C# MVVM Calculating Total
- by LnDCobra
I need to calculate a trade value based on the selected price and quantity. How can
The following is my ViewModel:
class ViewModel : ViewModelBase
{
public Trade Trade
{
get { return _trade; }
set { SetField(ref _trade, value, () => Trade); }
} private Trade _trade;
public decimal TradeValue
{
get { return Trade.Amount * Trade.Price; }
}
}
ViewModelBase inherits INotifyPropertyChanged and contains SetField()
The Following is the Trade class:
public class Trade : INotifyPropertyChaged
{
public virtual Decimal Amount
{
get { return _amount; }
set { SetField(ref _amount, value, () => Amount); }
} private Decimal _amount;
public virtual Decimal Price
{
get { return _price; }
set { SetField(ref _price, value, () => Price); }
} private Decimal _price;
......
}
I know due to the design my TradeValue only gets calculated once (when its first requested) and UI doesn't get updated when amount/price changes. What is the best way of achieving this?
Any help greatly appreciated.
