C# html生成PDF遇到的问题，从iTextSharp到wkhtmltopdf

  1 public class PDFHelper
  2     {
  3         public byte[] ConvertHtmlTextToPDF(string htmlText)
  4         {
  5             if (string.IsNullOrEmpty(htmlText))
  6             {
  7                 return null;
  8             }
  9             //避免当htmlText无任何html tag标签的纯文字时，转PDF时会挂掉，所以一律加上<p>标签  
 10             htmlText = "<p>" + htmlText + "</p>";
 11             MemoryStream outputStream = new MemoryStream();//要把PDF写到哪个串流  
 12             byte[] data = Encoding.UTF8.GetBytes(htmlText);//字串转成byte[]  
 13             MemoryStream msInput = new MemoryStream(data);
 14             Document doc = new Document();//要写PDF的文件，建构子没填的话预设直式A4  
 15 
 16             PdfWriter writer = PdfWriter.GetInstance(doc, outputStream);
 17             PdfDestination pdfDest = new PdfDestination(PdfDestination.XYZ, 0, doc.PageSize.Height, 1f);
 18             //开启Document文件 
 19             doc.Open();
 20             HeaderAndFooterEvent header = new HeaderAndFooterEvent();
 21             header.tpl = writer.DirectContent.CreateTemplate(100, 100);
 22             writer.PageEvent = header;
 23 
 24             //使用XMLWorkerHelper把Html parse到PDF档里  
 25             XMLWorkerHelper.GetInstance().ParseXHtml(writer, doc, msInput, null, Encoding.UTF8, new UnicodeFontFactory());
 26 
 27             //将pdfDest设定的资料写到PDF档  
 28             PdfAction action = PdfAction.GotoLocalPage(1, pdfDest, writer);
 29             writer.SetOpenAction(action);
 30             doc.Close();
 31             msInput.Close();
 32             outputStream.Close();
 33             //回传PDF档案   
 34             return outputStream.ToArray();
 35 
 36         }
 37     }
 38     public class UnicodeFontFactory : FontFactoryImp
 39     {
 40 
 41         public override Font GetFont(string fontname, string encoding, bool embedded, float size, int style, BaseColor color, bool cached)
 42         {
 43             string FontPath = System.Web.Hosting.HostingEnvironment.MapPath("~/Font/");
 44 
 45             BaseFont bfYaHei = BaseFont.CreateFont(FontPath + "msyh.ttc,1", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
 46             return new Font(bfYaHei, size, style, color);
 47         }
 48     }
 49 
 50     public class HeaderAndFooterEvent : PdfPageEventHelper, IPdfPageEvent
 51     {
 52         public PdfTemplate tpl = null;
 53         public bool PAGE_NUMBER = true;
 54         private int PageCount = 1;
 55         private static string FontPath = System.Web.Hosting.HostingEnvironment.MapPath("~/Font/");
 56         private static BaseFont bfYaHei = BaseFont.CreateFont(FontPath + "msyh.ttc,1", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
 57         private static iTextSharp.text.Font font = new Font(bfYaHei, 10, Font.NORMAL, BaseColor.BLACK);
 58 
 59         //重写 关闭一个页面时
 60         public override void OnEndPage(PdfWriter writer, Document document)
 61         {
 62             if (PAGE_NUMBER)
 63             {
 64                 Phrase footer = new Phrase("www.XXXX.com                                                                                                                            第" + writer.PageNumber + "页/共   页", font);
 65                 PdfContentByte cb = writer.DirectContent;
 66 
 67                 //模版 显示总共页数
 68                 cb.AddTemplate(tpl, document.Right - 54 + document.LeftMargin, document.Bottom - 15);//调节模版显示的位置
 69 
 70 
 71                 //页脚显示的位置
 72                 ColumnText.ShowTextAligned(cb, Element.ALIGN_CENTER, footer, document.Right - 297 + document.LeftMargin, document.Bottom - 14, 0);
 73             }
 74         }
 75         //重写 打开一个新页面时
 76         public override void OnStartPage(PdfWriter writer, Document document)
 77         {
 78             if (PAGE_NUMBER)
 79             {
 80                 PageCount += 1;
 81                 writer.PageCount = PageCount;
 82             }
 83         }
 84         //关闭PDF文档时
 85         public override void OnCloseDocument(PdfWriter writer, Document document)
 86         {
 87             tpl.BeginText();
 88             tpl.SetFontAndSize(bfYaHei, 10);//生成的模版的字体、颜色
 89             tpl.ShowText(PageCount.ToString());//模版显示的内容
 90             tpl.EndText();
 91             tpl.ClosePath();
 92         }
 93         //定义输出文本
 94         public static Paragraph InsertTitleContent(string text)
 95         {
 96 
 97             Paragraph paragraph = new Paragraph(text, font);//新建一行
 98 
 99             paragraph.Alignment = Element.ALIGN_CENTER;//居中
100 
101             paragraph.SpacingBefore = 5;
102 
103             paragraph.SpacingAfter = 5;
104             paragraph.SetLeading(1, 2);//每行间的间隔
105             return paragraph;
106         }
107     }

 1 public static byte[] ConvertHtmlToPdf(string html)
 2         {
 3 
 4             try
 5             {
 6                 using (IPechkin pechkin = Factory.Create(new GlobalConfig()))
 7                 {
 8                     ObjectConfig oc = new ObjectConfig();
 9                     oc.SetPrintBackground(true)
10                         .SetLoadImages(true).Footer.SetContentSpacing(30).SetLeftText("www.XXXX.com").SetRightText("[page]/[toPage]");
11                     byte[] pdf = pechkin.Convert(oc, html);
12                     return pdf;
13                 }
14             }
15             catch (Exception)
16             {
17 
18             }
19             return null;
20         }