c#实现在网页中根据url截图并输出到网页的方法（c#实现在网页中根据url截图并输出到网页的方法）

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。

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071 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);}}