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【CSharp】生成PDF文档

作者:dezai / 发布于2014/6/20/ 446

生成PDF


	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();
	 }
	 }
	}

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