WebSnapshotsHelper(HTML转换为图片)

 1 /// <summary>
 2     /// WebBrowser Url生成图片
 3     /// HTML转图片
 4     /// </summary>
 5     public class WebSnapshotsHelper
 6     {
 7         Bitmap m_Bitmap;
 8         string m_Url;
 9         int m_BrowserWidth, m_BrowserHeight, m_ThumbnailWidth, m_ThumbnailHeight;
10         public WebSnapshotsHelper(string Url, int BrowserWidth, int BrowserHeight, int ThumbnailWidth, int ThumbnailHeight)
11         {
12             m_Url = Url;
13             m_BrowserHeight = BrowserHeight;
14             m_BrowserWidth = BrowserWidth;
15             m_ThumbnailWidth = ThumbnailWidth;
16             m_ThumbnailHeight = ThumbnailHeight;
17         }
18         public static Bitmap GetWebSiteThumbnail(string Url, int BrowserWidth, int BrowserHeight, int ThumbnailWidth, int ThumbnailHeight)
19         {
20             WebSnapshotsHelper thumbnailGenerator = new WebSnapshotsHelper(Url, BrowserWidth, BrowserHeight, ThumbnailWidth, ThumbnailHeight);
21             return thumbnailGenerator.GenerateWebSiteThumbnailImage();
22         }
23         public Bitmap GenerateWebSiteThumbnailImage()
24         {
25             Thread m_thread = new Thread(new ThreadStart(_GenerateWebSiteThumbnailImage));
26             m_thread.SetApartmentState(ApartmentState.STA);
27             m_thread.Start();
28             m_thread.Join();
29             return m_Bitmap;
30         }
31         private void _GenerateWebSiteThumbnailImage()
32         {
33             WebBrowser m_WebBrowser = new WebBrowser();
34             m_WebBrowser.ScrollBarsEnabled = false;
35             m_WebBrowser.Navigate(m_Url);
36             m_WebBrowser.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(WebBrowser_DocumentCompleted);
37             while (m_WebBrowser.ReadyState != WebBrowserReadyState.Complete)
38             {
39                 Application.DoEvents();
40             }
41             m_WebBrowser.Dispose();
42         }
43         private void WebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
44         {
45             WebBrowser m_WebBrowser = (WebBrowser)sender;
46             m_WebBrowser.ClientSize = new Size(this.m_BrowserWidth, this.m_BrowserHeight);
47             m_WebBrowser.ScrollBarsEnabled = false;
48             m_Bitmap = new Bitmap(m_WebBrowser.Bounds.Width, m_WebBrowser.Bounds.Height);
49             m_WebBrowser.BringToFront();
50             m_WebBrowser.DrawToBitmap(m_Bitmap, m_WebBrowser.Bounds);
51             m_Bitmap = (Bitmap)m_Bitmap.GetThumbnailImage(m_ThumbnailWidth, m_ThumbnailHeight, null, IntPtr.Zero);
52         }
53 
54     }