Mega Code Archive
Online Book Browser
<![CDATA[
/*
Mastering Visual C#.Net
# Paperback: 800 pages
# Publisher: Sybex; 1st edition (August 20, 2002)
# Language: English
# ISBN-10: 0782129110
# ISBN-13: 978-0782129113
*/
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.IO;
using System.Text.RegularExpressions;
class Book
{
public string BookTitle;
public string BookURL;
public Book( string title, string url)
{
BookTitle = title;
BookURL = url;
}
public override string ToString()
{
return BookTitle;
}
}
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void bookCheckButton_Click(object sender, EventArgs e)
{
GetWebPage("http://www.apress.com/book/forthcoming.html");
}
private MatchCollection GetBookDetailsFromWebPage(string webPage)
{
// Use a regex here to find all the book info
Regex newBooksRegEx =
new Regex(
"<a href=\"(/book/bookDisplay\\.html\\?bID=[0-9]+)\">([^<]+)</a>",
RegexOptions.Singleline);
return newBooksRegEx.Matches(webPage);
}
private void AddBooksToListBox(MatchCollection books)
{
foreach (Match bookMatch in books)
{
bookList.Items.Add(
new Book(bookMatch.Groups[2].Value, bookMatch.Groups[1].Value)
);
}
}
private void GetWebPage(string url)
{
WebClient web = new WebClient();
web.DownloadStringCompleted +=
new DownloadStringCompletedEventHandler(DownloadComplete);
web.DownloadProgressChanged +=
new DownloadProgressChangedEventHandler(ProgressChanged);
bookList.Items.Clear();
web.DownloadStringAsync(new System.Uri(url));
}
private void ProgressChanged(object sender, ProgressChangedEventArgs e)
{
downloadProgress.Value = e.ProgressPercentage;
}
private void DownloadComplete(object sender, DownloadStringCompletedEventArgs e)
{
downloadProgress.Value = 100;
if (!e.Cancelled)
{
string newBooksPage = e.Result;
AddBooksToListBox(
GetBookDetailsFromWebPage(newBooksPage)
);
}
}
private void bookList_DoubleClick(object sender, EventArgs e)
{
if (bookList.SelectedIndex != -1)
{
Book selectedBook = (Book)bookList.SelectedItem;
browser.Navigate("http://www.apress.com/" + selectedBook.BookURL, true);
}
}
}
partial class Form1
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.bookList = new System.Windows.Forms.ListBox();
this.bookCheckButton = new System.Windows.Forms.Button();
this.browser = new System.Windows.Forms.WebBrowser();
this.downloadProgress = new System.Windows.Forms.ProgressBar();
this.SuspendLayout();
//
// bookList
//
this.bookList.FormattingEnabled = true;
this.bookList.Location = new System.Drawing.Point(12, 40);
this.bookList.Name = "bookList";
this.bookList.Size = new System.Drawing.Size(410, 355);
this.bookList.Sorted = true;
this.bookList.TabIndex = 0;
this.bookList.DoubleClick += new System.EventHandler(this.bookList_DoubleClick);
//
// bookCheckButton
//
this.bookCheckButton.Location = new System.Drawing.Point(304, 11);
this.bookCheckButton.Name = "bookCheckButton";
this.bookCheckButton.Size = new System.Drawing.Size(118, 23);
this.bookCheckButton.TabIndex = 1;
this.bookCheckButton.Text = "Check for books";
this.bookCheckButton.Click += new System.EventHandler(this.bookCheckButton_Click);
//
// browser
//
this.browser.Location = new System.Drawing.Point(0, 0);
this.browser.Name = "browser";
this.browser.Size = new System.Drawing.Size(282, 34);
this.browser.TabIndex = 0;
this.browser.Visible = false;
//
// downloadProgress
//
this.downloadProgress.Location = new System.Drawing.Point(12, 401);
this.downloadProgress.Name = "downloadProgress";
this.downloadProgress.Size = new System.Drawing.Size(410, 23);
this.downloadProgress.TabIndex = 2;
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(436, 447);
this.Controls.Add(this.downloadProgress);
this.Controls.Add(this.browser);
this.Controls.Add(this.bookCheckButton);
this.Controls.Add(this.bookList);
this.Name = "Form1";
this.Text = "Find forthcoming Apress Books";
this.ResumeLayout(false);
}
#endregion
private System.Windows.Forms.ListBox bookList;
private System.Windows.Forms.Button bookCheckButton;
private System.Windows.Forms.WebBrowser browser;
private System.Windows.Forms.ProgressBar downloadProgress;
}
public class OnlineBookBrowser
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.Run(new Form1());
}
}
]]>