C#实现将PowerPoint演示文稿高效转换为PDF格式的两种方法详解

using Microsoft.Office.Interop.PowerPoint;
using System;
using System.IO;

public static void ConvertPptToPdf(string pptPath, string pdfPath)
{
    if (!File.Exists(pptPath))
        throw new FileNotFoundException("源 PPT 文件不存在。", pptPath);

    Application pptApp = null;
    Presentation presentation = null;

    try
    {
        pptApp = new Application();
        presentation = pptApp.Presentations.Open(pptPath, 
            WithWindow: MsoTriState.msoFalse); // 不显示窗口

        presentation.ExportAsFixedFormat(
            Path: pdfPath,
            Type: PpFixedFormatType.ppFixedFormatTypePDF,
            Intent: PpFixedFormatIntent.ppFixedFormatIntentScreen,
            FrameSlides: MsoTriState.msoTrue,
            HandoutOrder: PpPrintHandoutOrder.ppPrintHandoutVerticalFirst,
            OutputType: PpPrintOutputType.ppPrintOutputSlides,
            PrintHiddenSlides: MsoTriState.msoTrue
        );
    }
    finally
    {
        presentation?.Close();
        pptApp?.Quit();

        // 释放 COM 对象（重要！）
        System.Runtime.InteropServices.Marshal.ReleaseComObject(presentation);
        System.Runtime.InteropServices.Marshal.ReleaseComObject(pptApp);
    }
}

Install-Package Aspose.Slides

using Aspose.Slides;
using System;

public static void ConvertPptToPdfWithAspose(string pptPath, string pdfPath)
{
    using (var presentation = new Presentation(pptPath))
    {
        presentation.Save(pdfPath, Aspose.Slides.Export.SaveFormat.Pdf);
    }
}