namespace Utilities
{
public static class PDFHelper
{
/// <summary>
/// Html转Pdf
/// </summary>
/// <param name="strHtmlData">HTML内容</param>
/// <param name="filePath">文件路径</param>
/// <param name="fileName">文件名</param>
public static bool HtmlToPdfByInfo(string strHtmlData, string filePath, string fileName)
{
FileStream fs = null;
try
{
if (!Directory.Exists(filePath))
{
Directory.CreateDirectory(filePath);
}
//获得字节数组
byte[] bPDF = ConvertHtmlTextToPDF(strHtmlData);
if (bPDF == null)
{
return false;
}
fs = new FileStream(Path.Combine(filePath, fileName), FileMode.Create);
//开始写入
fs.Write(bPDF, 0, bPDF.Length);
return true;
}
catch (Exception)
{
throw;
}
finally
{
//清空缓冲区、关闭流
if (fs != null)
{
fs.Flush();
fs.Close();
}
}
}
public static bool DownLoadFile(string url, string filePath, string fileName)
{
try
{
WebClient wc = new WebClient();
wc.Encoding = System.Text.Encoding.UTF8;
if (!Directory.Exists(filePath))
{
Directory.CreateDirectory(filePath);
}
wc.DownloadFile(url, Path.Combine(filePath, fileName));
return true;
}
catch (Exception ex)
{
string strLog = string.Format("下载文件名：{0}；文件下载地址：{1}；错误信息：{2}。", fileName, url, ex.StackTrace);
LogHelper.Info(strLog);
throw ex;
}
}
#region HTML模板方式转PDF(格式问题)
/// <summary>
/// Html转Pdf
/// </summary>
/// <param name="url">页面地址，要完整地址</param>
/// <param name="filePath">文件路径</param>
/// <param name="fileName">文件名</param>
public static bool HtmlToPdf(string url, string filePath, string fileName)
{
FileStream fs = null;
try
{
WebClient wc = new WebClient();
wc.Encoding = System.Text.Encoding.UTF8;
//从网址下载Html字串
string htmlText = wc.DownloadString(url);
//StreamWriter TxtWriter = new StreamWriter(@"D:\logfile.txt", true);
//TxtWriter.Write("0" + Environment.NewLine);
//TxtWriter.Write(htmlText + Environment.NewLine);
//TxtWriter.Close();
//获得字节数组
byte[] bPDF = ConvertHtmlTextToPDF(htmlText);
if (bPDF == null)
{
return false;
}
if (!Directory.Exists(filePath))
{
Directory.CreateDirectory(filePath);
}
fs = new FileStream(Path.Combine(filePath, fileName), FileMode.Create);
//开始写入
fs.Write(bPDF, 0, bPDF.Length);
return true;
}
catch (Exception ex)
{
string strLog = string.Format("HTML模板方式转PDF 文件名：{0}；文件下载地址：{1}；错误信息：{2}。", fileName, url, ex.StackTrace);
LogHelper.Info(strLog);
throw ex;
}
finally
{
//清空缓冲区、关闭流
if (fs != null)
{
fs.Flush();
fs.Close();
}
}
}
#endregion
private static 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);
//PageEventHelper pageEventHelper = new PageEventHelper();
//writer.PageEvent = pageEventHelper;
//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);
XMLWorkerHelper.GetInstance().ParseXHtml(writer, doc, msInput, null, Encoding.UTF8, new UnicodeFontFactory());
//XMLWorkerHelper.GetInstance().ParseXHtml(writer, doc, msInput, null, Encoding.UTF8, new UnicodeFontFactory());
//将pdfDest设定的资料写到PDF档
PdfAction action = PdfAction.GotoLocalPage(1, pdfDest, writer);
writer.SetOpenAction(action);
////手工加内容
//doc.NewPage();
////要先定义中文字体
//BaseFont BF_Light = BaseFont.CreateFont(@"C:\Windows\Fonts\simsun.ttc,0", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
////要设置字体和大小
//var p = new Paragraph("合同信息", new Font(BF_Light, 13));
//PdfPTable table = new PdfPTable(1);
//PdfPCell cell = new PdfPCell(p);
////设置cell属性
//cell.HorizontalAlignment = Element.ALIGN_CENTER;
////添加单元格
//table.AddCell(cell);
//doc.Add(table);
doc.Close();
msInput.Close();
outputStream.Close();
//回传PDF档案
return outputStream.ToArray();
}
#region 创建PDF文档
/// <summary>
/// 生成PDF
/// </summary>
/// <param name="strHtmlData">HTML内容</param>
/// <param name="filePath">文件路径</param>
/// <param name="fileName">文件名</param>
public static bool CreatePdf(string filePath, string fileName, PdfPTable dt)
