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【
CSharp
】
C#实现生成PDF文档
作者:
/ 发布于
2010/12/31
/
810
<div>//write by wenhui.org using System; using System.IO; using System.Text; using System.Collections;</div> <div>namespace PDFGenerator {</div> <div>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;</div> <div> static StreamWriter pPDF=new StreamWriter("E:\\myPDF.pdf");</div> <div>static MemoryStream mPDF= new MemoryStream();</div> <div>static void ConvertToByteAndAddtoStream(string strMsg) { Byte[] buffer=null; buffer=ASCIIEncoding.ASCII.GetBytes(strMsg); mPDF.Write(buffer,0,buffer.Length); buffer=null; } <div>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; } <div>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);</div> <div>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);</div> <div>//实体内容 strPDFMessage= "(<a href="http://www.wenhui.org)Tj\n">http://www.wenhui.org)Tj\n</a>" ; ConvertToByteAndAddtoStream(strPDFMessage); strPDFMessage= "ET\n"; ConvertToByteAndAddtoStream(strPDFMessage); streamEnd=mPDF.Length;</div> <div>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);</div> <div>xRefs.Add(mPDF.Length); strPDFMessage="3 0 obj\n<</Type/Page/Parent 4 0 R/Contents 1 0 R>>\nendobj\n"; ConvertToByteAndAddtoStream(strPDFMessage);</div> <div>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);</div> <div>xRefs.Add(mPDF.Length); strPDFMessage="5 0 obj\n<</Type/Font/Subtype/Type1/BaseFont/Courier/Encoding/WinAnsiEncoding>>\nendobj\n"; ConvertToByteAndAddtoStream(strPDFMessage);</div> <div>xRefs.Add(mPDF.Length); strPDFMessage="6 0 obj\n<</Type/Catalog/Pages 4 0 R>>\nendobj\n"; ConvertToByteAndAddtoStream(strPDFMessage);</div> <div>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);</div> <div>strPDFMessage="startxref\n" + streamStart+"\n%%EOF\n"; ConvertToByteAndAddtoStream(strPDFMessage); mPDF.WriteTo(pPDF.BaseStream);</div> <div>mPDF.Close(); pPDF.Close(); } } } </div>
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