我利用itextsharp把tif文件转换成pdf文件
我的代码为: if (!System.IO.Directory.Exists(@"D:\temp"))
{
System.IO.Directory.CreateDirectory(@"D:\temp");
} String sourcePath = @"\\172.16.2.100\diesel_man\" + filename + ".tif";
String targetPath = @"D:\temp\" + filename + ".tif";
bool isrewrite = true;
System.IO.File.Copy(sourcePath, targetPath, isrewrite);
iTextSharp.text.Image image;
Document document = new Document(iTextSharp.text.PageSize.A4, 25, 25, 25, 25);
PdfWriter.getInstance(document, new FileStream(filename, FileMode.Create));
document.Open(); image = iTextSharp.text.Image.getInstance(@"D:\temp\" + filename + ".tif");
if (image.Height > iTextSharp.text.PageSize.A4.Height - 25)
image.scaleToFit(iTextSharp.text.PageSize.A4.Width - 25, iTextSharp.text.PageSize.A4.Height - 25);
else if (image.Width > iTextSharp.text.PageSize.A4.Width - 25)
image.scaleToFit(iTextSharp.text.PageSize.A4.Width - 25, iTextSharp.text.PageSize.A4.Height - 25);
image.Alignment = iTextSharp.text.Image.MIDDLE;
document.newPage();
document.Add(image);
document.Close();在调试程序的时候,出现了异常为:file:///D:temp/0470683-6.4.tif is not a recognized imageformat.
我理解为iTextSharp的image对象不能识别tif格式的文件我在网上找了另一种办法,是先把tif文件转换成位图,然后把位图插入pdf,可是那样转换的效率太低,而且不清晰有没有什么解决办法,小弟在此谢过在线等回答!
我的代码为: if (!System.IO.Directory.Exists(@"D:\temp"))
{
System.IO.Directory.CreateDirectory(@"D:\temp");
} String sourcePath = @"\\172.16.2.100\diesel_man\" + filename + ".tif";
String targetPath = @"D:\temp\" + filename + ".tif";
bool isrewrite = true;
System.IO.File.Copy(sourcePath, targetPath, isrewrite);
iTextSharp.text.Image image;
Document document = new Document(iTextSharp.text.PageSize.A4, 25, 25, 25, 25);
PdfWriter.getInstance(document, new FileStream(filename, FileMode.Create));
document.Open(); image = iTextSharp.text.Image.getInstance(@"D:\temp\" + filename + ".tif");
if (image.Height > iTextSharp.text.PageSize.A4.Height - 25)
image.scaleToFit(iTextSharp.text.PageSize.A4.Width - 25, iTextSharp.text.PageSize.A4.Height - 25);
else if (image.Width > iTextSharp.text.PageSize.A4.Width - 25)
image.scaleToFit(iTextSharp.text.PageSize.A4.Width - 25, iTextSharp.text.PageSize.A4.Height - 25);
image.Alignment = iTextSharp.text.Image.MIDDLE;
document.newPage();
document.Add(image);
document.Close();在调试程序的时候,出现了异常为:file:///D:temp/0470683-6.4.tif is not a recognized imageformat.
我理解为iTextSharp的image对象不能识别tif格式的文件我在网上找了另一种办法,是先把tif文件转换成位图,然后把位图插入pdf,可是那样转换的效率太低,而且不清晰有没有什么解决办法,小弟在此谢过在线等回答!