{
FileStream fs = null;
try
{
if (!Directory.Exists(filePath))
{
Directory.CreateDirectory(filePath);
}
//获得字节数组
byte[] bPDF = CreatePdf(dt);
if (bPDF == null)
{
return false;
}
fs = new FileStream(Path.Combine(filePath, fileName), FileMode.Create);
//开始写入
fs.Write(bPDF, 0, bPDF.Length);
return true;
}
catch (Exception)
{
throw;
}
finally
{
//清空缓冲区、关闭流
if (fs != null)
{
fs.Flush();
fs.Close();
}
}
}
/// <summary>
/// 创建PDF
/// </summary>
/// <param name="htmlText"></param>
/// <returns></returns>
private static byte[] CreatePdf(PdfPTable pdfTable)
{
MemoryStream outputStream = new MemoryStream();//要把PDF写到哪个串流
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();
//将pdfDest设定的资料写到PDF档
PdfAction action = PdfAction.GotoLocalPage(1, pdfDest, writer);
writer.SetOpenAction(action);
//手工加内容
doc.NewPage();
doc.Add(pdfTable);
var row = pdfTable.Rows[pdfTable.Rows.Count];
//iTextSharp.text.Image splitline = iTextSharp.text.Image.GetInstance(@"E:\WorkCodes\YeWu\YCloud.MFBP.Web\Images\yaoshi.png");
//splitline.ScalePercent(12f); //图片比例
//splitline.SetAbsolutePosition(doc.PageSize.Width- doc.PageSize.Width/3*2, doc.PageSize.Height - doc.PageSize.Height/5*4);
doc.Close();
outputStream.Close();
//回传PDF档案
return outputStream.ToArray();
}
#endregion
}
public class UnicodeFontFactory : FontFactoryImp
{
static string fontPath = Environment.GetFolderPath(Environment.SpecialFolder.Fonts);
//arial unicode MS是完整的unicode字型。
//private static readonly string arialFontPath = Path.Combine(fontPath, "arialuni.ttf");
//宋体。
private static readonly string stFontPath = Path.Combine(fontPath, "simsun.ttc,0");
public override Font GetFont(string fontname, string encoding, bool embedded, float size, int style, BaseColor color, bool cached)
{
BaseFont baseFont = BaseFont.CreateFont(stFontPath, BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
return new Font(baseFont, size, style, color);
}
}
public class PageEventHelper : PdfPageEventHelper
{
PdfContentByte cb;
PdfTemplate template;
public override void OnOpenDocument(PdfWriter writer, Document document)
{
cb = writer.DirectContent;
template = cb.CreateTemplate(100, 50);
}
public override void OnStartPage(PdfWriter writer, Document document)
{
base.OnStartPage(writer, document);
}
public override void OnEndPage(PdfWriter writer, Document document)
{
base.OnEndPage(writer, document);
String text = "第" + writer.PageNumber.ToString() + "页";
UnicodeFontFactory info = new UnicodeFontFactory();
float len = 10;
iTextSharp.text.Rectangle pageSize = document.PageSize;
cb.SetRGBColorFill(100, 100, 100);
string fontPath = Environment.GetFolderPath(Environment.SpecialFolder.Fonts);
string stFontPath = Path.Combine(fontPath, "simsun.ttc,0");
BaseFont baseFont = BaseFont.CreateFont(stFontPath, BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
cb.BeginText();
cb.SetFontAndSize(baseFont, 10);
cb.SetTextMatrix(document.LeftMargin, pageSize.GetBottom(document.BottomMargin));
cb.ShowText(text);
cb.EndText();
cb.AddTemplate(template, document.LeftMargin + len, pageSize.GetBottom(document.BottomMargin));
}
public override void OnCloseDocument(PdfWriter writer, Document document)
{
base.OnCloseDocument(writer, document);
string fontPath = Environment.GetFolderPath(Environment.SpecialFolder.Fonts);
string stFontPath = Path.Combine(fontPath, "simsun.ttc,0");
BaseFont baseFont = BaseFont.CreateFont(stFontPath, BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
template.BeginText();
template.SetFontAndSize(baseFont, 10);
template.SetTextMatrix(12, 0);
template.ShowText("共" + writer.PageNumber + "页");
template.EndText();
}
}
}
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