大家帮我读读这段程序啊，如何将html转为pdf的时候分页？(提供html转pdf的好办法啊大家来看看~）

sanri_006 2010-10-22 02:01:20

下面这段程序是如果html页面超过1页的时候就直接切断了，只显示第1页的pdf，有什么办法在超过1页显示时，能将页面转成多页pdf？

将HTML保存为图片：需要用到webbrower类，将指定的HTML载入webbrower，然后调用其DrawToBitmap方法获取图片。完整代码如下：
using System;
using System.Data;
using System.Web;
using iTextSharp.text.pdf;
using iTextSharp.text;
using System.IO;
using System.Windows.Forms;
using System.Threading;
public partial class HTML2PDF : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

}
protected void Button1_Click(object sender, EventArgs e)
{
CreatPdf();
}
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, 9, 18, 36, 36);//左右上下
MemoryStream ms = new MemoryStream();
try
{
PdfWriter writer = PdfWriter.GetInstance(doc, ms);
writer.CloseStream = false;
doc.Open();
url = Server.MapPath("s.html");
Thread thread = new Thread(new ThreadStart(setBitmap));
thread.SetApartmentState(ApartmentState.STA);
thread.Start();
while (thread.IsAlive)
Thread.Sleep(100);
bitmap.Save(Server.MapPath("t.bmp"));

iTextSharp.text.Image img = iTextSharp.text.Image.GetInstance(bitmap, System.Drawing.Imaging.ImageFormat.Bmp);
img.ScalePercent(75);//560 630
doc.Add(img);
}
catch (Exception err)
{
throw new Exception(err.Message);
}
finally
{
doc.Close();
using (FileStream fs = new FileStream(Server.MapPath("out.pdf"), FileMode.Create))
{
ms.Position = 0;
byte[] bit = new byte[ms.Length];
ms.Read(bit, 0, (int)ms.Length);
fs.Write(bit, 0, bit.Length);
}
ViewPdf(ms);
}
}

private void ViewPdf(Stream fs)
{
Response.Clear();
//中文名的话
//Response.AppendHeader("Content-Disposition", "attachment;filename=" +
// HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8) + ";charset=GB2312");
Response.AddHeader("Content-Disposition", "attachment;FileName=out.pdf");
Response.AddHeader("Content-Length", fs.Length.ToString());
Response.ContentType = "application/pdf";
long fileLength = fs.Length;
int size = 10240;//10K一--分块下载，10K为1块
byte[] readData = new byte[size];
if (size > fileLength)
size = Convert.ToInt32(fileLength);
long fPos = 0;
bool isEnd = false;
while (!isEnd)
{
if ((fPos + size) >= fileLength)
{
size = Convert.ToInt32(fileLength - fPos);
isEnd = true;
}
readData = new byte[size];
fs.Position = fPos;
fs.Read(readData, 0, size);
Response.BinaryWrite(readData);
Response.OutputStream.Flush();
fPos += size;
}
fs.Close();
Response.OutputStream.Close();
Response.End();//非常重要，没有这句的话，页面的HTML代码将会保存到文件中
Response.Close();
}
}

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