MVVM Binding To Property == Null
- by LnDCobra
I want to show some elements when a property is not null. What is the best way of achieving this?
The following is my ViewModel:
class ViewModel : ViewModelBase
{
public Trade Trade
{
get { return _trade; }
set { SetField(ref _trade, value, () => Trade); }
} private Trade _trade;
}
ViewModelBase inherits INotifyPropertyChanged and contains SetField()
The Following is the Trade class:
public class Trade : INotifyPropertyChaged
{
public virtual Company Company
{
get { return _company; }
set { SetField(ref _company, value, () => Company); }
} private Company _company;
......
}
This is part of my View.xaml
<GroupBox Visibility="{Binding Path=Trade.Company,
Converter={StaticResource boolToVisConverter}}" />
I would like this groupbox to show only if Trade.Company is not null (so when a user selects a company). Would I need to create a custom converter to check for null and return the correct visibility or is there one in .NET?
