一、实现方法

//WebSiteThumbnail.cs文件，在BS项目中需要添加对System.Windows.Forms的引用

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;

namespace TestWebApp

{

public class

WebSiteThumbnail

{

Bitmap m_Bitmap;

string m_Url;

int m_BrowserWidth, m_BrowserHeight,

m_ThumbnailWidth, m_ThumbnailHeight;

public WebSiteThumbnail(string Url,

int BrowserWidth, int BrowserHeight, int ThumbnailWidth, int

ThumbnailHeight)

{

m_Url =

Url;

m_BrowserHeight = BrowserHeight;

m_BrowserWidth = BrowserWidth;

m_ThumbnailWidth = ThumbnailWidth;

m_ThumbnailHeight = ThumbnailHeight;

}

public static Bitmap

GetWebSiteThumbnail(string Url, int BrowserWidth, int BrowserHeight, int

ThumbnailWidth, int ThumbnailHeight)

{

WebSiteThumbnail thumbnailGenerator = new WebSiteThumbnail(Url, BrowserWidth,

BrowserHeight, ThumbnailWidth, ThumbnailHeight);

return

thumbnailGenerator.GenerateWebSiteThumbnailImage();

}

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.Navigate(m_Url);

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.ClientSize = new Size(this.m_BrowserWidth,

this.m_BrowserHeight);

m_WebBrowser.ScrollBarsEnabled = false;

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_ThumbnailWidth, m_ThumbnailHeight, null,

IntPtr.Zero);

}

}

}

二、调用方法

//在任意网页中的Page_Load事件时，加入如下代码：

protected void Page_Load(object

sender, EventArgs e)

{

Bitmap

m_Bitmap = WebSiteThumbnail.GetWebSiteThumbnail("http://www.google.cn", 600, 600, 600, 600);

MemoryStream

ms = new MemoryStream();

m_Bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Png);//JPG、GIF、PNG等均可

byte[] buff =

ms.ToArray();

Response.BinaryWrite(buff);

}