本文介绍如何使用C#编程语言从头开始构建一个简单的PDF文件。通过具体步骤和代码示例，展示了设置页面尺寸、字体大小及将文本转换为PDF格式的方法。
(一). 功能
创建PDF文件
(二). 代码
1
using
System;
2
using
System.Data;
3
using
System.Configuration;
4
using
System.Web;
5
using
System.Web.Security;
6
using
System.Web.UI;
7
using
System.Web.UI.WebControls;
8
using
System.Web.UI.WebControls.WebParts;
9
using
System.Web.UI.HtmlControls;
10
using
System.IO;
11
using
System.Text;
12
using
System.Collections;
13
14
public
partial
class
_Default:System.Web.UI.Page
15
{
16
staticfloatpageWidth=594.0f;
17staticfloatpageDepth=828.0f;
18staticfloatpageMargin=30.0f;
19staticfloatfontSize=10.0f;
20staticfloatleadSize=10.0f;
21
22//指定要生成PDF文件的路径
23staticStreamWriterpPDF=newStreamWriter("E:\\net\\WebSites\\Create_PDF_File\\test.pdf");//指定生成的路径
24
25staticMemoryStreammPDF=newMemoryStream();
26
27//ConverttheTextDatatoPDFformatandwritebackto
28//MemoryStream
29staticvoidConvertToByteAndAddtoStream(stringstrMsg)
30
{
31Byte[]buffer=null;
32buffer=ASCIIEncoding.ASCII.GetBytes(strMsg);
33mPDF.Write(buffer,0,buffer.Length);
34buffer=null;
35
}
36
37//FormatthedatalengthinxRefFormat
38staticstringxRefFormatting(longxValue)
39{
40stringstrMsg=xValue.ToString();
41intiLen=strMsg.Length;
42if(iLen<10)
43{
44StringBuilders=newStringBuilder();
45inti=10-iLen;
46s.Append('0',i);
47strMsg=s.ToString()+strMsg;
48}
49returnstrMsg;
50}
51protectedvoidPage_Load(objectsender,EventArgse)
52{
53
54}
55protectedvoidButton1_Click(objectsender,EventArgse)
56{
57//CreateaArrayListforxRefsofPDFDocument
58ArrayListxRefs=newArrayList();
59floatyPos=0f;
60longstreamStart=0;
61longstreamEnd=0;
62longstreamLen=0;
63stringstrPDFMessage=null;
64//PDFHeaderMessage
65strPDFMessage="%PDF-1.1\n";
66ConvertToByteAndAddtoStream(strPDFMessage);
67
68//ID1ForContaint
69//ID2ForLengthoftheStream
70//writetheText
71
72//1>StartanewPage
73xRefs.Add(mPDF.Length);
74strPDFMessage="10obj\n";
75ConvertToByteAndAddtoStream(strPDFMessage);
76strPDFMessage="<</Length20R>>\n";
77ConvertToByteAndAddtoStream(strPDFMessage);
78strPDFMessage="stream\n";
79ConvertToByteAndAddtoStream(strPDFMessage);
80
81//Getthestartofthestream
82streamStart=mPDF.Length;
83strPDFMessage="BT\n/F0"+fontSize+"Tf\n";
84ConvertToByteAndAddtoStream(strPDFMessage);
85yPos=pageDepth-pageMargin;
86strPDFMessage=pageMargin+""+yPos+"Td\n";
87ConvertToByteAndAddtoStream(strPDFMessage);
88strPDFMessage=leadSize+"TL\n";
89ConvertToByteAndAddtoStream(strPDFMessage);
90
91//AddthetextdatatothePDFmemorystream
92strPDFMessage="(Doatest)Tj\n";
93ConvertToByteAndAddtoStream(strPDFMessage);
94strPDFMessage="ET\n";
95ConvertToByteAndAddtoStream(strPDFMessage);
96//GettheEndofthestream
97streamEnd=mPDF.Length;
98//GettheLengthofthestream
99streamLen=streamEnd-streamStart;
100strPDFMessage="endstream\nendobj\n";
101ConvertToByteAndAddtoStream(strPDFMessage);
102
103//Add2objecttoxRef
104xRefs.Add(mPDF.Length);
105strPDFMessage="20obj\n"+streamLen+"\nendobj\n";
106ConvertToByteAndAddtoStream(strPDFMessage);
107
108//AddPagetoxRefs
109xRefs.Add(mPDF.Length);
110strPDFMessage="30obj\n<</Type/Page/Parent40R/Contents10R>>\nendobj\n";
