using iTextSharp.text;
using iTextSharp.text.pdf;
using System.IO;

public void PDF(string html)
    {
        Document dom = new Document(); //创建文档
        PdfWriter.GetInstance(dom, new FileStream(Server.MapPath("test") + Guid.NewGuid() + ".pdf", FileMode.Create));//初始化写入流
        BaseFont bf = BaseFont.CreateFont(@"C:\Windows\Fonts\STZHONGS.TTF", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED) \\设置字体
        Font font = new Font(bf, 20);
        dom.Open(); //打开文档
        dom.Add(new Paragraph(html, font)) \\写入内容
        dom.Close();   //关闭文档
    }