用C#实现生成PDF文档(原码)
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作者:wyhw 发表时间:2003-5-11 推荐程度: ★ 查看作者信息以及作者文集
//write by wenhui.org
using System;
using System.IO;
using System.Text;
using System.Collections; namespace PDFGenerator
{ public class PDFGenerator
{
static float pageWidth = 594.0f;
static float pageDepth = 828.0f;
static float pageMargin = 30.0f;
static float fontSize = 20.0f;
static float leadSize = 10.0f;
static StreamWriter pPDF=new StreamWriter( "E:\\myPDF.pdf "); static MemoryStream mPDF= new MemoryStream(); static void ConvertToByteAndAddtoStream(string strMsg)
{
Byte[] buffer=null;
buffer=ASCIIEncoding.ASCII.GetBytes(strMsg);
mPDF.Write(buffer,0,buffer.Length);
buffer=null;
} static string xRefFormatting(long xValue)
{
string strMsg =xValue.ToString();
int iLen=strMsg.Length;
if (iLen <10)
{
StringBuilder s=new StringBuilder();
int i=10-iLen;
s.Append( '0 ',i);
strMsg=s.ToString() + strMsg;
}
return strMsg;
} static void Main(string[] args)
{
ArrayList xRefs=new ArrayList();
//Byte[] buffer=null;
float yPos =0f;
long streamStart=0;
long streamEnd=0;
long streamLen =0;
string strPDFMessage=null;
//PDF文档头信息
strPDFMessage= "%PDF-1.1\n ";
ConvertToByteAndAddtoStream(strPDFMessage); xRefs.Add(mPDF.Length);
strPDFMessage= "1 0 obj\n ";
ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage= " < < /Length 2 0 R > > \n ";
ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage= "stream\n ";
ConvertToByteAndAddtoStream(strPDFMessage);
////////PDF文档描述
streamStart=mPDF.Length;
//字体
strPDFMessage= "BT\n/F0 " + fontSize + " Tf\n ";
ConvertToByteAndAddtoStream(strPDFMessage);
//PDF文档实体高度
yPos = pageDepth - pageMargin;
strPDFMessage=pageMargin + " " + yPos + " Td\n " ;
ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage= leadSize+ " TL\n " ;
ConvertToByteAndAddtoStream(strPDFMessage); //实体内容
strPDFMessage= "(http://www.wenhui.org)Tj\n " ;
ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage= "ET\n ";
ConvertToByteAndAddtoStream(strPDFMessage);
streamEnd=mPDF.Length; streamLen=streamEnd-streamStart;
strPDFMessage= "endstream\nendobj\n ";
ConvertToByteAndAddtoStream(strPDFMessage);
//PDF文档的版本信息
xRefs.Add(mPDF.Length);
strPDFMessage= "2 0 obj\n "+ streamLen + "\nendobj\n ";
ConvertToByteAndAddtoStream(strPDFMessage); xRefs.Add(mPDF.Length);
strPDFMessage= "3 0 obj\n < </Type/Page/Parent 4 0 R/Contents 1 0 R> > \nendobj\n ";
ConvertToByteAndAddtoStream(strPDFMessage); xRefs.Add(mPDF.Length);
strPDFMessage= "4 0 obj\n < </Type /Pages /Count 1\n ";
ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage= "/Kids[\n3 0 R\n]\n ";
ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage= "/Resources < </ProcSet[/PDF/Text]/Font < </F0 5 0 R> > > > \n ";
ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage= "/MediaBox [ 0 0 "+ pageWidth + " " + pageDepth + " ]\n> > \nendobj\n ";
ConvertToByteAndAddtoStream(strPDFMessage); xRefs.Add(mPDF.Length);
strPDFMessage= "5 0 obj\n < </Type/Font/Subtype/Type1/BaseFont/Courier/Encoding/WinAnsiEncoding> > \nendobj\n ";
ConvertToByteAndAddtoStream(strPDFMessage); xRefs.Add(mPDF.Length);
strPDFMessage= "6 0 obj\n < </Type/Catalog/Pages 4 0 R> > \nendobj\n ";
ConvertToByteAndAddtoStream(strPDFMessage); streamStart=mPDF.Length;
strPDFMessage= "xref\n0 7\n0000000000 65535 f \n ";
for(int i=0;i <xRefs.Count;i++)
{
strPDFMessage+=xRefFormatting((long) xRefs[i])+ " 00000 n \n ";
}
ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage= "trailer\n < <\n/Size "+ (xRefs.Count+1)+ "\n/Root 6 0 R\n> > \n ";
ConvertToByteAndAddtoStream(strPDFMessage); strPDFMessage= "startxref\n " + streamStart+ "\n%%EOF\n ";
ConvertToByteAndAddtoStream(strPDFMessage);
mPDF.WriteTo(pPDF.BaseStream); mPDF.Close();
pPDF.Close();
}
}
}