private static void ProcessLenses(PhotographySystemEntities context, XElement lense, Manufacturer manufacturer)
{
var modelNode = lense.Attribute("model");
if (modelNode == null)
{
throw new ArgumentException("Model is mandatory for lenses!");
}
var model = modelNode.Value;
var typeNode = lense.Attribute("type");
if (typeNode == null)
{
throw new ArgumentException("Type is required for lenses!");
}
var type = typeNode.Value;
decimal? price = null;
var priceNode = lense.Attribute("price");
if (priceNode != null)
{
price = decimal.Parse(priceNode.Value);
}
Lens processedLense = context.Lenses.FirstOrDefault(l => l.Model == model);
if (processedLense == null)
{
processedLense = new Lens()
{
Model = model,
Type = type,
Price = price,
Manufacturer = manufacturer
};
context.Lenses.AddOrUpdate(processedLense);
context.SaveChanges();
Console.WriteLine("Created lens: {0}", processedLense.Model);
}
else
{
Console.WriteLine("Existing lens: {0}", processedLense.Model);
}
}
private static Manufacturer ProcessManufacturer(PhotographySystemEntities context, XElement manufacturer)
{
var manufacturerNameNode = manufacturer.Element("manufacturer-name");
if (manufacturerNameNode == null)
{
throw new ArgumentException("Manufacturer name is mandatory!");
}
var name = manufacturerNameNode.Value;
var processedManufacturer = context.Manufacturers.FirstOrDefault(m => m.Name == name);
if (processedManufacturer == null)
{
processedManufacturer = new Manufacturer()
{
Name = name
};
context.Manufacturers.Add(processedManufacturer);
context.SaveChanges();
Console.WriteLine("Created manufacturer: {0}", processedManufacturer.Name);
}
else
{
Console.WriteLine("Existing manufacturer: {0}", processedManufacturer.Name);
}
return processedManufacturer;
}
