using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            this.Load += new EventHandler(Form1_Load);
            this.Shown += new EventHandler(Form1_Shown);
        }

        WebBrowser webBrowser1 = new WebBrowser();
        int Count = 0;
        const int ClientWidth = 1024;
        const int ClientHeight = 512;
        void Form1_Load(object sender, EventArgs e)
        {
            webBrowser1.Dock = DockStyle.Fill;
            webBrowser1.ScrollBarsEnabled = false;
            this.ClientSize = new Size(ClientWidth, ClientHeight);
            this.Controls.Add(webBrowser1);
            webBrowser1.Navigating += new WebBrowserNavigatingEventHandler(webBrowser1_Navigating);
            webBrowser1.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(webBrowser1_DocumentCompleted);
        }

        void Form1_Shown(object sender, EventArgs e)
        {
            webBrowser1.Navigate("http://a...content-available-to-author-only...h.net/test/read.cgi/software/1335443552/");
        }

        void webBrowser1_Navigating(object sender, WebBrowserNavigatingEventArgs e)
        {
            Interlocked.Increment(ref Count);
        }

        void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {
            Interlocked.Decrement(ref Count);
            if (Count == 0)
            {
                this.SizeSet();
            }
        }

        void SizeSet()
        {
            FormBorderStyle fbs = this.FormBorderStyle;
            this.FormBorderStyle = FormBorderStyle.None;
            Rectangle rect = webBrowser1.Document.Window.Document.Body.ScrollRectangle;
            Bitmap bmp = new Bitmap(rect.Width, rect.Height, PixelFormat.Format32bppArgb);
            int p = rect.Height / ClientHeight;
            int s = rect.Height % ClientHeight;
            Bitmap wbmp1 = new Bitmap(rect.Width, ClientHeight, PixelFormat.Format32bppArgb);
            using (Graphics g = Graphics.FromImage(bmp))
            {
                for (int i = 0; i < p; i++)
                {
                    webBrowser1.Document.Window.ScrollTo(0, ClientHeight * i);
                    this.DrawToBitmap(wbmp1, this.ClientRectangle);
                    //g.DrawImage(wbmp1, 0, ClientHeight * i);
                }
                if (s > 0)
                {
                    this.ClientSize = new Size(ClientWidth, s);
                    webBrowser1.Document.Window.ScrollTo(0, ClientHeight * p);
                    Bitmap wbmp2 = new Bitmap(rect.Width, s, PixelFormat.Format32bppArgb);
                    this.DrawToBitmap(wbmp2, this.ClientRectangle);
                    g.DrawImage(wbmp2, 0, ClientHeight * p);
                    wbmp2.Dispose();
                }
            }
            wbmp1.Dispose();
            this.FormBorderStyle = fbs;
            bmp.Save(Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory) + "\\test.png",
                ImageFormat.Png);
            bmp.Dispose();
        }
    }
}