In this article, we are going to learn how to add Meta information of PDF file using itextsharp in asp.net with C#. First, you need to download iTextSharp dll from the internet. Click on the link to download https://github.com/itext/itextsharp.

Related article:

Once file is downloaded, extract it, now you will find 6 more .rar file. Again extract itextsharp-dll-core.rar file, after that add reference of itextsharp.dll to your project.

In code-behind file:

Add below nampespaces.

using System.IO;
using iTextSharp.text;
using iTextSharp.text.pdf;

Complete C# code:

protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
    {
        AddMetaInfo();
    }
}
public void AddMetaInfo()
{
// create filestream object
    FileStream fs = new FileStream(Server.MapPath("Example.pdf"), FileMode.Create);

// create document object
    Document doc = new Document();

// create PdfWriter instance which will write at file filestream
    PdfWriter.GetInstance(doc, fs);

// opening the dociment
    doc.Open();

// creating paragraph object
    Paragraph para = new Paragraph("Add meta information");
    para.Alignment = Element.ALIGN_CENTER;

// Adding meta info 
    doc.AddTitle("C# iTextSharp");
    doc.AddAuthor("ASPArticles.com");
    doc.AddSubject("Adding meta information of pdf");
    doc.AddKeywords("ASP.Net Articles, iTextSharp, PDF, add Meta Info to PDF");
    doc.AddCreator("iTextSharp dll");

// adding pargraph to document
    doc.Add(para);

    doc.Close();
}

Once pdf file is generated, Open the file-> go to file menu -> click on Properties then you will see the meta information as shown below.