C#使用Spire.XLS实现将Excel转换成高质量JPG

using Spire.Xls;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;

namespace Convert
{
    class Program
    {
        static void Main(string[] args)
        {
            Workbook workbook = new Workbook();
            workbook.LoadFromFile("Input.xlsx", ExcelVersion.Version2013);
            Worksheet worksheet = workbook.Worksheets[0];

            using (MemoryStream ms = new MemoryStream())
            {
                worksheet.ToEMFStream(ms, 1, 1, worksheet.LastRow, worksheet.LastColumn);
                Image image = Image.FromStream(ms);
                Bitmap images = ResetResolution(image as Metafile, 300);
                images.Save("Result.jpg", ImageFormat.Jpeg);
            }
        }

        private static Bitmap ResetResolution(Metafile mf, float resolution)
        {
            int width = (int)(mf.Width * resolution / mf.HorizontalResolution);
            int height = (int)(mf.Height * resolution / mf.VerticalResolution);
            Bitmap bmp = new Bitmap(width, height);
            bmp.SetResolution(resolution, resolution);
            Graphics g = Graphics.FromImage(bmp);
            g.DrawImage(mf, 0, 0);
            g.Dispose();
            return bmp;
        }
    }
}

using Aspose.Cells;
using Aspose.Cells.Rendering;
using System.Drawing;
class Program
{
    static void Main()
    {
        // 1. 加载 Excel 文件
        Workbook workbook = new Workbook("测试.xlsx");
        Worksheet worksheet = workbook.Worksheets[0];
        // 2. 配置图像渲染选项
        ImageOrPrintOptions options = new ImageOrPrintOptions();
        options.ImageType = Drawing.ImageType.Jpeg;
        options.OnePagePerSheet = true;
        // 可选：设置高分辨率，确保高质量
        options.HorizontalResolution = 300;
        options.VerticalResolution = 300;
        // 3. 渲染工作表
        SheetRender render = new SheetRender(worksheet, options);
        Bitmap bitmap = render.ToImage(0);
        // 4. 保存为 JPG 图片
        bitmap.Save("输出结果.jpg");
    }
}