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。
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。
dy("nrwz");
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