PDF iTextSharpを使用してドキュメントにページを追加する
既存のPDF単純なテキストを含むドキュメントにページを追加したいと思います。
インターネットで見つけた次のコードを試してみましたが、これまでのところ機能していません。
PdfReader reader = new PdfReader("1.pdf");
Document document = new Document(reader.GetPageSize(1));
PdfCopy copier = new PdfCopy(doc, new FileStream("2.pdf", FileMode.Create));
for (int pageCounter = 1; pageCounter < reader.NumberOfPages + 1; pageCounter++)
{
//byte[] page = reader.GetPageContent(pageCounter);
copier.AddPage(copier.GetImportedPage(reader, pageCounter));
}
copier.NewPage();
copier.Add(new Paragraph("This is added text"));
document.Close();
reader.Close();
これを正しく行う方法を教えてください。
private static string AddCommentsToFile(string fileName, string userComments)
{
string outputFileName = Path.GetTempFileName();
//Step 1: Create a Docuement-Object
Document document = new Document();
try
{
//Step 2: we create a writer that listens to the document
PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(outputFileName, FileMode.Create));
//Step 3: Open the document
document.Open();
PdfContentByte cb = writer.DirectContent;
//The current file path
string filename = fileName;
// we create a reader for the document
PdfReader reader = new PdfReader(filename);
for (int pageNumber = 1; pageNumber < reader.NumberOfPages + 1; pageNumber++)
{
document.SetPageSize(reader.GetPageSizeWithRotation(1));
document.NewPage();
//Insert to Destination on the first page
if (pageNumber == 1)
{
Chunk fileRef = new Chunk(" ");
fileRef.SetLocalDestination(filename);
document.Add(fileRef);
}
PdfImportedPage page = writer.GetImportedPage(reader, pageNumber);
int rotation = reader.GetPageRotation(pageNumber);
if (rotation == 90 || rotation == 270)
{
cb.AddTemplate(page, 0, -1f, 1f, 0, 0, reader.GetPageSizeWithRotation(pageNumber).Height);
}
else
{
cb.AddTemplate(page, 1f, 0, 0, 1f, 0, 0);
}
}
// Add a new page to the pdf file
document.NewPage();
Paragraph paragraph = new Paragraph();
Font titleFont = new Font(iTextSharp.text.Font.FontFamily.HELVETICA
, 15
, iTextSharp.text.Font.BOLD
, BaseColor.BLACK
);
Chunk titleChunk = new Chunk("Comments", titleFont);
paragraph.Add(titleChunk);
document.Add(paragraph);
paragraph = new Paragraph();
Font textFont = new Font(iTextSharp.text.Font.FontFamily.HELVETICA
, 12
, iTextSharp.text.Font.NORMAL
, BaseColor.BLACK
);
Chunk textChunk = new Chunk(userComments, textFont);
paragraph.Add(textChunk);
document.Add(paragraph);
}
catch (Exception e)
{
throw e;
}
finally
{
document.Close();
}
return outputFileName;
}
このコードを試してください：既存のPDFを含む新しいページを追加し、その最後のページに透かしテキストを追加します。
private string AddWaterMarkPageToFile(string fileName, string userComments)
{
string outputFileName = Path.GetTempFileName() + ".pdf";
//Step 1: Create a Docuement-Object
Document document = new Document();
try
{
//Step 2: we create a writer that listens to the document
PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(outputFileName, FileMode.Create));
//Step 3: Open the document
document.Open();
PdfContentByte cb = writer.DirectContent;
//The current file path
string filename = fileName;
// we create a reader for the document
PdfReader reader = new PdfReader(filename);
for (int pageNumber = 1; pageNumber < reader.NumberOfPages + 1; pageNumber++)
{
document.SetPageSize(reader.GetPageSizeWithRotation(1));
document.NewPage();
//Insert to Destination on the first page
if (pageNumber == 1)
{
Chunk fileRef = new Chunk(" ");
fileRef.SetLocalDestination(filename);
document.Add(fileRef);
}
PdfImportedPage page = writer.GetImportedPage(reader, pageNumber);
int rotation = reader.GetPageRotation(pageNumber);
if (rotation == 90 || rotation == 270)
{
cb.AddTemplate(page, 0, -1f, 1f, 0, 0, reader.GetPageSizeWithRotation(pageNumber).Height);
}
else
{
cb.AddTemplate(page, 1f, 0, 0, 1f, 0, 0);
}
}
// Add a new page to the pdf file
document.NewPage();
float fontSize = 80;
float xPosition = iTextSharp.text.PageSize.A4.Width / 2;
float yPosition = (iTextSharp.text.PageSize.A4.Height - 140f) / 2;
float angle = 45;
PdfContentByte under = writer.DirectContentUnder;
BaseFont baseFont = BaseFont.CreateFont(BaseFont.HELVETICA, BaseFont.WINANSI, BaseFont.EMBEDDED);
under.BeginText();
under.SetColorFill(BaseColor.LIGHT_GRAY);
under.SetFontAndSize(baseFont, fontSize);
under.ShowTextAligned(PdfContentByte.ALIGN_CENTER, userComments, xPosition, yPosition, angle);
under.EndText();
}
catch (Exception e)
{
throw e;
}
finally
{
document.Close();
}
return outputFileName;
}
PdfCopyを使用してページを追加することはできません。新しいpdfを作成して追加する必要があります（必要な場合は、PdfCopyがpdfのマージに最適です）。
フッターを追加する方法の例も追加しました。
PdfReader reader = new PdfReader("1.pdf");
Document document = new Document(reader.GetPageSize(1));
PdfCopy copier = new PdfCopy(doc, new FileStream("2.pdf", FileMode.Create));
for (int pageCounter = 1; pageCounter < reader.NumberOfPages + 1; pageCounter++)
{
// get page
PdfImportedPage page = copier.GetImportedPage(reader, pageCounter)
// add content to imported page
PageStamp ps = pdfCopy.CreatePageStamp(page);
PdfContentByte cb = ps.GetOverContent();
// set color
cb.SetColorFill(BaseColor.BLACK);
// get font
BaseFont baseFont = BaseFont.CreateFont(string.Format("{0}\\Fonts\\arialuni.ttf", Environment.GetEnvironmentVariable("windir"), BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
cb.SetFontAndSize(baseFont, 12);
cb.BeginText();
cb.ShowTextAligned(PdfContentByte.ALIGN_CENTER, printLangString, 100f, 40f, 0f);
cb.EndText();
// Accept changes
ps.AlterContents();
// add page
copier.AddPage(page);
}
using (var ms = new MemoryStream())
{
Document doc = new Document(PageSize.A4);
PdfWriter writer = PdfWriter.GetInstance(doc, ms);
writer.CloseStream = false;
doc.Open();
doc.NewPage();
doc.Add(new Paragraph(error, fontRed));
doc.Close();
writer.Close();
ms.Seek(0, SeekOrigin.Begin);
PdfReader rd = new PdfReader(ms);
for (int pageCounter = 1; pageCounter < reader.NumberOfPages + 1; pageCounter++)
{
copier.AddPage(copier.GetImportedPage(rd, pageCounter));
}
rd.Close();
}
document.Close();
reader.Close();