在网页中根据url截图并输出到网页中

 

 

网页截图是很多站点的一个小需求，这段代码实现的是如何根据url获得网页截图并输出到网页中。

代码

   
     

    
      
    
       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