在线时间:8:00-16:00
迪恩网络APP
随时随地掌握行业动态
扫描二维码
关注迪恩网络微信公众号
using System; using System.Collections.Generic; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using iTextSharp.text; using iTextSharp.text.pdf; using System.IO; using iTextSharp.tool.xml; using System.Text; using System.Net; namespace PDFTools { public partial class CreatePdf : System.Web.UI.Page { string INPATH = System.Web.HttpContext.Current.Server.MapPath("~/bin/temp.html"); protected void Page_Load(object sender, EventArgs e) { string path = System.Web.HttpContext.Current.Server.MapPath("~/UploadPdf"); if (!Directory.Exists(path)) Directory.CreateDirectory(path); WebClient wc = new WebClient(); //从网址下载Html字串 wc.Encoding = System.Text.Encoding.UTF8; string htmlText = getWebContent(); byte[] pdfFile = this.ConvertHtmlTextToPDF(htmlText); string fileId = "/file_" + DateTime.Now.ToString("yyyyMMddHHmmss") + ".pdf"; System.IO.File.WriteAllBytes(path + fileId, pdfFile); } /// <summary> /// 判断是否有乱码 /// </summary> /// <param name="txt"></param> /// <returns></returns> public bool isMessyCode(string txt) { var bytes = Encoding.UTF8.GetBytes(txt); //239 191 189 for (var i = 0; i < bytes.Length; i++) { if (i < bytes.Length - 3) if (bytes[i] == 239 && bytes[i + 1] == 191 && bytes[i + 2] == 189) { return true; } } return false; } /// <summary> /// 获取网站内容,包含了 HTML+CSS+JS /// </summary> /// <returns>String返回网页信息</returns> public string getWebContent() { try { WebClient MyWebClient = new WebClient(); MyWebClient.Credentials = CredentialCache.DefaultCredentials; //获取或设置用于向Internet资源的请求进行身份验证的网络凭据 Byte[] pageData = MyWebClient.DownloadData(INPATH); //从指定网站下载数据 string pageHtml = Encoding.UTF8.GetString(pageData); //如果获取网站页面采用的是GB2312,则使用这句 bool isBool = isMessyCode(pageHtml);//判断使用哪种编码 读取网页信息 if (!isBool) { string pageHtml1 = Encoding.UTF8.GetString(pageData); pageHtml = pageHtml1; } else { string pageHtml2 = Encoding.Default.GetString(pageData); pageHtml = pageHtml2; } return pageHtml; } catch (WebException webEx) { Console.WriteLine(webEx.Message.ToString()); return webEx.Message; } } /// <summary> /// 将Html文字 输出到PDF档里 /// </summary> /// <param name="htmlText"></param> /// <returns></returns> public byte[] ConvertHtmlTextToPDF(string htmlText) { if (string.IsNullOrEmpty(htmlText)) { return null; } //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 htmlText = "<p>" + htmlText + "</p>"; MemoryStream outputStream = new MemoryStream();//要把PDF写到哪个串流 byte[] data = Encoding.UTF8.GetBytes(htmlText);//字串转成byte[] MemoryStream msInput = new MemoryStream(data); Document doc = new Document();//要写PDF的文件,建构子没填的话预设直式A4 PdfWriter writer = PdfWriter.GetInstance(doc, outputStream); //指定文件预设开档时的缩放为100% PdfDestination pdfDest = new PdfDestination(PdfDestination.XYZ, 0, doc.PageSize.Height, 1f); //开启Document文件 doc.Open(); //使用XMLWorkerHelper把Html parse到PDF档里 // XMLWorkerHelper.GetInstance().ParseXHtml(writer, doc, msInput, null, Encoding.UTF8, new UnicodeFontFactory()); XMLWorkerHelper.GetInstance().ParseXHtml(writer, doc, msInput, null, Encoding.UTF8); //将pdfDest设定的资料写到PDF档 PdfAction action = PdfAction.GotoLocalPage(1, pdfDest, writer); writer.SetOpenAction(action); doc.Close(); msInput.Close(); outputStream.Close(); //回传PDF档案 return outputStream.ToArray(); } //设置字体类 public class UnicodeFontFactory : FontFactoryImp { private static readonly string arialFontPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Fonts), "arialuni.ttf");//arial unicode MS是完整的unicode字型。 private static readonly string 标楷体Path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Fonts), "KAIU.TTF");//标楷体 public override Font GetFont(string fontname, string encoding, bool embedded, float size, int style, BaseColor color, bool cached) { BaseFont bfChiness = BaseFont.CreateFont(@"C:\Windows\Fonts\SIMSUN.TTC,1", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED); //可用Arial或标楷体,自己选一个 BaseFont baseFont = BaseFont.CreateFont(标楷体Path, BaseFont.IDENTITY_H, BaseFont.EMBEDDED); return new Font(bfChiness, size, style, color); } } } }
|
2023-10-27
2022-08-15
2022-08-17
2022-09-23
2022-08-13
请发表评论