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 != plete)
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("", 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);
}
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