本文實例講述了C#實現在網頁中根據url截圖并輸出到網頁的方法。分享給大家供大家參考，具體如下：
網頁截圖是很多站點的一個小需求，這段代碼實現的是如何根據url獲得網頁截圖并輸出到網頁中。
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); }} 希望本文所述對大家C#程序設計有所幫助。
