How to get number of pages of a PDF file in C#

When you want to know how many pages a PDF document has, you can get help from the PDF API Spire.PDF for .NET. Spire.PDF has powerful functions of working with pages. You can insert and remove blank pages from the PDF file, set PDF page properties and etc. This article will focus on show you how to get the number of pages of a PDF file.

Make sure Spire.PDF for .NET has been installed correctly and then add Spire.Pdf.dll as reference in the downloaded Bin folder though the below path: "..\Spire.Pdf\Bin\NET4.0\ Spire.Pdf.dll".

By using the Document class, you can use Count property of the Pages Collection of Document object to get the total number of pages in the document.

Here comes to the code snippet of get the number of pages of a PDF file:

//create PDFDocument and load from file
PdfDocument document = new PdfDocument();
string FileName = "sample.pdf";
document.LoadFromFile(FileName);

//get page count
int PageNumber = document.Pages.Count;
Console.WriteLine("Page count: {0}", PageNumber);

//remove one page of document
document.Pages.RemoveAt(1);

//get the number of pages
PageNumber = document.Pages.Count;
Console.WriteLine("Second page count:{0}", PageNumber);
Console.ReadLine();

//close the document
document.Close();

Effective Screenshot of the results when get the number of the pages.

How to get number of pages of a PDF file in C#

The original PDF file:

How to get number of pages of a PDF file in C#