// call "AddCarToXML" and add car into XML after refresh tables
private void btnAddCar_Click(object sender, RoutedEventArgs e)
{
var cars = new List <Car>();
if (String.IsNullOrEmpty(nameTextBox.Text) ||
String.IsNullOrEmpty(dateTextBox.Text) ||
String.IsNullOrEmpty(priceTextBox.Text) ||
String.IsNullOrEmpty(dphTextBox.Text))
{
btnInfo.Content = "Zadejte vsechny hodnoty";
}
else
{
XmlData.AddCarToXML(openFile.FileName, nameTextBox.Text, dateTextBox.Text, priceTextBox.Text, dphTextBox.Text);
}
cars = XmlData.LoadXml(openFile.FileName);
carListView.ItemsSource = cars;
grCarList.ItemsSource =
(from c in XmlData.ViewCars(cars)
group c by c.ModelName into g
select new
{
ModelName = g.Key,
dph = g.Select(c => c.DPH),
priceNoDPH = g.Sum(c => c.PriceNoDPH),
priceWithDPH = g.Sum(c => c.PriceWithDph)
}).OrderByDescending(x => x.priceWithDPH);
CollectionView view = (CollectionView)CollectionViewSource.GetDefaultView(grCarList.ItemsSource);
PropertyGroupDescription group = new PropertyGroupDescription("ModelName");
view.GroupDescriptions.Add(group);
}