public CostViewModel()
{
currentCost = new Cost();
orderOperationsObj = new OrderOperations();
supplierOperationsObj = new SupplierOperations();
costOperationObj = new CostOperations();
LoadData();
suppliersList = new ObservableCollection <Supplier>(supplierOperationsObj.GetAllSuppliers());
ordersList = new ObservableCollection <Order>(orderOperationsObj.GetAllOrders());
addCost = new CostCommands(Add);
searchCost = new CostCommands(Search);
updateCost = new CostCommands(Update);
deleteCost = new CostCommands(Delete);
currentCost.PurchaseDate = DateTime.Today;
//Console.WriteLine($" nr faktury {CostsList[0].InvoiceNr}");
}
private void LoadData()
{
SuppliersList = new ObservableCollection <Supplier>(supplierOperationsObj.GetAllSuppliers());
}