Spire.Doc是一款专门对 Word 文档进行操作的 类库。在于帮助开发人员无需安装 Microsoft Word情况下,轻松快捷高效地创建、编辑、转换和打印 Microsoft Word 文档。拥有近10年专业开发经验Spire系列办公文档开发工具,专注于创建、编辑、转换和打印Word/PDF/Excel等格式文件处理,小巧便捷。
将 HTML 内容转换为 PDF 具有许多优势,包括能够离线阅读,以及以高保真度保留内容和格式。Spire.PDF提供了两种HTML转PDF的方法,一种是使用QT Web插件,另一种是不使用插件。我们建议您使用 QT 插件进行转换。
以下部分演示了如何使用Spire.PDF for .NET使用或不使用 QT 插件将HTML 网页(URL)或HTML 字符串呈现为 PDF 文档。
安装适用于 .NET 的 Spire.PDF
首先,您需要将包含在 Spire.PDF for.NET 包中的 DLL 文件添加为您的 .NET 项目中的引用。DLL 文件可以从此链接下载或通过NuGet安装
PM> Install-Package Spire.PDF
下载插件
如果您选择插件方式,请从以下链接下载适合您操作系统的插件。
将包解压缩到磁盘上的某个位置以获取“plugins”文件夹。在本例中,我们将插件保存在“F:\Libraries\Plugin\plugins-windows-x64\plugins”路径下。
此外,我们建议您将项目的“平台目标”相应地设置为 x64 或 x86。
使用 QT 插件将 URL 转换为 PDF
以下是使用带 QT 插件的 Spire.PDF 将 URL 转换为 PDF 的步骤。
【C#】
using Spire.Pdf.Graphics; using Spire.Pdf.HtmlConverter.Qt; using System.Drawing; namespace ConvertUrlToPdf { class Program { static void Main(string[] args) { //Specify the URL path string url = "https://www.wikipedia.org/"; //Specify the output file path string fileName = "UrlToPdf.pdf"; //Specify the plugin path string pluginPath = "F:\\Libraries\\Plugin\\plugins-windows-x64\\plugins"; //Set the plugin path HtmlConverter.PluginPath = pluginPath; //Convert URL to PDF HtmlConverter.Convert(url, fileName, true, 100000, new Size(1080, 1000), new PdfMargins(0)); } } }
【VB.NET】
Imports Spire.Pdf.Graphics Imports Spire.Pdf.HtmlConverter.Qt Imports System.Drawing Namespace ConvertUrlToPdf Class Program Shared Sub Main(ByVal args() As String) 'Specify the URL path Dim url As String = "https://www.wikipedia.org/" 'Specify the output file path Dim fileName As String = "UrlToPdf.pdf" 'Specify the plugin path Dim pluginPath As String = "F:\\Libraries\\Plugin\\plugins-windows-x64\\plugins" 'Set the plugin path HtmlConverter.PluginPath = pluginPath 'Convert URL to PDF HtmlConverter.Convert(url, fileName, True, 100000, New Size(1080, 1000), New PdfMargins(0)) End Sub End Class End Namespace
使用 QT 插件将 HTML 字符串转换为 PDF
以下是使用带 QT 插件的 Spire.PDF 将 HTML 字符串转换为 PDF 的步骤。
注意:只有内联 CSS 样式和内部 CSS 样式才能在 PDF 上正确呈现。如果您有外部 CSS 样式表,请将其转换为内联或内部 CSS 样式。
【C#】
using System.IO; using Spire.Pdf.HtmlConverter.Qt; using System.Drawing; using Spire.Pdf.Graphics; namespace ConvertHtmlStringToPdfWithPlugin { class Program { static void Main(string[] args) { //Get the HTML string from a .html file string htmlString = File.ReadAllText(@"C:\Users\Administrator\Desktop\Document\Html\Sample.html"); //Specify the output file path string fileName = "HtmlStringToPdf.pdf"; //Specify the plugin path string pluginPath = "F:\\Libraries\\Plugin\\plugins-windows-x64\\plugins"; //Set plugin path HtmlConverter.PluginPath = pluginPath; //Convert HTML string to PDF HtmlConverter.Convert(htmlString, fileName, true, 100000, new Size(1080, 1000), new PdfMargins(0), Spire.Pdf.HtmlConverter.LoadHtmlType.SourceCode); } } }
【VB.NET】
Imports System.IO Imports Spire.Pdf.HtmlConverter.Qt Imports System.Drawing Imports Spire.Pdf.Graphics Namespace ConvertHtmlStringToPdfWithPlugin Class Program Shared Sub Main(ByVal args() As String) 'Get the HTML string from a .html file Dim htmlString As String = File.ReadAllText("C:\Users\Administrator\Desktop\Document\Html\Sample.html") 'Specify the output file path Dim fileName As String = "HtmlStringToPdf.pdf" 'Specify the plugin path Dim pluginPath As String = "F:\\Libraries\\Plugin\\plugins-windows-x64\\plugins" 'Set plugin path HtmlConverter.PluginPath = pluginPath 'Convert URL to PDF HtmlConverter.Convert(htmlString, fileName, True, 100000, New Size(1080, 1000), New PdfMargins(0), Spire.Pdf.HtmlConverter.LoadHtmlType.SourceCode) End Sub End Class End Namespace
无需插件即可将 URL 转换为 PDF
以下是使用无插件的 Spire.PDF 将 URL 转换为 PDF 的步骤。
【C#】
