Modify and append content to existing PDF using iTextSharp in C# .Net

Hi ashhadsaud,

Please Refer below code:

String pathin = "D:\\PDF\\Test.pdf";
String pathout = "D:\\PDF\\Test_1.pdf";

PdfReader reader = new PdfReader(pathin);
PdfStamper stamper = new PdfStamper(reader, new FileStream(pathout, FileMode.Create));

Phrase phrase = null;
PdfPCell cell = null;
PdfPTable table = null;

table = new PdfPTable(2);
table.HorizontalAlignment = Element.ALIGN_LEFT;
table.SetWidths(new float[] { 0.3f, 1f });
table.SpacingBefore = 20f;

cell = PhraseCell(new Phrase("Cell 1", FontFactory.GetFont("Arial", 12, Font.NORMAL, BaseColor.BLACK)), PdfPCell.ALIGN_CENTER);
table.AddCell(cell);

cell = PhraseCell(new Phrase("Cell 2", FontFactory.GetFont("Arial", 12, Font.NORMAL, BaseColor.BLACK)), PdfPCell.ALIGN_CENTER);
table.AddCell(cell);

ColumnText ct = new ColumnText(stamper.GetOverContent(1));
ct.AddElement(table);
Rectangle rect = new Rectangle(46, 190, 530, 36);
ct.SetSimpleColumn(rect);
ct.Go();
stamper.Close();

This is Dummy Table you can create logic for you table with c# based on your table structure.

Thanks

Hi ashhadsaud,

I have created one sample that full-fill your requirement.

Code

protected void AddDataTableToPDF(object sender, EventArgs e)
{
    String pathin = @"F:\Users\dharmendra\Desktop\test.pdf";
    String pathout = @"F:\Users\dharmendra\Desktop\test1.pdf";
    PdfReader reader = new PdfReader(pathin);
    PdfStamper stamper = new PdfStamper(reader, new FileStream(pathout, FileMode.Create));
    PdfPCell cell = null;
    PdfPTable table = null;
    DataTable dt = GetDataTable();
    if (dt != null)
    {
        Font font8 = FontFactory.GetFont("ARIAL", 7);
        table = new PdfPTable(dt.Columns.Count);
        cell = new PdfPCell(new Phrase(new Chunk("ID", font8)));
        table.AddCell(cell);
        cell = new PdfPCell(new Phrase(new Chunk("Name", font8)));
        table.AddCell(cell);
        cell = new PdfPCell(new Phrase(new Chunk("Country", font8)));
        table.AddCell(cell);
        for (int rows = 0; rows < dt.Rows.Count; rows++)
        {
            for (int column = 0; column < dt.Columns.Count; column++)
            {
                cell = new PdfPCell(new Phrase(new Chunk(dt.Rows[rows][column].ToString(), font8)));
                table.AddCell(cell);
            }
        }
    }
    ColumnText ct = new ColumnText(stamper.GetOverContent(1));
    ct.AddElement(table);
    Rectangle rect = new Rectangle(46, 190, 530, 36);
    ct.SetSimpleColumn(36, 36, PageSize.A4.Width - 36, PageSize.A4.Height - 175);
    ct.Go();
    stamper.Close();
    reader.Close();
}
private static PdfPCell PhraseCell(Phrase phrase, int align)
{
    PdfPCell cell = new PdfPCell(phrase);
    cell.BorderColor = Color.WHITE;
    cell.VerticalAlignment = PdfCell.ALIGN_TOP;
    cell.HorizontalAlignment = align;
    cell.PaddingBottom = 2f;
    cell.PaddingTop = 0f;
    return cell;
}
private DataTable GetDataTable()
{
    DataTable dt = new DataTable();
    dt.Columns.AddRange(new DataColumn[3] { new DataColumn("Id", typeof(int)),
                        new DataColumn("Name", typeof(string)),
                        new DataColumn("Country",typeof(string)) });
    dt.Rows.Add(1, "John Hammond", "United States");
    dt.Rows.Add(2, "Mudassar Khan", "India");
    dt.Rows.Add(3, "Suzanne Mathews", "France");
    dt.Rows.Add(4, "Robert Schidner", "Russia");
    return dt;
}

Screenshot

Before Adding DataTable

After Adding DataTable