Version

Library Business Logic

In Visual Basic:

Imports System.ComponentModel
Imports System.Collections.ObjectModel
Public Class LibraryBusinessLogic
    Public Function GetLibrary() As ObservableCollection(Of Category)
        Dim library As New ObservableCollection(Of Category)
        Dim c1 As New Category("Thriller")
        c1.AddBook("0399152970", "S is for Silence", "Sue Grafton")
        c1.AddBook("015601131X", "A Darkening Stain", "Robert Wilson")
        c1.AddBook("0446696269", "Honeymoon", "James Patterson")
        c1.AddBook("0140231706", "Berlin Noir", "Philip Kerr")
        c1.AddBook("0553587889", "Prodigal Son", "Dean Koontz")
        c1.AddBook("0743431685", "A Murder of Quality", "John le Carre")
        c1.AddBook("0553804790", "The Husband", "Dean Koontz")
        c1.AddBook("0743270363", "Consent to Kill: A Thriller", "Vince Flynn")
        c1.AddBook("0142004308", "Dissolution", "C. J. Sansom")
        c1.AddBook("0385510454", "The Broker", "John Grisham")
        library.Add(c1)
        Dim c2 As New Category("Biography")
        c2.AddBook("0743226712", "1776", "David McCullough")
        c2.AddBook("1594200092", "Alexander Hamilton", "Ron Chernow")
        c2.AddBook("0375705244", "Founding Brothers: The Revolutionary Generation", "Joseph J. Ellis")
        c2.AddBook("0679764410", "American Sphinx: The Character of Thomas Jefferson", "Joseph J. Ellis")
        c2.AddBook("0743223136", "John Adams", "David McCullough")
        c2.AddBook("0684824906", "Team of Rivals", "Doris Kearns Goodwin")
        c2.AddBook("0684807610", "Benjamin Franklin : An American Life", "Walter Isaacson")
        c2.AddBook("0385507380", "Andrew Jackson: His Life and Times", "H.W.Brands")
        library.Add(c2)
        Dim c3 As New Category("Computer")
        c3.AddBook("0789728966", "Absolute Beginner's Guide to Computer Basics", "Michael Miller")
        c3.AddBook("0764540742", "PCs for Dummies, Ninth Edition", "Dan Gookin")
        c3.AddBook("0789730332", "How Computers Work, Seventh Edition", "Ron White and Timothy Edward Downs")
        c3.AddBook("0070004846", "Structure and Interpretation of Computer Programs", "Harold Abelson, Gerald Sussman, and Julie Sussman")
        c3.AddBook("1418843725", "Discovering Computers: Fundamentals, Second Edition", "Gary B. Shelly, Thomas J. Cashman, and Misty E. Vermaat")
        c3.AddBook("0132433109", "Data and Computer Communications (8th Edition)", "William Stallings")
        c3.AddBook("1568812698", "Fundamentals of Computer Graphics, Second Ed.", "Peter Shirley, Michael Ashikhmin, Michael Gleicher, and Stephen Marschner")
        c3.AddBook("0764134175", "Dictionary of Computer and Internet Terms", "Douglas Downing, Michael Covington, and Melody Mauldin Covington")
        c3.AddBook("0131432249", "Computers Brief (12th Edition)", "Larry Long and Nancy Long")
        c3.AddBook("0131433512", "Computer Networks and Internets, Fourth Edition", "Douglas E Comer and Ralph E. Droms")
        c3.AddBook("013034074X", "Computer Systems: A Programmer's Perspective", "Randal E. Bryant and David R. O'Hallaron")
        c3.AddBook("0763741493", "Computer Science Illuminated", "Nell B. Dale")
        c3.AddBook("0619213892", "Practical Computer Literacy", "June Jamrich Parsons and Dan Oja")
        c3.AddBook("0321247442", "Introduction to Computer Security", "Matt Bishop")
        c3.AddBook("0789734206", "Easy Computer Basics (Que's Easy Series)", "Michael Miller")
        library.Add(c3)
        Return library
    End Function
    Public Function GetCategory() As Category
        Dim c1 As New Category("Thriller")
