/// <summary>
/// Use this method to write XMP data to a new PDF
/// </summary>
/// <param name="writer"></param>
private void CreateXmpMetadata(iTextSharp.text.pdf.PdfWriter writer)
{
// Set up the buffer to hold the XMP metadata
byte[] buffer = new byte[65536];
System.IO.MemoryStream ms = new System.IO.MemoryStream(buffer, true);
try
{
// XMP supports a number of different schemas, which are made available by iTextSharp.
// Here, the Dublin Core schema is chosen.
iTextSharp.text.xml.xmp.XmpSchema dc = new iTextSharp.text.xml.xmp.DublinCoreSchema();
// Add Dublin Core attributes
iTextSharp.text.xml.xmp.LangAlt title = new iTextSharp.text.xml.xmp.LangAlt();
title.Add("x-default", "My Science Project");
dc.SetProperty(iTextSharp.text.xml.xmp.DublinCoreSchema.TITLE, title);
// Dublin Core allows multiple authors, so we create an XmpArray to hold the values
iTextSharp.text.xml.xmp.XmpArray author = new iTextSharp.text.xml.xmp.XmpArray(iTextSharp.text.xml.xmp.XmpArray.ORDERED);
author.Add("M. Lichtenberg");
dc.SetProperty(iTextSharp.text.xml.xmp.DublinCoreSchema.CREATOR, author);
// Multiple subjects are also possible, so another XmpArray is used
iTextSharp.text.xml.xmp.XmpArray subject = new iTextSharp.text.xml.xmp.XmpArray(iTextSharp.text.xml.xmp.XmpArray.UNORDERED);
subject.Add("paper airplanes");
subject.Add("science project");
dc.SetProperty(iTextSharp.text.xml.xmp.DublinCoreSchema.SUBJECT, subject);
// Create an XmpWriter using the MemoryStream defined earlier
iTextSharp.text.xml.xmp.XmpWriter xmp = new iTextSharp.text.xml.xmp.XmpWriter(ms);
xmp.AddRdfDescription(dc); // Add the completed metadata definition to the XmpWriter
xmp.Close(); // This flushes the XMP metadata into the buffer
//---------------------------------------------------------------------------------
// Shrink the buffer to the correct size (discard empty elements of the byte array)
int bufsize = buffer.Length;
int bufcount = 0;
foreach (byte b in buffer)
{
if (b == 0)
{
break;
}
bufcount++;
}
System.IO.MemoryStream ms2 = new System.IO.MemoryStream(buffer, 0, bufcount);
buffer = ms2.ToArray();
//---------------------------------------------------------------------------------
// Add all of the XMP metadata to the PDF doc that we're building
writer.XmpMetadata = buffer;
}
catch (Exception ex)
{
throw ex;
}
finally
{
ms.Close();
ms.Dispose();
}
}
/// <summary>
/// Use this method to write XMP data to a new PDF
/// </summary>
/// <param name="writer"></param>
private void CreateXmpMetadata(iTextSharp.text.pdf.PdfWriter writer)
{
// Set up the buffer to hold the XMP metadata
byte[] buffer = new byte[65536];
System.IO.MemoryStream ms = new System.IO.MemoryStream(buffer, true);
try
{
// XMP supports a number of different schemas, which are made available by iTextSharp.
// Here, the Dublin Core schema is chosen.
iTextSharp.text.xml.xmp.XmpSchema dc = new iTextSharp.text.xml.xmp.DublinCoreSchema();
// Add Dublin Core attributes
iTextSharp.text.xml.xmp.LangAlt title = new iTextSharp.text.xml.xmp.LangAlt();
title.Add("x-default", "My Science Project");
dc.SetProperty(iTextSharp.text.xml.xmp.DublinCoreSchema.TITLE, title);
// Dublin Core allows multiple authors, so we create an XmpArray to hold the values
iTextSharp.text.xml.xmp.XmpArray author = new iTextSharp.text.xml.xmp.XmpArray(iTextSharp.text.xml.xmp.XmpArray.ORDERED);
author.Add("M. Lichtenberg");
dc.SetProperty(iTextSharp.text.xml.xmp.DublinCoreSchema.CREATOR, author);
// Multiple subjects are also possible, so another XmpArray is used
iTextSharp.text.xml.xmp.XmpArray subject = new iTextSharp.text.xml.xmp.XmpArray(iTextSharp.text.xml.xmp.XmpArray.UNORDERED);
subject.Add("paper airplanes");
subject.Add("science project");
dc.SetProperty(iTextSharp.text.xml.xmp.DublinCoreSchema.SUBJECT, subject);
// Create an XmpWriter using the MemoryStream defined earlier
iTextSharp.text.xml.xmp.XmpWriter xmp = new iTextSharp.text.xml.xmp.XmpWriter(ms);
xmp.AddRdfDescription(dc); // Add the completed metadata definition to the XmpWriter
xmp.Close(); // This flushes the XMP metadata into the buffer
//---------------------------------------------------------------------------------
// Shrink the buffer to the correct size (discard empty elements of the byte array)
int bufsize = buffer.Length;
int bufcount = 0;
foreach (byte b in buffer)
{
if (b == 0) break;
bufcount++;
}
System.IO.MemoryStream ms2 = new System.IO.MemoryStream(buffer, 0, bufcount);
buffer = ms2.ToArray();
//---------------------------------------------------------------------------------
// Add all of the XMP metadata to the PDF doc that we're building
writer.XmpMetadata = buffer;
}
catch (Exception ex)
{
throw ex;
}
finally
{
ms.Close();
ms.Dispose();
}
}
