基于Asp.net C#实现HTML转图片（网页快照）

调用方法：

//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);         }     } }

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);        }

 

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