How do I display specific datagridview columns in iTextSharp

iTextSharp.text.Font fontTable = FontFactory.GetFont("Arial", 8, iTextSharp.text.Font.NORMAL, BaseColor.BLACK);

        PdfPTable table = new PdfPTable(dataGridView1.Columns.Count);
        table.SpacingBefore = 45f;
        table.TotalWidth = 300;
        table.DefaultCell.Phrase = new Phrase() { Font = fontTable };

        for (int j = 0; j < dataGridView1.Columns.Count; j++)
        {
            table.AddCell(new Phrase(dataGridView1.Columns[j].HeaderText, fontTable));

        }

        table.HeaderRows = 1;

        for (int i = 0; i < dataGridView1.Rows.Count; i++)
        {
            for (int k = 0; k < dataGridView1.Columns.Count; k++)
            {
                if (dataGridView1[k, i].Value != null)
                {
                    table.AddCell(new Phrase(dataGridView1[k, i].Value.ToString(),fontTable));
                }
            }
        }



        doc.Add(table);

foreach (DataGridViewColumn c in GridView.Columns)
{
    if( c.Name == "Something" )
    {
        //Skip this column
        continue;
    }

    //process these columns
    //..
}

for (int i = 0; i < GridView.Rows.Count - 1; i++)
{
    for (int j = 0; j < GridView.Columns.Count - 1; j++)
    {
        if( GridView.Columns[j].Name == "Something" )
        {
            //Skip this column
            continue
        }

        //Process these columns
    }
}