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PdfDocument.Info is null - richard.campbell@smokeball.com
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richard  
#1 Posted : Sunday, September 29, 2019 10:43:02 PM(UTC)
richard

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Hi Support,

We use the PdfDocument.Info dictionary to store some custom data.

After calling PdfDocument.Load(..), we noticed that some documents load with the PdfDocument.Info dictionary set to null. We would have expected an empty dictionary.

Is there anyway to create a new Info dictionary in the PdfDocument when its null (as we noticed the Info property on PdfDocument is readonly)?

Regards,
Richard
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Paul Rayman  
#2 Posted : Monday, September 30, 2019 12:33:46 AM(UTC)
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Hi,

Yes it is possible

Code:
var myinfo = PdfTypeDictionary.Create();
var list = PdfIndirectList.FromPdfDocument(doc);
list.Add(myinfo);
doc.Trailer.SetIndirectAt("Info", list, myinfo);


Now you can use the myinfo dictionary in the same way as if it were doc.Info.
When you save and then reload the document, this dictionary will be accessible through the doc.Info property.
Properties such as doc.Title, doc.Author, doc.Subject, etc will also work fine.

Code:
doc.Save(@"e:\copy.pdf", SaveFlags.NoIncremental);
doc = PdfDocument.Load(@"e:\copy.pdf");
doc.Info //not  null now;
doc.Title = "Title";

Edited by user Monday, September 30, 2019 12:36:56 AM(UTC)  | Reason: Not specified
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richard  
#3 Posted : Monday, September 30, 2019 2:48:08 AM(UTC)
richard

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Awesome. Thank you for the prompt reply.
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