using System; using Spire.Pdf; using System.Threading; using Spire.Pdf.HtmlConverter; using System.Drawing; namespace ConverUrlToPdfWithoutPlugin { class Program { static void Main(string[] args) { //Create a PdfDocument object PdfDocument doc = new PdfDocument(); //Create a PdfPageSettings object PdfPageSettings setting = new PdfPageSettings(); //Save page size and margins through the object setting.Size = new SizeF(1000, 1000); setting.Margins = new Spire.Pdf.Graphics.PdfMargins(20); //Create a PdfHtmlLayoutFormat object PdfHtmlLayoutFormat htmlLayoutFormat = new PdfHtmlLayoutFormat(); //Set IsWaiting property to true htmlLayoutFormat.IsWaiting = true; //Specific the URL path to convert String url = "https://www.wikipedia.org/"; //Load HTML from a URL path using LoadFromHTML method Thread thread = new Thread(() => { doc.LoadFromHTML(url, true, true, false, setting, htmlLayoutFormat); }); thread.SetApartmentState(ApartmentState.STA); thread.Start(); thread.Join(); //Save the document to a PDF file doc.SaveToFile("UrlToPdf.pdf"); doc.Close(); } } }
【VB.NET】
Imports System Imports Spire.Pdf Imports System.Threading Imports Spire.Pdf.HtmlConverter Imports System.Drawing Namespace ConverUrlToPdfWithoutPlugin Class Program Shared Sub Main(ByVal args() As String) 'Create a PdfDocument object Dim doc As PdfDocument = New PdfDocument() 'Create a PdfPageSettings object Dim setting As PdfPageSettings = New PdfPageSettings() 'Save page size and margins through the object setting.Size = New SizeF(1000, 1000) setting.Margins = New Spire.Pdf.Graphics.PdfMargins(20) 'Create a PdfHtmlLayoutFormat object Dim htmlLayoutFormat As PdfHtmlLayoutFormat = New PdfHtmlLayoutFormat() 'Set IsWaiting property to true htmlLayoutFormat.IsWaiting = True 'Specific the URL path to convert Dim url As String = "https://www.wikipedia.org/" 'Load HTML from a URL path using LoadFromHTML method Thread thread = New Thread(() => { doc.LoadFromHTML(url, True, True, False, setting, htmlLayoutFormat) } ) thread.SetApartmentState(ApartmentState.STA) thread.Start() thread.Join() 'Save the document to a PDF file doc.SaveToFile("UrlToPdf.pdf") doc.Close() End Sub End Class End Namespace
不使用插件将 HTML 字符串转换为 PDF
以下是使用无插件的 Spire.PDF 将 HTML 字符串转换为 PDF 的步骤。
【C#】
using Spire.Pdf; using Spire.Pdf.HtmlConverter; using System.IO; using System.Threading; using System.Drawing; namespace ConvertHtmlStringToPdfWithoutPlugin { class Program { static void Main(string[] args) { //Create a PdfDocument object PdfDocument doc = new PdfDocument(); //Create a PdfPageSettings object PdfPageSettings setting = new PdfPageSettings(); //Save page size and margins through the object setting.Size = new SizeF(1000, 1000); setting.Margins = new Spire.Pdf.Graphics.PdfMargins(20); //Create a PdfHtmlLayoutFormat object PdfHtmlLayoutFormat htmlLayoutFormat = new PdfHtmlLayoutFormat(); //Set IsWaiting property to true htmlLayoutFormat.IsWaiting = true; //Read html string from a .html file string htmlString = File.ReadAllText(@"C:\Users\Administrator\Desktop\Document\Html\Sample.html"); //Load HTML from html string using LoadFromHTML method Thread thread = new Thread(() => { doc.LoadFromHTML(htmlString, true, setting, htmlLayoutFormat); }); thread.SetApartmentState(ApartmentState.STA); thread.Start(); thread.Join(); //Save to a PDF file doc.SaveToFile("HtmlStringToPdf.pdf"); } } }
【VB.NET】
Imports Spire.Pdf Imports Spire.Pdf.HtmlConverter Imports System.IO Imports System.Threading Imports System.Drawing Namespace ConvertHtmlStringToPdfWithoutPlugin Class Program Shared Sub Main(ByVal args() As String) 'Create a PdfDocument object Dim doc As PdfDocument = New PdfDocument() 'Create a PdfPageSettings object Dim setting As PdfPageSettings = New PdfPageSettings() 'Save page size and margins through the object setting.Size = New SizeF(1000, 1000) setting.Margins = New Spire.Pdf.Graphics.PdfMargins(20) 'Create a PdfHtmlLayoutFormat object Dim htmlLayoutFormat As PdfHtmlLayoutFormat = New PdfHtmlLayoutFormat() 'Set IsWaiting property to true htmlLayoutFormat.IsWaiting = True 'Read html string from a .html file Dim htmlString As String = File.ReadAllText("C:\Users\Administrator\Desktop\Document\Html\Sample.html") 'Load HTML from html string using LoadFromHTML method Thread thread = New Thread(() => { doc.LoadFromHTML(htmlString, True, setting, htmlLayoutFormat) } ) thread.SetApartmentState(ApartmentState.STA) thread.Start() thread.Join() 'Save to a PDF file doc.SaveToFile("HtmlStringToPdf.pdf") End Sub End Class End Namespace
以上便是如何将HTML 转换为 PDF,如果您有其他问题也可以继续浏览本系列文章,获取相关教程~