Page Number Stamps In PDF File

In this tutorial, we will guide you step by step on how to add page number stamps in PDF file using Aspose.PDF for .NET. We’ll use the provided C# source code to open an existing PDF document, create a page number stamp, set its properties, and add it to a specific page in the PDF file.

Step 1: Setting up the environment

Before you begin, make sure you have the following:

An installed .NET development environment.
The Aspose.PDF library for .NET downloaded and referenced in your project.

Step 2: Loading the existing PDF document

The first step is to load the existing PDF document into your project. Here’s how:

// The path to the documents directory.
string dataDir = "YOUR DOCUMENTS DIRECTORY";

// Open the existing PDF document
Document pdfDocument = new Document(dataDir + "PageNumberStamp.pdf");

Be sure to replace “YOUR DOCUMENTS DIRECTORY” with the actual path to the directory where your PDF document is located.

Step 3: Creating and Configuring the Page Numbering Stamp

Now that the PDF document is loaded, we can create a page numbering buffer and configure it according to our needs. Here’s how:

// Create a page number buffer
PageNumberStamp pageNumberStamp = new PageNumberStamp();

// Define if the buffer is in the background or not
pageNumberStamp.Background = false;

// Format of the page numbering buffer
pageNumberStamp.Format = "Page # of " + pdfDocument.Pages.Count;

// Bottom margin of page numbering buffer
pageNumberStamp.BottomMargin = 10;

// Horizontal alignment of the page numbering buffer
pageNumberStamp.HorizontalAlignment = HorizontalAlignment.Center;

// Start number of page numbering
pageNumberStamp.StartingNumber = 1;

// Set page number buffer text properties
pageNumberStamp.TextState.Font = FontRepository.FindFont("Arial");
pageNumberStamp.TextState.FontSize = 14.0F;
pageNumberStamp.TextState.FontStyle = FontStyles.Bold;
pageNumberStamp.TextState.FontStyle = FontStyles.Italic;
pageNumberStamp.TextState.ForegroundColor = Color.Aqua;

The above code creates a page number stamp with properties like page number format, bottom margin, horizontal alignment, starting number and text properties.

Step 4: Adding the page number stamp to a specific page

Once the page number stamp is configured, we can add it to a specific page of the PDF document. Here’s how:

// Add the page number buffer to a specific page
pdfDocument.Pages[1].AddStamp(pageNumberStamp);

The above code adds the page number stamp to the first page of the PDF document. You can change the page number as needed.

Step 5: Saving the modified PDF document

Once the page number stamp is added to the PDF document, we can save the modified PDF document. Here’s how:

// Save the modified PDF document
pdfDocument.Save(dataDir + "PageNumberStamp_out.pdf");

Be sure to replace “YOUR DOCUMENTS DIRECTORY” with the actual path to the directory where you want to save the edited PDF document.

Sample source code for Page Number Stamps using Aspose.PDF for .NET


// The path to the documents directory.
string dataDir = "YOUR DOCUMENT DIRECTORY";

// Open document
Document pdfDocument = new Document(dataDir+ "PageNumberStamp.pdf");

// Create page number stamp
PageNumberStamp pageNumberStamp = new PageNumberStamp();

// Whether the stamp is background
pageNumberStamp.Background = false;
pageNumberStamp.Format = "Page # of " + pdfDocument.Pages.Count;
pageNumberStamp.BottomMargin = 10;
pageNumberStamp.HorizontalAlignment = HorizontalAlignment.Center;
pageNumberStamp.StartingNumber = 1;

// Set text properties
pageNumberStamp.TextState.Font = FontRepository.FindFont("Arial");
pageNumberStamp.TextState.FontSize = 14.0F;
pageNumberStamp.TextState.FontStyle = FontStyles.Bold;
pageNumberStamp.TextState.FontStyle = FontStyles.Italic;
pageNumberStamp.TextState.ForegroundColor = Color.Aqua;

// Add stamp to particular page
pdfDocument.Pages[1].AddStamp(pageNumberStamp);
dataDir = dataDir + "PageNumberStamp_out.pdf";

// Save output document
pdfDocument.Save(dataDir);
Console.WriteLine("\nPage number stamp added successfully.\nFile saved at " + dataDir);

Conclusion

Congratulation ! You have learned how to add page number stamps to a PDF document using Aspose.PDF for .NET. You can now personalize your PDF documents by adding clear and informative page numbers.

FAQ’s for page number stamps in PDF file

Q: What is a Page Number Stamp, and how is it used to add page numbers to a PDF file?

A: A Page Number Stamp is a feature in Aspose.PDF that allows you to add dynamic page numbers to specific pages of a PDF document. In this tutorial, it’s achieved by creating a PageNumberStamp object, configuring its properties, and adding it to a designated page.

Q: How does the provided C# source code accomplish adding page number stamps to a PDF file?

A: The code demonstrates how to load an existing PDF document, create a PageNumberStamp, set various properties (such as format, font, alignment, etc.), and then add the stamp to a specific page. The stamp automatically calculates the total page count and inserts the correct page numbers.

Q: Can I customize the appearance of the page number, such as font style, color, and size?

A: Absolutely, you can customize the appearance of the page number stamp by adjusting properties like font, font size, font style (bold, italic, etc.), and text color.

Q: Is it possible to add page number stamps to multiple pages within a PDF document?

A: Yes, you can add page number stamps to multiple pages by creating multiple PageNumberStamp objects and adding each one to the desired pages.

Q: Can I choose whether the page number stamp appears as part of the page’s content or as a background element?

A: Yes, you can control whether the page number stamp appears as part of the page’s content or as a background element by setting the Background property of the PageNumberStamp.

Q: How do I specify the format of the page number, including the total page count?

A: The code uses the Format property of the PageNumberStamp to specify the format of the page number. The macro “# of” is used to represent the total page count.

Q: What happens if I add the same page number stamp to multiple pages?

A: Adding the same PageNumberStamp instance to multiple pages will display the correct page numbers for each page. The stamp automatically adjusts the page number and total page count.

Q: Can I add page number stamps to header or footer sections of a PDF document?

A: While PageNumberStamps are typically added directly to the page’s content, you can use FloatingBox or other techniques to position them in header or footer sections.

Q: How do I specify the position of the page number stamp on the page?

A: The BottomMargin and HorizontalAlignment properties of the PageNumberStamp allow you to control the position of the stamp within the page.

Q: What if I want to start page numbering from a different number rather than 1?

A: You can set the StartingNumber property of the PageNumberStamp to specify the starting page number.

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