本文实例讲述了C#实现在网页中根据url截图并输出到网页的方法。分享给大家供大家参考,具体如下:
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。
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 | using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Threading; using System.Windows.Forms; using System.Drawing; using System.IO; /// <summary> /// This page show the way of generate a image in website /// </summary> public partial class Default2 : System.Web.UI.Page { 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); } } 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); } } |
希望本文所述对大家C#程序设计有所帮助。