iTextSharp 创建无边框表格

 iTextSharp.text.Table TbHead = new iTextSharp.text.Table(12);

                TbHead.DefaultHorizontalAlignment = 1;
                TbHead.Widths = new float[12] { 1.5F, 1.5F, 3, 1, 1, 1, 1, 1.5F, 1.5F, 2, 4, 3 };//列宽度
                TbHead.Width = 100;//百分比宽度
                TbHead.Border = 0;
                TbHead.DefaultCellBorderWidth = 0;
                TbHead.DefaultCellBorder = 0;