static void Main(string[] args)
{
// If using Professional version, put your serial key below.
ComponentInfo.SetLicense("FREE-LIMITED-KEY");
PdfDocument document = PdfDocument.Load("Reading.pdf");
// Get document's trailer dictionary.
var trailer = document.GetDictionary();
// Get document catalog dictionary from the trailer.
var catalog = (PdfDictionary)((PdfIndirectObject)trailer[PdfName.Create("Root")]).Value;
// Either retrieve "PieceInfo" entry value from document catalog or create a page-piece dictionary and set it to document catalog under "PieceInfo" entry.
PdfDictionary pieceInfo;
var pieceInfoKey = PdfName.Create("PieceInfo");
var pieceInfoValue = catalog[pieceInfoKey];
switch (pieceInfoValue.ObjectType)
{
case PdfBasicObjectType.Dictionary:
pieceInfo = (PdfDictionary)pieceInfoValue;
break;
case PdfBasicObjectType.IndirectObject:
pieceInfo = (PdfDictionary)((PdfIndirectObject)pieceInfoValue).Value;
break;
case PdfBasicObjectType.Null:
pieceInfo = PdfDictionary.Create();
catalog[pieceInfoKey] = PdfIndirectObject.Create(pieceInfo);
break;
default:
throw new InvalidOperationException("PieceInfo entry must be dictionary.");
}
// Create page-piece data dictionary for "GemBox.Pdf" conforming product and set it to page-piece dictionary.
var data = PdfDictionary.Create();
pieceInfo[PdfName.Create("GemBox.Pdf")] = data;
// Create a private data dictionary that will hold private data that "GemBox.Pdf" conforming product understands.
var privateData = PdfDictionary.Create();
data[PdfName.Create("Data")] = privateData;
// Set "Title" and "Version" entries to private data.
privateData[PdfName.Create("Title")] = PdfString.Create(ComponentInfo.Title);
privateData[PdfName.Create("Version")] = PdfString.Create(ComponentInfo.Version);
// Specify date of the last modification of "GemBox.Pdf" private data (required by PDF specification).
data[PdfName.Create("LastModified")] = PdfString.Create("D:" + DateTimeOffset.Now.ToString("yyyyMMddHHmmssK", CultureInfo.InvariantCulture).Replace(':', '\'') + "'", PdfEncoding.ASCII, PdfStringForm.Literal);
document.SaveOptions.CloseOutput = true;
document.Save("Basic Objects.pdf");
}
static void Main()
{
// If using Professional version, put your serial key below.
ComponentInfo.SetLicense("FREE-LIMITED-KEY");
using (var document = new PdfDocument())
{
// Specify content stream's content as a sequence of content stream operands and operators.
var content = new StringBuilder();
// Begin a text object.
content.AppendLine("BT");
// Set the font and font size to use, installing them as parameters in the text state.
// In this case, the font resource identified by the name F1 specifies the font externally known as Helvetica.
content.AppendLine("/F1 12 Tf");
// Specify a starting position on the page, setting parameters in the text object.
content.AppendLine("70 760 Td");
// Paint the glyphs for a string of characters at that position.
content.AppendLine("(GemBox.Pdf) Tj");
// End the text object.
content.AppendLine("ET");
// Create content stream and write content to it.
var contentStream = PdfStream.Create();
contentStream.Filters.AddFilter(PdfFilterType.FlateDecode);
using (var stream = contentStream.Open(PdfStreamDataMode.Write, PdfStreamDataState.Decoded))
{
var contentBytes = PdfEncoding.Byte.GetBytes(content.ToString());
stream.Write(contentBytes, 0, contentBytes.Length);
}
// Create font dictionary for Standard Type 1 'Helvetica' font.
var font = PdfDictionary.Create();
font[PdfName.Create("Type")] = PdfName.Create("Font");
font[PdfName.Create("Subtype")] = PdfName.Create("Type1");
font[PdfName.Create("BaseFont")] = PdfName.Create("Helvetica");
// Add font dictionary to resources.
var fontResources = PdfDictionary.Create();
fontResources[PdfName.Create("F1")] = PdfIndirectObject.Create(font);
var resources = PdfDictionary.Create();
resources[PdfName.Create("Font")] = fontResources;
// Create new empty A4 page.
var page = document.Pages.Add();
// Set contents and resources of a page.
var pageDictionary = page.GetDictionary();
pageDictionary[PdfName.Create("Contents")] = PdfIndirectObject.Create(contentStream);
pageDictionary[PdfName.Create("Resources")] = resources;
document.Save("Content Stream.pdf");
}
}
