在網(wǎng)頁中根據(jù)url截圖并輸出到網(wǎng)頁中

 1 using System;
 2  using System.Collections.Generic;
 3  using System.Linq;
 4  using System.Web;
 5  using System.Web.UI;
 6  using System.Web.UI.WebControls;
 7  using System.Threading;
 8  using System.Windows.Forms;
 9 using System.Drawing;
10 using System.IO;
11 
12 /// <summary>
13 /// This page show the way of generate a image in website
14 /// </summary>
15 public partial class Default2 : System.Web.UI.Page
16 {
17     protected void Page_Load(object sender, EventArgs e)
18     {
19         Bitmap m_Bitmap = WebSiteThumbnail.GetWebSiteThumbnail("http://www.google.cn", 600, 600, 600, 600);
20         MemoryStream ms = new MemoryStream();
21         m_Bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Png);//JPG、GIF、PNG等均可   
22         byte[] buff = ms.ToArray();
23         Response.BinaryWrite(buff);
24     }
25 }
26 
27 public class WebSiteThumbnail
28 {
29     Bitmap m_Bitmap;
30     string m_Url;
31     int m_BrowserWidth, m_BrowserHeight, m_ThumbnailWidth, m_ThumbnailHeight;
32     public WebSiteThumbnail(string Url, int BrowserWidth, int BrowserHeight, int ThumbnailWidth, int ThumbnailHeight)
33     {
34         m_Url = Url;
35         m_BrowserHeight = BrowserHeight;
36         m_BrowserWidth = BrowserWidth;
37         m_ThumbnailWidth = ThumbnailWidth;
38         m_ThumbnailHeight = ThumbnailHeight;
39     }
40     public static Bitmap GetWebSiteThumbnail(string Url, int BrowserWidth, int BrowserHeight, int ThumbnailWidth, int ThumbnailHeight)
41     {
42         WebSiteThumbnail thumbnailGenerator = new WebSiteThumbnail(Url, BrowserWidth, BrowserHeight, ThumbnailWidth, ThumbnailHeight);
43         return thumbnailGenerator.GenerateWebSiteThumbnailImage();
44     }
45     public Bitmap GenerateWebSiteThumbnailImage()
46     {
47         Thread m_thread = new Thread(new ThreadStart(_GenerateWebSiteThumbnailImage));
48         m_thread.SetApartmentState(ApartmentState.STA);
49         m_thread.Start();
50         m_thread.Join();
51         return m_Bitmap;
52     }
53     private void _GenerateWebSiteThumbnailImage()
54     {
55         WebBrowser m_WebBrowser = new WebBrowser();
56         m_WebBrowser.ScrollBarsEnabled = false;
57         m_WebBrowser.Navigate(m_Url);
58         m_WebBrowser.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(WebBrowser_DocumentCompleted);
59         while(m_WebBrowser.ReadyState != WebBrowserReadyState.Complete)
60             Application.DoEvents();
61         m_WebBrowser.Dispose();
62     }
63     private void WebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
64     {
65         WebBrowser m_WebBrowser = (WebBrowser)sender;
66         m_WebBrowser.ClientSize = new Size(this.m_BrowserWidth, this.m_BrowserHeight);
67         m_WebBrowser.ScrollBarsEnabled = false;
68         m_Bitmap = new Bitmap(m_WebBrowser.Bounds.Width, m_WebBrowser.Bounds.Height);
69         m_WebBrowser.BringToFront();
70         m_WebBrowser.DrawToBitmap(m_Bitmap, m_WebBrowser.Bounds);
71         m_Bitmap = (Bitmap)m_Bitmap.GetThumbnailImage(m_ThumbnailWidth, m_ThumbnailHeight, null, IntPtr.Zero);
72     }
73 }
74 
75