WebSiteThumbnail 直接根据html生成图片

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Drawing;
using System.Threading;
using System.Windows.Forms;
using System.Text;

namespace WebApplication3
{
    public class WebSiteThumbnail
    {
        Bitmap m_Bitmap;
        string m_Url;
        string m_html = string.Empty;

        public WebSiteThumbnail(string Url, string Html)
        {
            m_Url = Url;
            m_html = Html;
        }

        ///
        /// 生成缩略图
        ///
        /// 源码
        ///
        public static Bitmap GetWebSiteThumbnail(string Html)
        {
            WebSiteThumbnail thumbnailGenerator = new WebSiteThumbnail("", Html);
        ReTest:
            Bitmap m_Bitmap = thumbnailGenerator.GenerateWebSiteThumbnailImage();
            if (m_Bitmap == null)
            {
                goto ReTest;
            }
            return m_Bitmap;
        }

        public Bitmap GenerateWebSiteThumbnailImage()
        {
            Thread m_thread = new Thread(new ThreadStart(_GenerateWebSiteThumbnailImage));
            m_thread.SetApartmentState(ApartmentState.STA);
            m_thread.Start();
            m_thread.Join();
            return m_Bitmap;
        }
        private void _GenerateWebSiteThumbnailImage()
        {
            WebBrowser m_WebBrowser = new WebBrowser();
            m_WebBrowser.ScrollBarsEnabled = false;
            m_WebBrowser.DocumentText = m_html;
            m_WebBrowser.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(WebBrowser_DocumentCompleted);
            while (m_WebBrowser.ReadyState != WebBrowserReadyState.Complete)
                Application.DoEvents();
            m_WebBrowser.Dispose();
        }
        private void WebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {
            WebBrowser m_WebBrowser = (WebBrowser)sender;
            m_WebBrowser.ScrollBarsEnabled = false;
            m_WebBrowser.Width = m_WebBrowser.Document.Body.ScrollRectangle.Width; ;
            m_WebBrowser.Height = m_WebBrowser.Document.Body.ScrollRectangle.Height;
            m_Bitmap = new Bitmap(m_WebBrowser.Bounds.Width, m_WebBrowser.Bounds.Height);
            m_WebBrowser.BringToFront();
            m_WebBrowser.DrawToBitmap(m_Bitmap, m_WebBrowser.Bounds);
            m_Bitmap = (Bitmap)m_Bitmap.GetThumbnailImage(m_WebBrowser.Bounds.Width, m_WebBrowser.Bounds.Height, null, IntPtr.Zero);
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Drawing;
using System.IO;
using System.Text;

namespace WebApplication3
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            StringBuilder sbContent = new StringBuilder();

            sbContent.Append("<table border="1" width="400">");
            sbContent.Append("<tr>");
            sbContent.Append("<td>");
            sbContent.Append("标题2");
            sbContent.Append("</td>");
            sbContent.Append("</tr>");
            sbContent.Append("<tr>");
            sbContent.Append("<td >");
            sbContent.Append("【环球时报综合报道】");
            sbContent.Append("</td>");
            sbContent.Append("</tr>");
            sbContent.Append("<tr>");
            sbContent.Append("<td>");
            sbContent.Append("时间" + DateTime.Now.ToString());
            sbContent.Append("</td>");
            sbContent.Append("</tr>");
            sbContent.Append("</table>");

 

            Bitmap m_Bitmap = WebSiteThumbnail.GetWebSiteThumbnail(sbContent.ToString());
            if (m_Bitmap != null)
            {
                MemoryStream ms = new MemoryStream();
                m_Bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
                byte[] buff = ms.ToArray();
                ms.Dispose();
                ms.Close();
                m_Bitmap.Dispose();

                Response.ContentType = "image/jpg";
                Response.BinaryWrite(buff);
                Response.End();
            }
        }
    }
}

from:http://blog.sina.com.cn/s/blog_42bea1a80101ay22.html