问题:

How can I set an A4 document in landscape (horizontal) format in iTextSharp?

回答1:

You can set the page size to a rotated A4. E.g. (assuming PDF, but should apply regardless):

iTextSharp.text.Document doc;

// ...initialize 'doc'...

// Set the page size
doc.SetPageSize(iTextSharp.text.PageSize.A4.Rotate());

I've done this with PDF without trouble, haven't tried it with other doc types.

You can initialize a new document like that:

Document doc = new Document(iTextSharp.text.PageSize.A4.Rotate(), 10, 10, 10, 10);

In this mode all pages will be in landscape mode.

To change the layout of the page inside the document you can use:

doc.SetPageSize(iTextSharp.text.PageSize.A4); // for vertical layout
doc.SetPageSize(iTextSharp.text.PageSize.A4.Rotate()); // for horizontal layout