在web项目中使用WebBrowser类-----给网站抓图
最近做一个WEB项目，其中要求有个功能就是程序能网页抓图，举个例子：
在test.aspx页面上放一个TextBox和一个Button，TextBox用来输入要抓取的网页地址，然后按了Button之后，服务器要对前面输入的网址进行抓图，然后显示出来。我把抓图的业务逻辑做成一个类：
using System;using System.Data;using System.Windows.Forms;using System.Drawing;/// <summary>/// WebSnap ：网页抓图对象/// </summary>public class WebSnap2{ public WebSnap2() { // // TODO: 在此处添加构造函数逻辑 // } /// <summary> /// 开始一个抓图并返回图象 /// </summary> /// <param name="Url">要抓取的网页地址</param> /// <returns></returns> public Bitmap StartSnap(string Url) { WebBrowser myWB = this.GetPage(Url); Bitmap returnValue = this.SnapWeb(myWB); myWB.Dispose(); return returnValue; } private WebBrowser GetPage(string Url) { WebBrowser myWB = new WebBrowser(); myWB.ScrollBarsEnabled = false; myWB.Navigate(Url); while (myWB.ReadyState != WebBrowserReadyState.Complete) { System.Windows.Forms.Application.DoEvents(); } return myWB; } private Bitmap SnapWeb(WebBrowser wb) { HtmlDocument hd = wb.Document; int height = Convert.ToInt32(hd.Body.GetAttribute("scrollHeight")) + 10; int width = Convert.ToInt32(hd.Body.GetAttribute("scrollWidth")) + 10; wb.Height = height; wb.Width = width; Bitmap bmp = new Bitmap(width, height); Rectangle rec = new Rectangle(); rec.Width = width; rec.Height = height; wb.DrawToBitmap(bmp, rec); return bmp; }}WebSnap ws = new WebSnap(); Bitmap bmp= ws.StartSnap(TextBox1.Text); System.IO.MemoryStream ms = new System.IO.MemoryStream(); bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg); Response.BinaryWrite(ms.GetBuffer());