        c1.AddBook("0399152970", "S is for Silence", "Sue Grafton")
        c1.AddBook("015601131X", "A Darkening Stain", "Robert Wilson")
        c1.AddBook("0446696269", "Honeymoon", "James Patterson")
        c1.AddBook("0140231706", "Berlin Noir", "Philip Kerr")
        c1.AddBook("0553587889", "Prodigal Son", "Dean Koontz")
        c1.AddBook("0743431685", "A Murder of Quality", "John le Carre")
        c1.AddBook("0553804790", "The Husband", "Dean Koontz")
        c1.AddBook("0743270363", "Consent to Kill: A Thriller", "Vince Flynn")
        c1.AddBook("0142004308", "Dissolution", "C. J. Sansom")
        c1.AddBook("0385510454", "The Broker", "John Grisham")
        Return c1
    End Function
End Class
Public Class Category
    Implements INotifyPropertyChanged
    Dim m_name As String
    Dim m_books As New ObservableCollection(Of Book)
    Public Event PropertyChanged(ByVal sender As Object, _
     ByVal e As System.ComponentModel.PropertyChangedEventArgs) _
     Implements System.ComponentModel.INotifyPropertyChanged.PropertyChanged
    Public Sub New(ByVal name As String)
        Me.Name = name
    End Sub
    Public Sub AddBook(ByVal isbn As String, ByVal title As String, ByVal author As String)
        Me.Books.Add(New Book(isbn, title, author))
    End Sub
    Public Property Name() As String
        Get
            Return m_name
        End Get
        Set(ByVal value As String)
            If m_name <> value Then
                m_name = value
                NotifyPropertyChanged("Name")
            End If
        End Set
    End Property
    Public Property Books() As ObservableCollection(Of Book)
        Get
            Return m_books
        End Get
        Set(ByVal value As ObservableCollection(Of Book))
            If Not m_books.Equals(value) Then
                m_books = value
                NotifyPropertyChanged("Books")
            End If
        End Set
    End Property
    Private Sub NotifyPropertyChanged(ByVal info As String)
        RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs(info))
    End Sub
End Class
Public Class Book
    Implements INotifyPropertyChanged
    Public Event PropertyChanged(ByVal sender As Object, _
      ByVal e As System.ComponentModel.PropertyChangedEventArgs) _
      Implements System.ComponentModel.INotifyPropertyChanged.PropertyChanged
    Dim m_isbn As String
    Dim m_title As String
    Dim m_author As String
    Public Sub New(ByVal isdn As String, ByVal title As String, ByVal author As String)
        Me.Isbn = isdn
        Me.Title = title
        Me.Author = author
    End Sub
    Public Property Isbn() As String
        Get
            Return m_isbn
        End Get
        Set(ByVal value As String)
            If m_isbn <> value Then
                m_isbn = value
                NotifyPropertyChanged("Isbn")
            End If
        End Set
    End Property
    Public Property Title() As String
        Get
            Return m_title
        End Get
        Set(ByVal value As String)
            If m_title <> value Then
                m_title = value
                NotifyPropertyChanged("Title")
            End If
        End Set
    End Property
    Public Property Author() As String
        Get
            Return m_author
        End Get
        Set(ByVal value As String)
            If m_author <> value Then
                m_author = value
                NotifyPropertyChanged("Author")
            End If
        End Set
    End Property
    Private Sub NotifyPropertyChanged(ByVal info As String)
        RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs(info))
    End Sub
End Class

