我正在 Libre Office 中创建表单控件并将文档导出为 pdf。
尝试使用 itextsharp(即 C# 程序)设置控件(文本框)的文本只会清空该框。
但是,如果我使用 acrobat reader 打开 pdf 并编辑框中的文本,则将文档结果保存在 pdf 中,以便可以写入该文本框。
为什么我必须这样做?
##错误重现
单击 libreoffice 中的工具栏图标。
在文档中拖出一个正方形。
Double clicking that box, giving it the name currenttime.
导出为 pdf:
c# code
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
if (saveFileDialog1.ShowDialog() == DialogResult.OK)
{
using (var fs = new FileStream(saveFileDialog1.FileName, FileMode.Create))
{
var reader = new PdfReader(openFileDialog1.FileName);
{
using (var pdfStamper = new PdfStamper(reader, fs))
{
var acroFields = pdfStamper.AcroFields;
acroFields.SetField("currentdate", DateTime.Now.ToString());
pdfStamper.FormFlattening = true;
pdfStamper.FreeTextFlattening = true;
pdfStamper.Writer.CloseStream = false;
}
}
reader.Close();
fs.Close();
}
}
}
#edit
这是 pdf 的文本转储。我用“一些二进制数据”更改了一些二进制数据位置。文本框已被赋予默认值“123”。
使用 libre office 创建后的 pdf 版本为 1.4
%PDF-1.4
some binary data
2 0 obj
<</Length 3 0 R/Filter/FlateDecode>>
stream
some binary data
endstream
endobj
3 0 obj
78
endobj
7 0 obj
<</Type/FontDescriptor/FontName/LiberationSans
/Flags 4
/FontBBox[-543 -303 1301 980]/ItalicAngle 0
/Ascent 905
/Descent -211
/CapHeight 979
/StemV 80
>>
endobj
8 0 obj
<</Type/Font/Subtype/TrueType/BaseFont/LiberationSans
/Encoding/WinAnsiEncoding
/FirstChar 32 /LastChar 255
/Widths[277 277 354 556 556 889 666 190 333 333 389 583 277 333 277 277
556 556 556 556 556 556 556 556 556 556 277 277 583 583 583 556
1015 666 666 722 722 666 610 777 722 277 500 666 556 833 722 777
666 777 722 666 610 722 666 943 666 666 610 277 277 277 469 556
333 556 556 500 556 556 277 556 556 222 222 500 222 833 556 556
556 556 333 500 277 556 500 722 500 500 500 333 259 333 583 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
277 333 556 556 556 556 259 556 333 736 370 556 583 333 736 552
399 548 333 333 333 576 537 333 333 333 365 556 833 833 833 610
666 666 666 666 666 666 1000 722 666 666 666 666 277 277 277 277
722 722 777 777 777 777 777 583 777 722 722 722 722 666 666 610
556 556 556 556 556 556 889 500 556 556 556 556 277 277 277 277
556 556 556 556 556 556 556 548 610 556 556 556 556 500 556 500
]
/FontDescriptor 7 0 R>>
endobj
5 0 obj
<</F1 8 0 R
>>
endobj
9 0 obj
<</Font 5 0 R
/ProcSet[/PDF/Text]
>>
endobj
1 0 obj
<</Type/Page/Parent 6 0 R/Resources 9 0 R/MediaBox[0 0 595 842]/Annots[
4 0 R ]
/Group<</S/Transparency/CS/DeviceRGB/I true>>/Contents 2 0 R>>
endobj
6 0 obj
<</Type/Pages
/Resources 9 0 R
/MediaBox[ 0 0 595 842 ]
/Kids[ 1 0 R ]
/Count 1>>
endobj
10 0 obj
<</Type/XObject
/Subtype/Form
/BBox[0 0 82.7 23.1]
/Resources 9 0 R
/Length 18
/Filter/FlateDecode
>>
stream
some binary data
endstream
endobj
4 0 obj
<</Type/Annot/Subtype/Widget/F 4
/Rect[59.6 759.3 142.5 782.2]
/FT/Tx
/P 1 0 R
/T(currenttime)
/Ff 4096
/V <FEFF003100320033>
/DV <FEFF003100320033>
/DR<</Font 5 0 R>>
/DA(0 0 0 rg /F1 12 Tf)
/AP<<
/N 10 0 R
>>
>>
endobj
11 0 obj
<</Type/Catalog/Pages 6 0 R
/OpenAction[1 0 R /XYZ null null 0]
/Lang(sv-SE)
/AcroForm<</Fields[
4 0 R
]/DR 9 0 R/NeedAppearances true>>
>>
endobj
12 0 obj
<</Creator<FEFF005700720069007400650072>
/Producer<FEFF004C0069006200720065004F0066006600690063006500200035002E0033>
/CreationDate(D:20170606104859+02'00')>>
