PDFsharp: Is there a way to generate “Page X of Y” in the header of the page?

问题

It seems rather simple, but I can't find something like getPageCount() in the API. I can get it to return the current page, but not the total number of pages. Perhaps I'm missing it?

I would like to somehow be able to print 'Page 1 of 9' at the top of every page, where '1' of course is the current page number.

回答1:

With PDFsharp it's up to you.

I presume you are using MigraDoc: With MigraDoc you can add a page header. Add paragraph.AddPageField() for the current page number and paragraph.AddNumPagesField() for the total page count.

Sample that uses AddPageField

Code snippet from the sample:

// Create a paragraph with centered page number. See definition of style "Footer".
Paragraph paragraph = new Paragraph();
paragraph.AddTab();
paragraph.AddPageField();

// Add paragraph to footer for odd pages.
section.Footers.Primary.Add(paragraph);
// Add clone of paragraph to footer for odd pages. Cloning is necessary because an object must
// not belong to more than one other object. If you forget cloning an exception is thrown.
section.Footers.EvenPage.Add(paragraph.Clone());

Code snippet that sets the tab stop (assuming DIN A 4 with a body with of 16 cm):

style = document.Styles[StyleNames.Footer]; 
style.ParagraphFormat.AddTabStop("8cm", TabAlignment.Center);

Both snippets taken from the linked site. Sample code is also available for download.

回答2:

Make sure to include the using MigraDoc.DocumentObjectModel; statement in your class.

Document document = new Document();
Section section = document.AddSection();

Paragraph paragraph = new Paragraph();
paragraph.AddText("Page ");
paragraph.AddPageField();
paragraph.AddText(" of ");
paragraph.AddNumPagesField();

section.Headers.Primary.Add(paragraph);

回答3:

I know this question is old and has an accepted answer, however the question comes up among the first when searching for a PDFsharp solution.

For the record, achieving this in PDFsharp is easy. The PdfDocument class, found under the PdfSharp.Pdf namespace contains a collection of pages (PdfDocument.Pages). All you have to do is iterate through the collection and add the page counter somewhere on every page, using a XGraphics object, that you can instantiate using XGraphics.FromPdfPage(PdfPage).

using PdfSharp.Pdf; // PdfDocument, PdfPage
using PdfSharp.Drawing; // XGraphics, XFont, XBrush, XRect
                        // XStringFormats

// Create a new PdfDocument.
PdfDocument document = new PdfDocument();
// Add five pages to the document.
for(int i = 0; i < 5; ++i)
    document.AddPage();

// Make a font and a brush to draw the page counter.
XFont font = new XFont("Verdana", 8);
XBrush brush = XBrushes.Black;

// Add the page counter.
string noPages = document.Pages.Count.ToString();
for(int i = 0; i < document.Pages.Count; ++i)
{
    PdfPage page = document.Pages[i];

    // Make a layout rectangle.
    XRect layoutRectangle = new XRect(0/*X*/, page.Height-font.Height/*Y*/, page.Width/*Width*/, font.Height/*Height*/);

    using (XGraphics gfx = XGraphics.FromPdfPage(page))
    {
        gfx.DrawString(
            "Page " + (i+1).ToString() + " of " + noPages,
            font,
            brush,
            layoutRectangle,
            XStringFormats.Center);
    }
}

It's worth noting that if a XGraphics object already exists for a given page, before creating a new one, the old one needs to be disposed. This would fail:

PdfDocument document = new PdfDocument();
PdfPage page = document.AddPage();

XGraphics gfx1 = XGraphics.FromPage(page);
XGraphics gfx2 = XGraphics.FromPage(page);

来源：https://stackoverflow.com/questions/19498831/pdfsharp-is-there-a-way-to-generate-page-x-of-y-in-the-header-of-the-page

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