Attachments in PDF document Leave feedback
GroupDocs.Watermark API allows you to extract attachments in PDF document. Following code performs this functionality.
AdvancedUsage.AddingWatermarks.AddWatermarksToPdf.PdfExtractAllAttachments
PdfLoadOptions loadOptions = new PdfLoadOptions();
// Specify an absolute or relative path to your document. Ex: @"C:\Docs\document.pdf"
using (Watermarker watermarker = new Watermarker("document.pdf", loadOptions))
{
PdfContent pdfContent = watermarker.GetContent<PdfContent>();
foreach (PdfAttachment attachment in pdfContent.Attachments)
{
Console.WriteLine("Name: {0}", attachment.Name);
Console.WriteLine("Description: {0}", attachment.Description);
Console.WriteLine("File type: {0}", attachment.GetDocumentInfo().FileType);
// Save the attached file on disk
File.WriteAllBytes(Path.Combine("SampleFiles\Output", attachment.Name), attachment.Content);
}
}
The API also allows you to add attachments to the PDF document. Following code snippet shows how to remove an attachment
AdvancedUsage.AddingWatermarks.AddWatermarksToPdf.PdfAddAttachment
PdfLoadOptions loadOptions = new PdfLoadOptions();
// Specify an absolute or relative path to your document. Ex: @"C:\Docs\document.pdf"
using (Watermarker watermarker = new Watermarker("document.pdf", loadOptions))
{
PdfContent pdfContent = watermarker.GetContent<PdfContent>();
// Add the attachment
pdfContent.Attachments.Add(File.ReadAllBytes("sample.docx"), "sample doc", "sample doc as attachment");
// Save changes
watermarker.Save("document.pdf");
}
The API also allows you to remove attachments from the PDF document. Following code snippet shows how to remove an attachment.
AdvancedUsage.AddingWatermarks.AddWatermarksToPdf.PdfRemoveAttachment
PdfLoadOptions loadOptions = new PdfLoadOptions();
// Specify an absolute or relative path to your document. Ex: @"C:\Docs\document.pdf"
using (Watermarker watermarker = new Watermarker("document.pdf", loadOptions))
{
PdfContent pdfContent = watermarker.GetContent<PdfContent>();
for (int i = pdfContent.Attachments.Count - 1; i >= 0; i--)
{
PdfAttachment attachment = pdfContent.Attachments[i];
// Remove all attached pdf files with a particular name
if (attachment.Name.Contains("sample") && attachment.GetDocumentInfo().FileType == FileType.DOCX)
{
pdfContent.Attachments.RemoveAt(i);
}
}
watermarker.Save("document.pdf");
}
In case you want to search for all the images attachments in a PDF document, you can use GroupDocs.Watermark. Following code sample shows how to search images attachments of PDF document.
AdvancedUsage.AddingWatermarks.AddWatermarksToPdf.PdfSearchImageInAttachment
PdfLoadOptions loadOptions = new PdfLoadOptions();
// Specify an absolute or relative path to your document. Ex: @"C:\Docs\document.pdf"
using (Watermarker watermarker = new Watermarker("document.pdf", loadOptions))
{
// Consider only the attached images
watermarker.SearchableObjects.PdfSearchableObjects = PdfSearchableObjects.AttachedImages;
// Search for similar images
WatermarkableImageCollection possibleWatermarks = watermarker.GetImages();
Console.WriteLine("Found {0} image(s).", possibleWatermarks.Count);
}
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