引入包

用nuget安装itext和itext.bouncy-castle-adapter包：

创建pdf

string path = "a.pdf";
PdfWriter writer = new PdfWriter(path);
PdfDocument pdfDoc = new PdfDocument(writer);
var doc=new Document(pdfDoc);
Paragraph p = new Paragraph("hello,测试一下");
PdfFont font = PdfFontFactory.CreateFont(@"C:\Windows\Fonts\SIMKAI.TTF", PdfEncodings.IDENTITY_H);
p.SetFont(font);doc.Add(p);
doc.Close();

操作表格

string path = "a.pdf";
PdfWriter writer = new PdfWriter(path);
PdfDocument pdfDoc = new PdfDocument(writer);
var doc = new Document(pdfDoc);var headerTexts = new[] {"标识", "姓名"
};var table = new Table(headerTexts.Length)  // 设置表格列数.SetTextAlignment(iText.Layout.Properties.TextAlignment.CENTER);//设置字体
PdfFont font = PdfFontFactory.CreateFont(@"C:\Windows\Fonts\SIMKAI.TTF", PdfEncodings.IDENTITY_H);
table.SetFont(font);//添加表头
foreach (var header in headerTexts)
{table.AddHeaderCell(new Cell().Add(new Paragraph(header)).SetBold()//设置粗体);
}//第一行
table.AddCell(new Cell(0, 1).Add(new Paragraph("1"))//序号.SetVerticalAlignment(iText.Layout.Properties.VerticalAlignment.MIDDLE)).AddCell(new Cell(0, 1).Add(new Paragraph("abc，测试")).SetMinWidth(25)//姓名  设置最小列宽25,方便名字横向显示.SetVerticalAlignment(iText.Layout.Properties.VerticalAlignment.MIDDLE));//增加一行
table.StartNewRow();//第二行
table.AddCell(new Cell(0, 1).Add(new Paragraph("2"))//序号.SetVerticalAlignment(iText.Layout.Properties.VerticalAlignment.MIDDLE)).AddCell(new Cell(0, 1).Add(new Paragraph("abc，测试2")).SetMinWidth(25)//姓名  设置最小列宽25,方便名字横向显示.SetVerticalAlignment(iText.Layout.Properties.VerticalAlignment.MIDDLE));//增加到文档
doc.Add(table);//关闭文档
doc.Close();