对指定的网页进行截图的效果 C#版

碰到一个项目，需要对指定的网页进行截图保存，晕死！

需求永远都是怪异的.....
解决是关键～

遂写了以下代码，快准狠!（因为赶时间！）
可以实现对指定的页面获取，按指定的大小生成缩略图，当然也可以1：1的产生图，
页面上的javascript 运行对截图貌似没任何影响，相当的正常，我个人都觉得很神奇。 

首先对项目添加系统引用
system.drawing;
system.drawing.design;
system.windows.forms;

获取指定网页并转换成图片的类：

using system;
using system.collections.generic;
using system.text;
using system.drawing;
using system.drawing.drawing2d;
using system.drawing.imaging;
using system.windows.forms;
using system.diagnostics;

namespace mylib
{
    public class getimage
    {
        private int s_height;
        private int s_width;
        private int f_height;
        private int f_width;
        private string myurl;

        public int screenheight
        {
            get { return s_height; }
            set { s_height = value; }
        }

        public int screenwidth
        {
            get { return s_width; }
            set { s_width = value; }
        }

        public int imageheight
        {
            get { return f_height; }
            set { f_height = value; }
        }

        public int imagewidth
        {
            get { return f_width; }
            set { f_width = value; }
        }

        public string website
        {
            get { return myurl; }
            set { myurl = value; }
        }

        public getimage(string website, int screenwidth, int screenheight, int imagewidth, int imageheight)
        {
            this.website = website;
            this.screenwidth = screenwidth;
            this.screenheight = screenheight;
            this.imageheight = imageheight;
            this.imagewidth = imagewidth;
        }

        public bitmap getbitmap()
        {
            webpagebitmap shot = new webpagebitmap(this.website, this.screenwidth, this.screenheight);
            shot.getit();
            bitmap pic = shot.drawbitmap(this.imageheight, this.imagewidth);
            return pic;
        }
    }

    class webpagebitmap
    {
        webbrowser mybrowser;
        string url;
        int height;
        int width;

        public webpagebitmap(string url, int width, int height)
        {
            this.height = height;
            this.width = width;
            this.url = url;
            mybrowser = new webbrowser();
            mybrowser.scrollbarsenabled = false;
            mybrowser.size = new size(this.width, this.height);
        }

        public void getit()
        {
            mybrowser.navigate(this.url);
            while (mybrowser.readystate != webbrowserreadystate.complete)
            {
                application.doevents();
            }
        }

        public bitmap drawbitmap(int theight, int twidth)
        {
            bitmap mybitmap = new bitmap(width, height);
            rectangle drawrect = new rectangle(0, 0, width, height);
            mybrowser.drawtobitmap(mybitmap, drawrect);
            system.drawing.image imgoutput = mybitmap;
            system.drawing.image othumbnail = new bitmap(twidth, theight, imgoutput.pixelformat);
            graphics g = graphics.fromimage(othumbnail);
            g.compositingquality = compositingquality.highspeed;
            g.smoothingmode = smoothingmode.highspeed;
            g.interpolationmode = interpolationmode.highqualitybilinear;
            rectangle orectangle = new rectangle(0, 0, twidth, theight);
            g.drawimage(imgoutput, orectangle);
            try
            {

                return (bitmap)othumbnail;
            }
            catch (exception ex)
            {
                return null;
            }
            finally
            {
                imgoutput.dispose();
                imgoutput = null;
                mybrowser.dispose();
                mybrowser = null;
            }
        }
    }

}


以下是调用方法，懒省事的方法，嘿嘿，赶时间就不说什么了，反正上面的抓取转换类已经写出来了，大家尽情的用异步，线程等方法自己玩吧！～

    string urlpath;
    bool capturestate = false;
    guid guid;
    protected bool saveoriginalpagetoimage(guid myguid)
    {
//使用guid 来命名
        guid = myguid;
        if (this.currentpageact == pageact.edit)
        {
            string pagepath = request.url.localpath;
            pagepath = pagepath.replace("operation", "capture");

            urlpath = pagepath + "?act=view&projectno=" + _projectno;

            thread newth = new thread(captureimage);
            newth.setapartmentstate(apartmentstate.sta);
            newth.start();
            while (newth.threadstate == threadstate.running)
            {
            }
            //返回截取状态
            return capturestate;
        }
        return false;
    }

    /**//// <summary>
    /// 捕获屏幕
    /// </summary>
    /// <param name="urlpath"></param>
    /// <returns></returns>
    public void captureimage()
    {
        try
        {
            string url = "http://" + request.url.host + ":" + request.url.port.tostring();
            url = url + urlpath;

            getimage thumb = new getimage(url, 1024, 1200, 1024, 1200);
            system.drawing.bitmap x = thumb.getbitmap();
            string filename = datetime.now.tostring("yyyymmddhhmmss");

            x.save(server.mappath("~/capture/savepage") + "\\" + guid + ".jpg");
            capturestate = true;
        }
        catch (exception ex)
        {
            capturestate = false;
        }
    }