世俱杯 2025

本篇教程演示在LEADTOOLS中如何将HTML文件转换为PDF并与PDF合并。

点击查看LEADTOOLS产品

在这个示例中，我们采用不是标准8.5 x 11大小的HTML文件，先将HTML文件转换为PDF并修复大小调整，然后将其与8.5 x 11的PDF合并。

这允许对文件进行转换和大小调整，以使它们与作为PDF合并的文件的大小相匹配。尺寸说明在LEADTOOLS在线文档中的中进行了说明。

注意：当您使用下面的项目时，您需要将Leadtools.Pdf.Utilities.dll包含在输出目录中。

可以从这里复制：

C：\ LEADTOOLS 20 \ Bin \ Dotnet4 \ x64

并在这里添加：

.... \ convertCombineHtmlToPDF_20 \ bin \ x64 \ Debug

C#代码：

using System;
using System.IO;

using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using Leadtools.Pdf;

namespace convertCombineHtmlToPDF_20
{
    class Program
    {
        static void Main(string[] args)
        {
            string licenseFilePath = @"C:\LEADTOOLS 20\Common\License\LEADTOOLS.LIC";
            string keyFileValue = File.ReadAllText(@"C:\LEADTOOLS 20\Common\License\LEADTOOLS.LIC.KEY");

            RasterSupport.SetLicense(licenseFilePath, keyFileValue);
            
            //Step 1: Convert HTML file to PDF 
            string srcFileHTML = @"...\readme.html"; //point to the HTML file
            string srcFilePDF = @"...\Leadtools.pdf"; //point to the PDF file
            string outPath = @"...\readmeToPDF_Test.pdf"; //point to the output after convert location
            string mergeOutPath = @"...\merge_Test.pdf"; //point to the output after merge location

            RasterCodecs codecs = new RasterCodecs();

            //Shows the PDF Width, Height, X Resolution, and Y Resolution
            RasterImage imagePDF = codecs.Load(srcFilePDF);
            Console.WriteLine("PDF Image Width: {0}", imagePDF.Width);
            Console.WriteLine("PDF Image Width: {0}", imagePDF.Height);
            
            Console.WriteLine("PDF X Resolution: {0}", imagePDF.XResolution);
            Console.WriteLine("PDF Y Resolution: {0}", imagePDF.YResolution);

            //Shows the HTML Width, Height, X Resolution, and Y Resolution
            RasterImage imageHTML = codecs.Load(srcFileHTML);
            Console.WriteLine("HTML Image Width: {0}", imageHTML.Width);
            Console.WriteLine("HTML Image Width: {0}", imageHTML.Height);

            Console.WriteLine("HTML X Resolution: {0}", imageHTML.XResolution);
            Console.WriteLine("HTML Y Resolution: {0}", imageHTML.YResolution);

            //Compares the Width and Height of the HTML to the 8.5 x 11 PDF
            //Numeric Values to set the HTML file to 
            // imageHTML.Width = 1275
            // imageHTML.Height = 1650
            if (imageHTML.Width != imagePDF.Width || imageHTML.Height != imagePDF.Height)
            {
                RasterImage destImage = new RasterImage(
                    RasterMemoryFlags.Conventional,
                    imagePDF.Width,
                    imagePDF.Height,
                    imageHTML.BitsPerPixel,
                    imageHTML.Order,
                    imageHTML.ViewPerspective,
                    imageHTML.GetPalette(),
                    IntPtr.Zero,
                    0);

                ResizeCommand command = new ResizeCommand();
                command.DestinationImage = destImage;
                command.Flags = RasterSizeFlags.Bicubic;
                command.Run(imageHTML);
                
                codecs.Save(destImage, outPath, RasterImageFormat.RasPdf, 0);
            }
            
            //Shows the outPut HTML file to make sure the Width and Height match the PDF
            RasterImage imageConvertedHTML = codecs.Load(outPath);
            Console.WriteLine("HTML Image Width: {0}", imageConvertedHTML.Width);
            Console.WriteLine("HTML Image Width: {0}", imageConvertedHTML.Height);
            
            //Step 2: Merge the two PDF files
            PDFFile pdfFile = new PDFFile(srcFilePDF);
            pdfFile.MergeWith(new string[] {outPath}, mergeOutPath);
            
            codecs.Dispose();
            Console.ReadLine();
        }
    }
}

文件附件：

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