how-to-convert-excel-chart-to-jpg-in-csharp-without-interop/

How to convert Excel chart to image in CSharp.cs

using Aspose.Cells;
using Aspose.Cells.Charts;
using Aspose.Cells.Rendering;
namespace ConvertExcelChartToJPGInCSharp
{
    class Program
    {
        static void Main(string[] args)
        {
            // Initialize license object
            License license = new License();
            
            // Set license by providing path to license file
            license.SetLicense("Aspose.Cells.lic");
            
            //Load the workbook containing the chart
            Workbook ChartToImageWorkbook = new Workbook("ExcelChartFile.xlsx");

            //Access chart object that is to be rendered to image 
            Chart chart = ChartToImageWorkbook.Worksheets[0].Charts[0];

            //Set image type options using ImageOrPrintOptions
            ImageOrPrintOptions imageOrPrintOptions = new ImageOrPrintOptions();
            imageOrPrintOptions.ImageType = Aspose.Cells.Drawing.ImageType.Jpeg;

            //Save chart as JPEG image
            chart.ToImage("ExcelChartToJPG.jpg", imageOrPrintOptions);
        }
    }
}