using System.Drawing;  using System.Drawing.Imaging;  using System.IO;  using System.Threading;  using System.Windows.Forms;    public class WebsiteToImage  {      private Bitmap m_Bitmap;      private string m_Url;      private string m_FileName = string.Empty;        public WebsiteToImage(string url)      {          // Without file           m_Url = url;      }        public WebsiteToImage(string url, string fileName)      {          // With file           m_Url = url;          m_FileName = fileName;      }        public Bitmap Generate()      {          // Thread           var m_thread = new Thread(_Generate);          m_thread.SetApartmentState(ApartmentState.STA);          m_thread.Start();          m_thread.Join();          return m_Bitmap;      }        private void _Generate()      {          var browser = new WebBrowser { ScrollBarsEnabled = false };          browser.Navigate(m_Url);          browser.DocumentCompleted += WebBrowser_DocumentCompleted;            while (browser.ReadyState != WebBrowserReadyState.Complete)          {              Application.DoEvents();          }            browser.Dispose();      }        private void WebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)      {          // Capture           var browser = (WebBrowser)sender;          browser.ClientSize = new Size(browser.Document.Body.ScrollRectangle.Width, browser.Document.Body.ScrollRectangle.Bottom);          browser.ScrollBarsEnabled = false;          m_Bitmap = new Bitmap(browser.Document.Body.ScrollRectangle.Width, browser.Document.Body.ScrollRectangle.Bottom);          browser.BringToFront();          browser.DrawToBitmap(m_Bitmap, browser.Bounds);            // Save as file?           if (m_FileName.Length > 0)          {              // Save               m_Bitmap.SaveJPG100(m_FileName);          }      }  }    public static class BitmapExtensions  {      public static void SaveJPG100(this Bitmap bmp, string filename)      {          var encoderParameters = new EncoderParameters(1);          encoderParameters.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, 100L);          bmp.Save(filename, GetEncoder(ImageFormat.Jpeg), encoderParameters);      }        public static void SaveJPG100(this Bitmap bmp, Stream stream)      {          var encoderParameters = new EncoderParameters(1);          encoderParameters.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, 100L);          bmp.Save(stream, GetEncoder(ImageFormat.Jpeg), encoderParameters);      }        public static ImageCodecInfo GetEncoder(ImageFormat format)      {          var codecs = ImageCodecInfo.GetImageDecoders();            foreach (var codec in codecs)          {              if (codec.FormatID == format.Guid)              {                  return codec;              }          }            // Return           return null;      }  }

调用方式如下：

WebsiteToImage websiteToImage = new WebsiteToImage( "http://www.cnn.com", @"C:\Some Folder\Test.jpg");  websiteToImage.Generate();

这种方式使用了WebBrowser控件，所以必须引用 System.Windows.Forms 命名空间。