In C#:

using System;
using System.Collections.Generic;
using System.Text;
using System.Collections.ObjectModel;
using System.ComponentModel;
namespace WPF_HelpSampleBrowser
{
    class LibraryBusinessLogic
    {
        public ObservableCollection<Category> GetLibrary()
        {
            ObservableCollection<Category> library = new ObservableCollection<Category>();
            Category c1 = new Category("Thriller");
            c1.AddBook("0399152970", "S is for Silence", "Sue Grafton");
            c1.AddBook("015601131X", "A Darkening Stain", "Robert Wilson");
            c1.AddBook("0446696269", "Honeymoon", "James Patterson");
            c1.AddBook("0140231706", "Berlin Noir", "Philip Kerr");
            c1.AddBook("0553587889", "Prodigal Son", "Dean Koontz");
            c1.AddBook("0743431685", "A Murder of Quality", "John le Carre");
            c1.AddBook("0553804790", "The Husband", "Dean Koontz");
            c1.AddBook("0743270363", "Consent to Kill: A Thriller", "Vince Flynn");
            c1.AddBook("0142004308", "Dissolution", "C. J. Sansom");
            c1.AddBook("0385510454", "The Broker", "John Grisham");
            library.Add(c1);
            Category c2 = new Category("Biography");
            c2.AddBook("0743226712", "1776", "David McCullough");
            c2.AddBook("1594200092", "Alexander Hamilton", "Ron Chernow");
            c2.AddBook("0375705244", "Founding Brothers: The Revolutionary Generation", "Joseph J. Ellis");
            c2.AddBook("0679764410", "American Sphinx: The Character of Thomas Jefferson", "Joseph J. Ellis");
            c2.AddBook("0743223136", "John Adams", "David McCullough");
            c2.AddBook("0684824906", "Team of Rivals", "Doris Kearns Goodwin");
            c2.AddBook("0684807610", "Benjamin Franklin : An American Life", "Walter Isaacson");
            c2.AddBook("0385507380", "Andrew Jackson: His Life and Times", "H.W.Brands");
            library.Add(c2);
            Category c3 = new Category("Computer");
            c3.AddBook("0789728966", "Absolute Beginner's Guide to Computer Basics", "Michael Miller");
            c3.AddBook("0764540742", "PCs for Dummies, Ninth Edition", "Dan Gookin");
            c3.AddBook("0789730332", "How Computers Work, Seventh Edition", "Ron White and Timothy Edward Downs");
            c3.AddBook("0070004846", "Structure and Interpretation of Computer Programs", "Harold Abelson, Gerald Sussman, and Julie Sussman");
            c3.AddBook("1418843725", "Discovering Computers: Fundamentals, Second Edition", "Gary B. Shelly, Thomas J. Cashman, and Misty E. Vermaat");
            c3.AddBook("0132433109", "Data and Computer Communications (8th Edition)", "William Stallings");
            c3.AddBook("1568812698", "Fundamentals of Computer Graphics, Second Ed.", "Peter Shirley, Michael Ashikhmin, Michael Gleicher, and Stephen Marschner");
            c3.AddBook("0764134175", "Dictionary of Computer and Internet Terms", "Douglas Downing, Michael Covington, and Melody Mauldin Covington");
            c3.AddBook("0131432249", "Computers Brief (12th Edition)", "Larry Long and Nancy Long");
            c3.AddBook("0131433512", "Computer Networks and Internets, Fourth Edition", "Douglas E Comer and Ralph E. Droms");
            c3.AddBook("013034074X", "Computer Systems: A Programmer's Perspective ", "Randal E. Bryant and David R. O'Hallaron");
            c3.AddBook("0763741493", "Computer Science Illuminated ", "Nell B. Dale");
            c3.AddBook("0619213892", "Practical Computer Literacy", "June Jamrich Parsons and Dan Oja");
            c3.AddBook("0321247442", "Introduction to Computer Security", "Matt Bishop");
            c3.AddBook("0789734206", "Easy Computer Basics (Que's Easy Series)", "Michael Miller");
            library.Add(c3);
            return library;
        }
        public Category GetCategory()
        {
            Category c1 = new Category("Thriller");
            c1.AddBook("0399152970", "S is for Silence", "Sue Grafton");
            c1.AddBook("015601131X", "A Darkening Stain", "Robert Wilson");
            c1.AddBook("0446696269", "Honeymoon", "James Patterson");
            c1.AddBook("0140231706", "Berlin Noir", "Philip Kerr");
            c1.AddBook("0553587889", "Prodigal Son", "Dean Koontz");
            c1.AddBook("0743431685", "A Murder of Quality", "John le Carre");
            c1.AddBook("0553804790", "The Husband", "Dean Koontz");
            c1.AddBook("0743270363", "Consent to Kill: A Thriller", "Vince Flynn");
            c1.AddBook("0142004308", "Dissolution", "C. J. Sansom");
            c1.AddBook("0385510454", "The Broker", "John Grisham");
            return c1;
        }
    }
    class Category : INotifyPropertyChanged
    {
        string m_name;
        ObservableCollection<Book> m_books = new ObservableCollection<Book>();
        public Category(string name)
        {
            this.Name = name;
        }
        public void AddBook(string isbn, string title, string author)
        {
            this.Books.Add(new Book(isbn, title, author));
        }
        public string Name
        {
            get { return m_name; }
            set
            {
                if (m_name != value)
                {
                    m_name = value;
                    NotifyPropertyChanged("Name");
                }
            }
        }
        public ObservableCollection<Book> Books
        {
            get { return m_books; }
            set
            {
                if (m_books != value)
                {
                    m_books = value;
                    NotifyPropertyChanged("Books");
                }
            }
        }
        #region INotifyPropertyChanged Members
        public event PropertyChangedEventHandler PropertyChanged;
        private void NotifyPropertyChanged(String info)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(info));
            }
        }
        #endregion
    }
    class Book : INotifyPropertyChanged
    {
        string m_isbn;
        string m_title;
        string m_author;
        public Book(string isdn, string title, string author)
        {
            this.Isbn = isdn;
            this.Title = title;
            this.Author = author;
        }
        public string Isbn
        {
            get { return m_isbn; }
            set
            {
                if (m_isbn != value)
                {
                    m_isbn = value;
                    NotifyPropertyChanged("Isbn");
                }
            }
        }
        public string Title
        {
            get { return m_title; }
            set
            {
                if (m_title != value)
                {
                    m_title = value;
                    NotifyPropertyChanged("Title");
                }
            }
        }
        public string Author
        {
            get { return m_author; }
            set
            {
                if (m_author != value)
                {
                    m_author = value;
                    NotifyPropertyChanged("Author");
                }
            }
        }
        #region INotifyPropertyChanged Members
        public event PropertyChangedEventHandler PropertyChanged;
        private void NotifyPropertyChanged(String info)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(info));
            }
        }
        #endregion
    }
}