111ConvertToByteAndAddtoStream(strPDFMessage);
112
113//BuildthePages
114xRefs.Add(mPDF.Length);
115strPDFMessage="40obj\n<</Type/Pages/Count1\n";
116ConvertToByteAndAddtoStream(strPDFMessage);
117strPDFMessage="/Kids[\n30R\n]\n";
118ConvertToByteAndAddtoStream(strPDFMessage);
119strPDFMessage="/Resources<</ProcSet[/PDF/Text]/Font<</F050R>>>>\n";
120ConvertToByteAndAddtoStream(strPDFMessage);
121strPDFMessage="/MediaBox[00"+pageWidth+""+pageDepth+"]\n>>\nendobj\n";
122ConvertToByteAndAddtoStream(strPDFMessage);
123
124//AddfonttoxRefs
125xRefs.Add(mPDF.Length);
126strPDFMessage="50obj\n<</Type/Font/Subtype/Type1/BaseFont/Courier/Encoding/WinAnsiEncoding>>\nendobj\n";
127ConvertToByteAndAddtoStream(strPDFMessage);
128
129//AddthecatalogtoxRefs
130xRefs.Add(mPDF.Length);
131strPDFMessage="60obj\n<</Type/Catalog/Pages40R>>\nendobj\n";
132ConvertToByteAndAddtoStream(strPDFMessage);
133
134//xRefsEntry
135streamStart=mPDF.Length;
136strPDFMessage="xref\n07\n000000000065535f\n";
137for(inti=0;i<xRefs.Count;i++)
138{
139strPDFMessage+=xRefFormatting((long)xRefs[i])+"00000n\n";
140}
141ConvertToByteAndAddtoStream(strPDFMessage);
142//TrailerforthePDF
143strPDFMessage="trailer\n<<\n/Size"+(xRefs.Count+1)+"\n/Root60R\n>>\n";
144ConvertToByteAndAddtoStream(strPDFMessage);
145//xReflocationentry
146strPDFMessage="startxref\n"+streamStart+"\n%%EOF\n";
147ConvertToByteAndAddtoStream(strPDFMessage);
148//WritethePDFfromMemoryStreamtoFileStream
149mPDF.WriteTo(pPDF.BaseStream);
150//ClosetheStream
151mPDF.Close();
152pPDF.Close();
153}
154
}
155
using
System;2
using
System.Data;3
using
System.Configuration;4
using
System.Web;5
using
System.Web.Security;6
using
System.Web.UI;7
using
System.Web.UI.WebControls;8
using
System.Web.UI.WebControls.WebParts;9
using
System.Web.UI.HtmlControls;10
using
System.IO;11
using
System.Text;12
using
System.Collections;13
14
public
partial
class
_Default:System.Web.UI.Page15
{16
staticfloatpageWidth=594.0f;17
staticfloatpageDepth=828.0f;18
staticfloatpageMargin=30.0f;19
staticfloatfontSize=10.0f;20
staticfloatleadSize=10.0f;21
22
//指定要生成PDF文件的路径23
staticStreamWriterpPDF=newStreamWriter("E:\\net\\WebSites\\Create_PDF_File\\test.pdf");//指定生成的路径24
25
staticMemoryStreammPDF=newMemoryStream();26
27
//ConverttheTextDatatoPDFformatandwritebackto28
//MemoryStream29
staticvoidConvertToByteAndAddtoStream(stringstrMsg)30
{31
Byte[]buffer=null;32
buffer=ASCIIEncoding.ASCII.GetBytes(strMsg);33
mPDF.Write(buffer,0,buffer.Length);34
buffer=null;35
}36
37
//FormatthedatalengthinxRefFormat38
staticstringxRefFormatting(longxValue)39
{40
stringstrMsg=xValue.ToString();41
intiLen=strMsg.Length;42
if(iLen<10)43
{44
StringBuilders=newStringBuilder();45
inti=10-iLen;46
s.Append('0',i);47
strMsg=s.ToString()+strMsg;48
}49
returnstrMsg;50
}51
protectedvoidPage_Load(objectsender,EventArgse)52
{53
54
}55
protectedvoidButton1_Click(objectsender,EventArgse)56
{57
//CreateaArrayListforxRefsofPDFDocument58
ArrayListxRefs=newArrayList();59
floatyPos=0f;60
longstreamStart=0;61
longstreamEnd=0;62
longstreamLen=0;63
stringstrPDFMessage=null;64
//PDFHeaderMessage65
strPDFMessage="%PDF-1.1\n";66