endobj
xref
0 13
0000000000 65535 f
0000001431 00000 n
0000000019 00000 n
0000000168 00000 n
0000001843 00000 n
0000001347 00000 n
0000001590 00000 n
0000000187 00000 n
0000000357 00000 n
0000001378 00000 n
0000001688 00000 n
0000002073 00000 n
0000002231 00000 n
trailer
<</Size 13/Root 11 0 R
/Info 12 0 R
/ID [ <5F5DD24A5E7FF740A8BB6B15F88EF602>
<5F5DD24A5E7FF740A8BB6B15F88EF602> ]
/DocChecksum /BFFAD3050AA9FF87945C97B9608B3C6C
>>
startxref
2406
%%EOF
在acrobat reader中对其进行编辑后(我将文本框的默认值从“123”更改为“12”),它将保存在1.6版本中,并插入一个有趣的x:xmpmeta信息。文档中还插入了很多空行。此时,它可以通过编程进行编辑。
%PDF-1.6
%âãÏÓ
7 0 obj
<</Linearized 1/L 6449/O 9/E 2599/N 1/T 6160/H [ 451 149]>>
endobj
13 0 obj
<</DecodeParms<</Columns 4/Predictor 12>>/Filter/FlateDecode/ID[<5F5DD24A5E7FF740A8BB6B15F88EF602><FAE65369E246E7409111A7D5BDED1E6F>]/Index[7 17]/Info 6 0 R/Length 52/Prev 6161/Root 8 0 R/Size 24/Type/XRef/W[1 2 1]>>stream
some binary data
endstream
endobj
startxref
0
%%EOF
23 0 obj
<</Filter/FlateDecode/I 92/Length 65/S 38/V 69>>stream
some binary data
endstream
endobj
8 0 obj
<</AcroForm<</DA(/Helv 0 Tf 0 g )/DR 22 0 R/Fields[14 0 R]>>/Lang(sv-SE)/Metadata 1 0 R/OpenAction[9 0 R/XYZ null null 0]/Pages 5 0 R/Type/Catalog>>
endobj
9 0 obj
<</Annots[14 0 R]/Contents 12 0 R/CropBox[0 0 595 842]/Group<</CS/DeviceRGB/I true/S/Transparency>>/MediaBox[0 0 595 842]/Parent 5 0 R/Resources 22 0 R/Rotate 0/Type/Page>>
endobj
10 0 obj
<</BBox[0.0 0.0 82.9 22.9]/Filter/FlateDecode/Length 68/Resources 15 0 R>>stream
some binary data
endstream
endobj
11 0 obj
<</Filter/FlateDecode/First 66/Length 1226/N 9/Type/ObjStm>>stream
some binary data
endstream
endobj
12 0 obj
<</Filter/FlateDecode/Length 78>>stream
some binary data
endstream
endobj
1 0 obj
<</Length 3146/Subtype/XML/Type/Metadata>>stream
<?xpacket begin="" id="W5M0MpCehiHzreSzNTczkc9d"?>
<x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="Adobe XMP Core 5.4-c005 78.147326, 2012/08/23-13:03:03 ">
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
<rdf:Description rdf:about=""
xmlns:xmp="http://ns.adobe.com/xap/1.0/"
xmlns:pdf="http://ns.adobe.com/pdf/1.3/"
xmlns:xmpMM="http://ns.adobe.com/xap/1.0/mm/"
xmlns:dc="http://purl.org/dc/elements/1.1/">
<xmp:CreateDate>2017-06-06T10:48:59+02:00</xmp:CreateDate>
<xmp:CreatorTool>Writer</xmp:CreatorTool>
<xmp:ModifyDate>2017-06-06T11:20:41+02:00</xmp:ModifyDate>
<xmp:MetadataDate>2017-06-06T11:20:41+02:00</xmp:MetadataDate>
<pdf:Producer>LibreOffice 5.3</pdf:Producer>
<xmpMM:DocumentID>uuid:fcdf7344-18ca-44b6-934c-8d5ab8fc8ea3</xmpMM:DocumentID>
<xmpMM:InstanceID>uuid:895fdc09-0aaa-4421-86b2-418c75f88d22</xmpMM:InstanceID>
<dc:format>application/pdf</dc:format>
</rdf:Description>
</rdf:RDF>
</x:xmpmeta>
<?xpacket end="w"?>
endstream
endobj
2 0 obj
<</Filter/FlateDecode/First 4/Length 48/N 1/Type/ObjStm>>stream
some binary data
endstream
endobj
3 0 obj
<</Filter/FlateDecode/First 4/Length 106/N 1/Type/ObjStm>>stream
some binary data
endstream
endobj
4 0 obj
<</DecodeParms<</Columns 3/Predictor 12>>/Filter/FlateDecode/ID[<5F5DD24A5E7FF740A8BB6B15F88EF602><FAE65369E246E7409111A7D5BDED1E6F>]/Info 6 0 R/Length 37/Root 8 0 R/Size 7/Type/XRef/W[1 2 0]>>stream
some binary data
endstream
endobj
startxref
116
%%EOF