C# PDF转图片

以下两种方式，都支持跨平台。

方法一：IronPDF

1、引用IronPDF

2、调用代码

1 using PdfDocument = IronPdf.PdfDocument;
2 var pdf = PdfDocument.FromFile("E:\\1\\v1a1.pdf");
3 // Extract all pages to a folder as image files
4 pdf.RasterizeToImageFiles("E:\\1\\3.png");
5 //Dimensions and page ranges may be specified
6 pdf.RasterizeToImageFiles("E:\\1\\4.png", 100, 80);
7 Console.WriteLine("Hello, World!");

方法二：Magick

1、引用Magick.NET-Q16-AnyCPU、还需要额外安装Ghostscript。

2、调用代码

ConvertPdfToImages("E:\\1\\v1a1.pdf", "E:\\1\\v1a1.png");

void ConvertPdfToImages(string pdfFilePath, string outputFolder)
{
    //using (var imageCollection = new MagickImageCollection())
    //{
    //    imageCollection.Read(pdfFilePath);
    //    var image = imageCollection[0];
    //    image.Write(outputFolder);
    //}
    MagickReadSettings settings = new MagickReadSettings();
    settings.Density = new Density(45, 45); //设置质量
    using (MagickImageCollection images = new MagickImageCollection())
    {
        try
        {
            images.Read(pdfFilePath, settings);
            for (int i = 0; i < images.Count; i++)
            {
                MagickImage image = (MagickImage)images[i];
                image.Format = MagickFormat.Png;
                //image.Write("E:\\1\\v2a4.png");
                image.Write(outputFolder);
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
        }
    }
}