如何在 .NET 中将 PDF 转换为 PNG

using Aspose.Pdf.Plugins;
using System.IO;

string inputDir = @"C:\Docs\PDFs";
string outputDir = @"C:\Docs\PNGS";
Directory.CreateDirectory(outputDir);

string[] pdfFiles = Directory.GetFiles(inputDir, "*.pdf");
int processed = 0;

foreach (var pdfFile in pdfFiles)
{
    string baseName = Path.GetFileNameWithoutExtension(pdfFile);
    var converter = new Png();
    var options = new PngOptions();
    options.AddInput(new FileDataSource(pdfFile));
    // Optional: Set output resolution
    options.OutputResolution = 200;

    var resultContainer = converter.Process(options);
    int pageNum = 1;
    foreach (var result in resultContainer.ResultCollection)
    {
        string imgOut = Path.Combine(outputDir, $"{baseName}_Page{pageNum}.png");
        File.WriteAllBytes(imgOut, result.ToFile());
        pageNum++;
    }
    processed++;
    Console.WriteLine($"Converted {pdfFile} to PNGs");
}
Console.WriteLine($"Done! Total PDFs processed: {processed}");