How Do I 2 gridview to export pdf ? (ASP.NET C#)

protected void btnPDF_Click(object sender, EventArgs e)
        {
            int columnsCount = GridView1.HeaderRow.Cells.Count;
            PdfPTable pdfTable = new PdfPTable(columnsCount);
            foreach (TableCell gridViewHeaderCell in GridView1.HeaderRow.Cells)
            {
                Font font = new Font();
                font.Color = new BaseColor(GridView1.HeaderStyle.ForeColor);
                PdfPCell pdfCell = new PdfPCell(new Phrase(gridViewHeaderCell.Text, font));
                pdfCell.BackgroundColor = new BaseColor(GridView1.HeaderStyle.BackColor);
                pdfTable.AddCell(pdfCell);
            }
            foreach (GridViewRow gridViewRow in GridView1.Rows)
            {
                if (gridViewRow.RowType == DataControlRowType.DataRow)
                {
                    foreach (TableCell gridViewCell in gridViewRow.Cells)
                    {
                        Font font = new Font();
                        font.Color = new BaseColor(GridView1.RowStyle.ForeColor);
                        PdfPCell pdfCell = new PdfPCell(new Phrase(gridViewCell.Text, font));
                        pdfCell.BackgroundColor = new BaseColor(GridView1.RowStyle.BackColor);
                        pdfTable.AddCell(pdfCell);
                    }
                }
            }

            Document pdfDocument = new Document(PageSize.A4, 5f, 10f, 15f, 12f);
            PdfWriter.GetInstance(pdfDocument, Response.OutputStream);
            pdfDocument.Open();
            pdfDocument.Add(pdfTable);
            pdfDocument.Close();
            Response.ContentType = "application/pdf";
            Response.AppendHeader("content-disposition", "attachment;filename=Rapor.pdf");
            Response.Write(pdfDocument);
            Response.Flush();
            Response.End();
        }

This my code . Yeah it is working but it have some design problem and not for 2 grid only for one grid.

Actually ı need 2 gridview in one pdf report and it must dont have desıgn problem. 

Thank for helping and sorry for my bad english.

Screenshot is here;