如何使用itextsharp在不同页面上编写和拆分数据表

首先，这是我的代码：

                    string pdfTemplate = Application.StartupPath + "''Templates''Template Medico.pdf";
                    string newFile = Application.StartupPath + "''Relatórios''Relatório Médico_" + dataArquivo + ".pdf";
                    PdfReader pdfReader = new PdfReader(pdfTemplate);
                    PdfStamper pdfStamper = new PdfStamper(pdfReader, new FileStream(newFile, FileMode.Create));
                    AcroFields pdfFormFields = pdfStamper.AcroFields;
                    // Form Filling
                    pdfFormFields.SetField("data", data);
                    pdfFormFields.SetField("medico_nome", campo);
                    pdfFormFields.SetField("numero_consultas", numeroConsultas);
                    // Table Building
                    int numColumns = ds.Tables[0].Columns.Count;
                    PdfPTable datatable = new PdfPTable(numColumns);
                    datatable.DefaultCell.Padding = 10;
                    datatable.WidthPercentage = 100; 
                    datatable.DefaultCell.HorizontalAlignment = Element.ALIGN_LEFT;
                    float[] columnWidths = { 80, 80, 80, 80, 80, 80, 80, 80, 80 };
                    datatable.SetWidths(columnWidths);
                    float[] totalWidth = { 80, 80, 80, 80, 80, 80, 80, 80, 80 };
                    datatable.SetTotalWidth(totalWidth);
                    // Table Header
                    for (int k = 0; k < ds.Tables[0].Columns.Count; k++)
                    {
                        Phrase collumname = new Phrase(ds.Tables[0].Columns[k].ColumnName, FontFactory.GetFont("Verdana", 9));
                        datatable.AddCell(collumname);
                    }
                    // Lines and Columns
                    if (ds.Tables[0].Rows.Count <= 9) // less than 9 rows = no problem, no new pages and table spliting needed
                    {
                        for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
                        {
                            for (int j = 0; j < ds.Tables[0].Columns.Count; j++)
                            {
                                datatable.DefaultCell.BackgroundColor = iTextSharp.text.BaseColor.WHITE;
                                datatable.DefaultCell.HorizontalAlignment = iTextSharp.text.Element.ALIGN_LEFT;
                                Phrase phrase = new Phrase(ds.Tables[0].Rows[i][j].ToString(), FontFactory.GetFont("Verdana", 9));
                                datatable.AddCell(phrase);
                            }
                        }
                        // Write down the table on page 2
                        PdfContentByte content = pdfStamper.GetUnderContent(2);
                        datatable.WriteSelectedRows(0, -1, 70.0f, 495.0f, content);
                    }
                    else
                    {
                        int newPage = 3;
                        int currentPage = 2;
                        for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
                        {
                            for (int j = 0; j < ds.Tables[0].Columns.Count; j++)
                            {
                                datatable.DefaultCell.BackgroundColor = iTextSharp.text.BaseColor.WHITE;
                                datatable.DefaultCell.HorizontalAlignment = iTextSharp.text.Element.ALIGN_LEFT;
                                Phrase phrase = new Phrase(ds.Tables[0].Rows[i][j].ToString(), FontFactory.GetFont("Verdana", 9));
                                datatable.AddCell(phrase);
                            }
                            if (i > 0 && i % 9 == 0)
                            {   //How do i print the table ONLY every 9 iterations? (9 iterations = 9 rows)
                                PdfContentByte content = pdfStamper.GetUnderContent(currentPage);
                                // Or how do i make a loop using the rowStart and rowEnd arguments of the
                                // WriteSelectedRows function in order to write only a set of 9 rows for each page?
                                datatable.WriteSelectedRows(0, -1, 70.0f, 495.0f, content);
                                pdfStamper.InsertPage(newPage, pdfReader.GetPageSize(2));
                                newPage++;
                                currentPage++;
                            }
                        }
                    }

代码对我目前遇到的主要问题进行了很好的注释，但正如线程标题中所述，真正更大的问题是以某种方式"拆分"或"控制"行和列的循环/迭代以匹配页面，跳转到另一个页面，并继续编写表格。

任何帮助都将不胜感激。

                else
                {
                    int newPageNumber = 3;
                    int currentPage = 2;
                    int lastLinePrinted = 0;
                    int maxLine = 9;
                    bool lastPage = false;
                    for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
                    {
                        for (int j = 0; j < ds.Tables[0].Columns.Count; j++)
                        {
                            datatable.DefaultCell.BackgroundColor = iTextSharp.text.BaseColor.WHITE;
                            datatable.DefaultCell.HorizontalAlignment = iTextSharp.text.Element.ALIGN_LEFT;
                            Phrase phrase = new Phrase(ds.Tables[0].Rows[i][j].ToString(), FontFactory.GetFont("Verdana", 9));
                            datatable.AddCell(phrase);
                        }
                        // must decrement the ds.Tables[0].Rows.Count here, 
                        // otherwise it'll never enter the code below, we'll
                        // increment it back when we reach the last page
                        if ((i > 0 && i % 9 == 0) || i == ds.Tables[0].Rows.Count - 1)
                        {
                            PdfContentByte content = pdfStamper.GetUnderContent(currentPage);
                            datatable.WriteSelectedRows(lastLinePrinted, maxLine, 70.0f, 495.0f, content);
                            if (!lastPage)
                            {
                                pdfStamper.InsertPage(newPage, pdfReader.GetPageSize(2));
                                newPage++;
                                currentPage++;
                                lastLinePrinted = maxLine;
                                maxLine += 9;
                            }
                            if (maxLine > ds.Tables[0].Rows.Count)
                            {
                                maxLine = ds.Tables[0].Rows.Count+1;
                                lastPage = true;
                            }
                        }
                    }
                }

int pageRows=0;    
while (pageRows<datatable.Rows.Count+8)
      {
         content.BeginText();
         table.WriteSelectedRows(pageRows, pageRows+9, 20, 550, cb);
         pageRows = pageRows + 9;
         content.EndText();
         document.NewPage();
       }