1、安装引用Aspose.Html

1）使用Nuget界面管理器

直接分别搜索 "Aspose.Html"，找到对应的点安装即可。

相关文档：VS(Visual Studio)中Nuget的使用

2）使用Package Manager命令安装

PM> Install-Package Aspose.Html

注意：使用Aspose是需要有License的，如没有也可以网上找一下破解版本。

2、使用Aspose.Html将HTML转成PDF

使用Aspose.HTML for .NET 提供了Converter类的静态方法，可以很方便的将HTML转换成PDF，代码如下，

using System;using System.Collections.Generic;using System.IO;using System.Linq;using System.Text;using System.Threading.Tasks;using Aspose.Html.Converters;using Aspose.Html.Saving;namespace ConsoleApplication{    class Program    {        public static string outputFile { get; private set; }       static void Main(string[] args)        {            //var license = new Aspose.Html.License();            //license.SetLicense("Aspose.Html.lic");            Converter.ConvertHTML(@"
Convert HTML to PDF!
", ".", new PdfSaveOptions(), Path.Combine("/home/wonhero", "convert-with-single-line.pdf"));            Console.ReadKey();        }    }}

3、使用Aspose.Html将URL中HTML转换PDF

使用Aspose.Html中HTMLDocument可以直接指定URL，将URL中HTML转换PDF，代码如下，

using System;using System.Collections.Generic;using System.IO;using System.Linq;using System.Net;using System.Net.Http;using System.Text;using System.Threading.Tasks;using Aspose.Html;using Aspose.Html.Converters;using Aspose.Html.Dom;using Aspose.Html.Saving;namespace ConsoleApplication{    class Program    {        private static Stream GetContentFromUrlAsStream(string url, ICredentials credentials = null)        {            using (var handler = new HttpClientHandler { Credentials = credentials })            using (var httpClient = new HttpClient(handler))            {                return httpClient.GetStreamAsync(url).GetAwaiter().GetResult();            }        }        static void Main(string[] args)        {            //var license = new Aspose.Html.License();            //license.SetLicense("Aspose.Html.lic");            const string url = "https://en.wikipedia.org/wiki/Aspose_API";            var document = new HTMLDocument(url);            Converter.ConvertHTML(document, new PdfSaveOptions(),"/home/wonhero/output.pdf");            Console.ReadKey();        }    }}