ConvertToByteAndAddtoStream(strPDFMessage);67
68
//ID1ForContaint69
//ID2ForLengthoftheStream70
//writetheText71
72
//1>StartanewPage73
xRefs.Add(mPDF.Length);74
strPDFMessage="10obj\n";75
ConvertToByteAndAddtoStream(strPDFMessage);76
strPDFMessage="<</Length20R>>\n";77
ConvertToByteAndAddtoStream(strPDFMessage);78
strPDFMessage="stream\n";79
ConvertToByteAndAddtoStream(strPDFMessage);80
81
//Getthestartofthestream82
streamStart=mPDF.Length;83
strPDFMessage="BT\n/F0"+fontSize+"Tf\n";84
ConvertToByteAndAddtoStream(strPDFMessage);85
yPos=pageDepth-pageMargin;86
strPDFMessage=pageMargin+""+yPos+"Td\n";87
ConvertToByteAndAddtoStream(strPDFMessage);88
strPDFMessage=leadSize+"TL\n";89
ConvertToByteAndAddtoStream(strPDFMessage);90
91
//AddthetextdatatothePDFmemorystream92
strPDFMessage="(Doatest)Tj\n";93
ConvertToByteAndAddtoStream(strPDFMessage);94
strPDFMessage="ET\n";95
ConvertToByteAndAddtoStream(strPDFMessage);96
//GettheEndofthestream97
streamEnd=mPDF.Length;98
//GettheLengthofthestream99
streamLen=streamEnd-streamStart;100
strPDFMessage="endstream\nendobj\n";101
ConvertToByteAndAddtoStream(strPDFMessage);102
103
//Add2objecttoxRef104
xRefs.Add(mPDF.Length);105
strPDFMessage="20obj\n"+streamLen+"\nendobj\n";106
ConvertToByteAndAddtoStream(strPDFMessage);107
108
//AddPagetoxRefs109
xRefs.Add(mPDF.Length);110
strPDFMessage="30obj\n<</Type/Page/Parent40R/Contents10R>>\nendobj\n";111
ConvertToByteAndAddtoStream(strPDFMessage);112
113
//BuildthePages114
xRefs.Add(mPDF.Length);115
strPDFMessage="40obj\n<</Type/Pages/Count1\n";116
ConvertToByteAndAddtoStream(strPDFMessage);117
strPDFMessage="/Kids[\n30R\n]\n";118
ConvertToByteAndAddtoStream(strPDFMessage);119
strPDFMessage="/Resources<</ProcSet[/PDF/Text]/Font<</F050R>>>>\n";120
ConvertToByteAndAddtoStream(strPDFMessage);121
strPDFMessage="/MediaBox[00"+pageWidth+""+pageDepth+"]\n>>\nendobj\n";122
ConvertToByteAndAddtoStream(strPDFMessage);123
124
//AddfonttoxRefs125
xRefs.Add(mPDF.Length);126
strPDFMessage="50obj\n<</Type/Font/Subtype/Type1/BaseFont/Courier/Encoding/WinAnsiEncoding>>\nendobj\n";127
ConvertToByteAndAddtoStream(strPDFMessage);128
129
//AddthecatalogtoxRefs130
xRefs.Add(mPDF.Length);131
strPDFMessage="60obj\n<</Type/Catalog/Pages40R>>\nendobj\n";132
ConvertToByteAndAddtoStream(strPDFMessage);133
134
//xRefsEntry135
streamStart=mPDF.Length;136
strPDFMessage="xref\n07\n000000000065535f\n";137
for(inti=0;i<xRefs.Count;i++)138
{139
strPDFMessage+=xRefFormatting((long)xRefs[i])+"00000n\n";140
}141
ConvertToByteAndAddtoStream(strPDFMessage);142
//TrailerforthePDF143
strPDFMessage="trailer\n<<\n/Size"+(xRefs.Count+1)+"\n/Root60R\n>>\n";144
ConvertToByteAndAddtoStream(strPDFMessage);145
//xReflocationentry146
strPDFMessage="startxref\n"+streamStart+"\n%%EOF\n";147
ConvertToByteAndAddtoStream(strPDFMessage);148
//WritethePDFfromMemoryStreamtoFileStream149
mPDF.WriteTo(pPDF.BaseStream);150
//ClosetheStream151
mPDF.Close();152
pPDF.Close();153
}154
}
155
(三). 示例代码下载
http://www.cnblogs.com/Files/ChengKing/Create_PDF_File.rar
[本文核心代码为引用，方便查看用]
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