在web项目中施用WebBrowser类-给网站抓图

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());