C# HTML转PDF 页面内容太大怎么分页？
public void writeLog(string sMessage)
        {
            //FileStream fs = new FileStream(Server.MapPath("pagetohtml.htm"), FileMode.Append);
            try
            {
                StreamWriter swriter = File.CreateText(Server.MapPath("pagetohtml.htm"));
                swriter.WriteLine(sMessage);
                swriter.Close();
            }
            catch
            { }
        }

        private System.Drawing.Bitmap bitmap;
        private string url;
        private int w = 760, h = 900;

        public void setBitmap()
        {
            using (WebBrowser wb = new WebBrowser())
            {
                wb.Width = w;
                wb.Height = h;
                wb.ScrollBarsEnabled = false;
                wb.Navigate(url);
                //确保页面被解析完全
                while (wb.ReadyState != WebBrowserReadyState.Complete)
                {
                    System.Windows.Forms.Application.DoEvents();
                }
                bitmap = new System.Drawing.Bitmap(w, h);
                wb.DrawToBitmap(bitmap, new System.Drawing.Rectangle(0, 0, w, h));
                wb.Dispose();
            }
        }

        private void CreatPdf()
        {
            Document doc = new Document(PageSize.A4