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  • 用C#实现生成PDF文档

    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
    ";
                ConvertToByteAndAddtoStream(strPDFMessage);
    
                xRefs.Add(mPDF.Length);
                strPDFMessage = "1 0 obj
    ";
                ConvertToByteAndAddtoStream(strPDFMessage);
                strPDFMessage = "<< /Length 2 0 R >>
    ";
                ConvertToByteAndAddtoStream(strPDFMessage);
                strPDFMessage = "stream
    ";
                ConvertToByteAndAddtoStream(strPDFMessage);
                ////////PDF文档描述
                streamStart = mPDF.Length;
                //字体
                strPDFMessage = "BT
    /F0 " + fontSize + " Tf
    ";
                ConvertToByteAndAddtoStream(strPDFMessage);
                //PDF文档实体高度
                yPos = pageDepth - pageMargin;
                strPDFMessage = pageMargin + " " + yPos + " Td
    ";
                ConvertToByteAndAddtoStream(strPDFMessage);
                strPDFMessage = leadSize + " TL
    ";
                ConvertToByteAndAddtoStream(strPDFMessage);
    
                //实体内容
                strPDFMessage = "(http://www.wenhui.org)Tj
    ";
                ConvertToByteAndAddtoStream(strPDFMessage);
                strPDFMessage = "ET
    ";
                ConvertToByteAndAddtoStream(strPDFMessage);
                streamEnd = mPDF.Length;
    
                streamLen = streamEnd - streamStart;
                strPDFMessage = "endstream
    endobj
    ";
                ConvertToByteAndAddtoStream(strPDFMessage);
                //PDF文档的版本信息
                xRefs.Add(mPDF.Length);
                strPDFMessage = "2 0 obj
    " + streamLen + "
    endobj
    ";
                ConvertToByteAndAddtoStream(strPDFMessage);
    
                xRefs.Add(mPDF.Length);
                strPDFMessage = "3 0 obj
    <</Type/Page/Parent 4 0 R/Contents 1 0 R>>
    endobj
    ";
                ConvertToByteAndAddtoStream(strPDFMessage);
    
                xRefs.Add(mPDF.Length);
                strPDFMessage = "4 0 obj
    <</Type /Pages /Count 1
    ";
                ConvertToByteAndAddtoStream(strPDFMessage);
                strPDFMessage = "/Kids[
    3 0 R
    ]
    ";
                ConvertToByteAndAddtoStream(strPDFMessage);
                strPDFMessage = "/Resources<</PRocSet[/PDF/Text]/Font<</F0 5 0 R>> >>
    ";
                ConvertToByteAndAddtoStream(strPDFMessage);
                strPDFMessage = "/MediaBox [ 0 0 " + pageWidth + " " + pageDepth + " ]
    >>
    endobj
    ";
                ConvertToByteAndAddtoStream(strPDFMessage);
    
                xRefs.Add(mPDF.Length);
                strPDFMessage = "5 0 obj
    <</Type/Font/Subtype/Type1/BaseFont/Courier/Encoding/WinAnsiEncoding>>
    endobj
    ";
                ConvertToByteAndAddtoStream(strPDFMessage);
    
                xRefs.Add(mPDF.Length);
                strPDFMessage = "6 0 obj
    <</Type/Catalog/Pages 4 0 R>>
    endobj
    ";
                ConvertToByteAndAddtoStream(strPDFMessage);
    
                streamStart = mPDF.Length;
                strPDFMessage = "xref
    0 7
    0000000000 65535 f 
    ";
                for (int i = 0; i < xRefs.Count; i++)
                {
                    strPDFMessage += xRefFormatting((long)xRefs[i]) + " 00000 n 
    ";
                }
                ConvertToByteAndAddtoStream(strPDFMessage);
                strPDFMessage = "trailer
    <<
    /Size " + (xRefs.Count + 1) + "
    /Root 6 0 R
    >>
    ";
                ConvertToByteAndAddtoStream(strPDFMessage);
    
                strPDFMessage = "startxref
    " + streamStart + "
    %%EOF
    ";
                ConvertToByteAndAddtoStream(strPDFMessage);
                mPDF.WriteTo(pPDF.BaseStream);
    
                mPDF.Close();
                pPDF.Close();
            }
        }
    }
    
    


     

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  • 原文地址:https://www.cnblogs.com/pangblog/p/3275439.html
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