C#代码实现方式将PDF转换为PDF线性化格式实用指南

PM> Install-Package Spire.PDF

using Spire.Pdf.Conversion;

namespace ConvertPdfToLinearized
{
    class Program
    {
        static void Main(string[] args)
        {
            // 加载 PDF 文件
            PdfToLinearizedPdfConverter converter = new PdfToLinearizedPdfConverter("Sample.pdf");
            // 将文件转换为线性化 PDF
            converter.ToLinearizedPdf("Linearized.pdf");
        }
    }
}

using Spire.Pdf.Conversion;
class Program
{
    static void Main(string[] args)
    {
        // 1. 加载 PDF 文件
        var converter = new PdfToLinearizedPdfConverter("input.pdf");
        // 2. 转换为线性化 PDF
        converter.ToLinearizedPdf("output.pdf");
        // 3. 验证结果：在 Adobe Acrobat 中查看文档属性，“Fast Web View”值应为“Yes”
        //    表示转换成功[reference:12]
    }
}

using IronPdf;
class Program
{
    static void Main(string[] args)
    {
        // 1. 加载 PDF 文档
        var pdfDocument = PdfDocument.FromFile("input.pdf");
        // 2. 保存为线性化 PDF
        pdfDocument.SaveAsLinearized("output.pdf");
        // 这对于需要从内存流或数据库中处理 PDF 的场景非常有用[reference:14]
    }
}

using Aspose.Pdf;
class Program
{
    static void Main(string[] args)
    {
        // 1. 打开文档
        using (var document = new Document("input.pdf"))
        {
            // 2. 优化文档（线性化）
            //    此方法会重新组织文档结构以实现快速 Web 预览[reference:16]
            document.Optimize();
            // 3. 保存优化后的文档
            document.Save("output.pdf");
        }
    }
}

using System.Text;
using System.Net.Http;
using System.IO;
using System.Threading.Tasks;
class Program
{
    static async Task Main(string[] args)
    {
        var apiKey = "YOUR_API_KEY";
        var filePath = "input.pdf";
        using (var httpClient = new HttpClient { BaseAddress = new Uri("https://api.pdfrest.com") })
        {
            using (var request = new HttpRequestMessage(HttpMethod.Post, "linearized-pdf"))
            {
                request.Headers.TryAddWithoutValidation("Api-Key", apiKey);
                var multipartContent = new MultipartFormDataContent();
                var fileBytes = File.ReadAllBytes(filePath);
                var byteContent = new ByteArrayContent(fileBytes);
                byteContent.Headers.TryAddWithoutValidation("Content-Type", "application/pdf");
                multipartContent.Add(byteContent, "file", "input.pdf");
                request.Content = multipartContent;
                var response = await httpClient.SendAsync(request);
                var result = await response.Content.ReadAsStringAsync();
                // 处理响应，保存返回的线性化 PDF 文件
                Console.WriteLine(result);
            }
        }
    }
}