avoid duplicate value datagridview to iTextSharp

Question

I do not want to see duplicate value in pdf report from datagridview, how?

 

foreach (DataRow r in dt.Rows)

{

if (dt.Rows.Count > 0)

{

pdfTable.AddCell(new Phrase(r[2].ToString(), fontTable2));

pdfTable.AddCell(new Phrase(r[3].ToString(), fontTable2));

pdfTable.AddCell(new Phrase(r[4].ToString(), fontTable2));

}

}