iTextSharpのメモ

var document = new Document(PageSize.A3.Rotate());

// 外枠のテーブルを用意
var outerTable = new PdfPTable(2);
outerTable.WidthPercentage = 100;
outerTable.SpacingAfter = 14f;
// カラムは3:1の比率で
outerTable.SetWidths(new float[] { 3f, 1f });
// 外枠のテーブルの枠線を消す
outerTable.DefaultCell.Border = 0;

// 左のセルに入れる要素を準備（今回はテーブル）
var innerLeftTable = new PdfPTable(3);
innerLeftTable.WidthPercentage = 100;
innerLeftTable.AddCell(new PdfPHeaderCell { Phrase = new Phrase("Header 1", FONT_Default), BackgroundColor = BaseColor.LIGHT_GRAY });
innerLeftTable.AddCell(new PdfPHeaderCell { Phrase = new Phrase("Header 2", FONT_Default), BackgroundColor = BaseColor.LIGHT_GRAY });
innerLeftTable.AddCell(new PdfPHeaderCell { Phrase = new Phrase("Header 3", FONT_Default), BackgroundColor = BaseColor.LIGHT_GRAY });
innerLeftTable.AddCell(new PdfPCell(new Phrase("Content 1", FONT_Default)));
innerLeftTable.AddCell(new PdfPCell(new Phrase("Content 2", FONT_Default)));
innerLeftTable.AddCell(new PdfPCell(new Phrase("Content 2", FONT_Default)));
outerTable.AddCell(innerLeftTable);

// 右のセルに入れる要素を準備（今回はこちらもテーブル）
var innerRightTable = new PdfPTable(1);
innerRightTable.WidthPercentage = 100;
innerRightTable.AddCell(new PdfPHeaderCell { Phrase = new Phrase("Header 4", FONT_Default), BackgroundColor = BaseColor.LIGHT_GRAY });
innerRightTable.AddCell(new PdfPCell(new Phrase("Content 2", FONT_Default)));
outerTable.AddCell(innerRightTable);

document.Add(outerTable);

iTextSharp.text.Font FONT_Default = FontFactory.GetFont("MS Gothic", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);

var table = new PdfPTable(1);
table.AddCell(
    new PdfPCell(
        new Phrase("", FONT_Default)
    ) { MinimumHeight = 1f }
);

var cell = new PdfPCell(new Phrase("Content 1", FONT_Default));
cell.Colspan = 2;

private static readonly iTextSharp.text.Font FONT_Title_White = FontFactory.GetFont("MS Gothic", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED, 20f, (int)FontStyle.Bold, BaseColor.WHITE);

var table = new PdfPTable(1);
table.WidthPercentage = 100;
table.SpacingAfter = 14f;
table.AddCell(new PdfPCell(new Phrase("PDF Title", FONT_Title_White))
{
    BackgroundColor = BaseColor.BLACK,
    Padding = 10f,
    // 多分ベースラインからPaddingBottomを取っているので、はみ出る分大きめにとる
    PaddingBottom = 14f,
});

// using iTextSharp.text;
// using iTextSharp.text.pdf;
// using iTextSharp.text.pdf.draw;

var data = new List<string>() { "A", "B", "C", "D" };

var table = new PdfPTable(1);
var cell = new PdfPCell();
foreach (var d in data)
{
    cell.AddElement(new Paragraph(d, FONT_Default));
    var line = new LineSeparator();
    line.Offset = -2;
    cell.AddElement(line);
}
table.AddCell(cell);
document.Add(table);

var canvas = writer.DirectContent;
for (float x = 0; x < pagesize.Width;)
{
    for (float y = 0; y < pagesize.Height;)
    {
        //canvas.circle(x, y, 1f);
        canvas.Circle(x, y, 1f);
        y += 72f;
    }
    x += 72f;
}
canvas.Fill();

var table = new PdfPTable(3);
table.AddCell(GeneratePdfPCell("1"));
var cell = GeneratePdfPCell("2");
cell.Rowspan = 3;
table.AddCell(cell);
table.AddCell(GeneratePdfPCell("3"));
table.AddCell(GeneratePdfPCell("4"));
table.AddCell(GeneratePdfPCell("5"));
table.AddCell(GeneratePdfPCell("6"));
table.AddCell(GeneratePdfPCell("7"));
table.AddCell(GeneratePdfPCell("8"));
table.AddCell(GeneratePdfPCell("9"));
table.AddCell(GeneratePdfPCell("10"));

// ------------------------------
public static PdfPCell GeneratePdfPCell(string content)
{
    return new PdfPCell(new Phrase(content, FONT_Default))
    {
        MinimumHeight = 14f,
    };
}