The Complete Program

This program isn't included in the codebin because it is very specific to the website it targets and therefore can't actually be run. 

The full listing of the program as described is:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Text.RegularExpressions;

namespace NetUse
{
 public partial class Form1 : Form
 {
  private int page;
  private WebBrowser webBrowser1;
  public Form1()
  {
   InitializeComponent();
  }

  private void makeBrowser()
  {
   webBrowser1 = new System.Windows.
                       Forms.WebBrowser();
   webBrowser1.Name = "webBrowser1";
  }


  private void showBrowserInForm()
  {
   webBrowser1.Location = new    
           System.Drawing.Point(12, 300);
   webBrowser1.MinimumSize = new
           System.Drawing.Size(20, 20);
   webBrowser1.Size = new
           System.Drawing.Size(783, 338);
   webBrowser1.TabIndex = 1;
   Controls.Add(webBrowser1);
  }


  private void button1_Click(
           object sender,
           EventArgs e)
  {
   page = 1;
   makeBrowser();
   showBrowserInForm();
   webBrowser1.DocumentCompleted += new    
    WebBrowserDocumentCompletedEventHandler
                      (DocumentCompleted);
   webBrowser1.Navigate("login URL");
  }
 

  private void login()
  {
   HtmlElement name = webBrowser1.Document.
             GetElementById("txtUserName");
   if (name != null)
   {
     name.InnerText = "User name";
   }
   HtmlElement password =webBrowser1.
     Document.GetElementById("pasPassword");
   if (password != null)
   {
     password.InnerText = "password";
   }
   HtmlElement submit = webBrowser1.
    Document.GetElementById("login-submit");
   if (submit != null)
   {
    submit.InvokeMember("click");
   }
  }


  private void gotoData()
  {
   webBrowser1.Navigate("URL of Data Page");
  }


  private void getData()
  {
   string text = webBrowser1.DocumentText;
   Regex ex1 = new
                Regex(@"used\s+(\d+.\d+)");
   string used = ex1.Match(text).
                         Groups[1].ToString();
   textBox1.Text = used;
   webBrowser1.Dispose();
  }

  void DocumentCompleted(
           object sender,    
    WebBrowserDocumentCompletedEventArgs e)
  {
   if ( webBrowser1.ReadyState!=
     WebBrowserReadyState.Complete) return;
   switch (page)
   {
    case 1:
     page = 2;
     login();
     break;
    case 2:
     page = 3;
     gotoData();
     break;
    case 3:
     page = 4;
     getData();
     break;
   }

  }
 }
}

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