private Product MapItem(XmlReader reader)
{
if (reader.Name != "product") throw new InvalidOperationException("XML reader is not on a product fragment.");
var product = new Product();
product.Id = int.Parse(reader.GetAttribute("id"));
product.Name = reader.GetAttribute("name");
product.UnitPrice = decimal.Parse(reader.GetAttribute("unitPrice"), CultureInfo.InvariantCulture);
product.Discontinued = bool.Parse(reader.GetAttribute("discontinued"));
return product;
}
public Product Map(XmlReader reader)
{
if(reader == null)
throw new ArgumentNullException("XML reader used when mapping cannot be null.");
if(reader.Name != "product")
throw new InvalidOperationException("XML reader is not on a product fragment.");
var product = new Product();
product.Id = int.Parse(reader.GetAttribute("id"));
product.Name = reader.GetAttribute("name");
product.UnitPrice = decimal.Parse(reader.GetAttribute("unitPrice"));
product.Discontinued = bool.Parse(reader.GetAttribute("discontinued"));
return product;
}
// La clase es responsable de devolver los productos a partir del nombre de un archivo
// abrir el archivo p/obtener los datos
// convertir de xml a objetos
public IEnumerable<Product> GetByFileName(string fileName)
{
var products = new List<Product>();
using (var fs = new FileStream(fileName, FileMode.Open))
{
var reader = XmlReader.Create(fs);
while (reader.Read())
{
if (reader.Name != "product") continue;
var product = new Product();
product.Id = int.Parse(reader.GetAttribute("id"));
product.Name = reader.GetAttribute("name");
product.UnitPrice = decimal.Parse(reader.GetAttribute("unitPrice"));
product.Discontinued = bool.Parse(reader.GetAttribute("discontinued"));
products.Add(product);
}
}
return products;
}