Multiple gridviews to single pdf using iTextsharp

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C#

PDF

export

itextsharp

Hi All,

I am trying to export multiple gridviews into single pdf using iTextSharp. I am looping through the gridviews and then looping through the rows of the gridview. The looping is going ok. But after pdf download, only the last gridview can be seen. It seems the gridviews are overwriting each other and only last one remains. Here is my code. What am I doing wrong?

protected void btnExportToPDF_Click(object sender, EventArgs e)
        {
            GridView[] gvExcel = new GridView[] { gridvw1,gridvw2,gridvw3 };
            Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 10f, 10f);
            

            for (int i = 0; i < gvExcel.Length; i++)
            {
                if (gvExcel[i].Visible)
                {

                    PdfPTable pdfTbl = new PdfPTable(gvExcel[i].HeaderRow.Cells.Count);

                    foreach (TableCell headerTblCell in gvExcel[i].HeaderRow.Cells)
                    {
                        Font font = new Font();
                        font.Color = new BaseColor(gvExcel[i].HeaderStyle.ForeColor);
                        PdfPCell pdfCell = new PdfPCell(new Phrase(headerTblCell.Text));
                        pdfCell.BackgroundColor = new BaseColor(gvExcel[i].HeaderStyle.ForeColor);
                        pdfTbl.AddCell(pdfCell);
                    }


                    foreach (GridViewRow gvRow in gvExcel[i].Rows)
                    {
                        foreach (TableCell tblCell in gvRow.Cells)
                        {
                            Font font = new Font();
                            font.Color = new BaseColor(gvExcel[i].RowStyle.ForeColor);
                            PdfPCell pdfCell = new PdfPCell(new Phrase(tblCell.Text));
                            pdfCell.BackgroundColor = new BaseColor(gvExcel[i].RowStyle.ForeColor);
                            pdfTbl.AddCell(pdfCell);
                        }
                    }

                    //Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 10f, 10f);
                    PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
                    pdfDoc.Open();
                    pdfDoc.Add(pdfTbl);
                }
            }

            pdfDoc.Close();

            //Response.Clear();
            Response.ContentType = "application/pdf";
            Response.AppendHeader("content-disposition", "attachment;filename=report_" + startDate + "-" + endDate + ".pdf");
            Response.Write(pdfDoc);
            Response.Flush();
            Response.End();
        }

What I have tried:

I am sure there is somewhere the gridviews are getting overlapped. But I am not able to find where.