Crear cuentausing System;
using System.Collections.Generic;
using System.Linq;using System.Text;using System.Threading.Tasks;
namespace Libros
{public enum EnumTipoLibro
{ Impreso,Digital
}}/////
using System;
using System.Collections.Generic;
using System.Linq;using System.Text;using System.Threading.Tasks;
namespace Libros
{public interface ITipoLibroParticular
{bool EsRenovable { get; }
bool EsReproducible { get; }
}}/////////
using System;
using System.Collections.Generic;
using System.Linq;using System.Text;using System.Threading.Tasks;
namespace Libros
{public class LibroColleccion: List<TipoLibro>
{public int MayorAnnos()
{return this.Max(r => r.Annos);
}public int MenorAnnos()
{return this.Min(r => r.Annos);
}public int CantImpresoReproducibles()
{return this.Where(r => (r is TipoLibroImpreso)).Count(r => ((TipoLibroImpreso)r).EsReproducible == true);
}public int CantLibrosReproducible()
{ } }}////
using System;
using System.Collections.Generic;
using System.Linq;using System.Text;using System.Threading.Tasks;
namespace Libros
{public class TipoDigital : TipoLibro, ITipoLibroParticular
{public int CantMegas { get; set; }
public TipoDigital()
{base.Tipo = EnumTipoLibro.Digital;
}public bool EsRenovable
{get
{return (Annos > 5) ;
} }public bool EsReproducible
{get
{return (CantMegas < 8) ;
} } }}////////
using System;
using System.Collections.Generic;
using System.Linq;using System.Text;using System.Threading.Tasks;
namespace Libros
{public class TipoLibro
{private int _annos;
private string _titulo;
private string _autor;
public string Titulo
{get { return _titulo; }
set
{if (string.IsNullOrEmpty(value))
{throw new Exception("El titulo no puede ser vacio");
} _titulo = value; } }public string Autor
{get { return _autor; }
set { _autor = value; }
}public int Annos
{get { return _annos; }
set { _annos = value; }
}public EnumTipoLibro Tipo { get; set; }
}}////
using System;
using System.Collections.Generic;
using System.Linq;using System.Text;using System.Threading.Tasks;
namespace Libros
{public class TipoLibroImpreso :TipoLibro, ITipoLibroParticular
{public int CantPaginas{ get;set; }
public TipoLibroImpreso()
{base.Tipo = EnumTipoLibro.Impreso;
}public bool EsRenovable
{get
{return (Annos > 3);
} }public bool EsReproducible
{get
{return (CantPaginas < 500) ;
} } }}//////////////
using System;
using System.Collections.Generic;
using System.Linq;using System.Text;using System.Threading.Tasks;
using System.Windows;using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using Libros;
namespace Libreria
{ /// <summary>
/// Lógica de interacción para MainWindow.xaml
/// </summary>
public partial class MainWindow : Window {LibroColleccion ListaLibros = new LibroColleccion();
public MainWindow()
{InitializeComponent();
}private void btnAgregar_Click(object sender, RoutedEventArgs e)
{ //try
//{
TipoLibro lib = new TipoLibro();
if (rdImpreso.IsChecked.Value)
{lib = new TipoLibroImpreso();
((TipoLibroImpreso)lib).CantPaginas = int.Parse(txtPaginas.Text.Trim());
}if (rdDigital.IsChecked.Value)
{lib = new TipoDigital();
((TipoDigital)lib).CantMegas = int.Parse(txtMegas.Text.Trim());
}lib.Titulo = txtTitulo.Text.Trim();
lib.Autor = txtAutor.Text.Trim();
lib.Annos = int.Parse(txtAnnos.Text.Trim());
ListaLibros.Add(lib);
Datos.ItemsSource = ListaLibros;
Datos.Items.Refresh();
int mayor = ListaLibros.MayorAnnos();
int menor = ListaLibros.MenorAnnos();
int reproducible = ListaLibros.CantImpresoReproducibles();
txtReproducible.Text = reproducible.ToString();
txtMayor.Text = mayor.ToString();
txtMenor.Text = menor.ToString();
//}
//catch (Exception ex)
//{
// MessageBox.Show(ex.Message);
//}
}private void rdImpreso_Checked(object sender, RoutedEventArgs e)
{txtMegas.Text = "";
txtMegas.IsEnabled = false;
txtPaginas.IsEnabled = true;
}private void rdDigital_Checked(object sender, RoutedEventArgs e)
{txtPaginas.Text = "";
txtPaginas.IsEnabled = false;
txtMegas.IsEnabled = true;
} }}
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