// Methods
public void Load(string path)
{
if (!System.IO.File.Exists(path))
{
//MessageBox.Show("Billing history file not found - " + path);
return;
}
var document = XDocument.Load(path);
if (document.Root.Attribute("Version").Value != BillingHistoryFileVersion)
{
MessageBox.Show("Billing history file version is invalid - " + path);
return;
}
Bills.Clear();
foreach (XElement element in document.Root.Descendants())
{
if (element.Name == "Bill")
{
var bill = new Bill
(
DateTime.Parse(element.Attribute("Date").Value)
)
{
Total = element.Attribute("Total").Value.AsMoney()
};
var products = element.Element("Products");
foreach (var sub in products.Elements())
{
var product = new Product
(
sub.Attribute("ID").Value.AsInteger(),
sub.Attribute("Name").Value,
sub.Attribute("Price").Value.AsDecimal()
);
bill.AddProduct(product, sub.Attribute("Amount").Value.AsInteger());
}
Bills.Add(bill);
}
}
}
// Methods
private void FormMainLoad(object sender, EventArgs e)
{
CurrentBill = new Bill();
_textBoxProduct.Focus();
}
private void BuyProduct(Product product)
{
Sum += product.Price;
InsertNewOrder(product);
if (CurrentBill == null)
{
CurrentBill = new Bill();
}
CurrentBill.Date = DateTime.Now;
CurrentBill.AddProduct(product);
}