I created a custom UserControl
where among other controls I have the following
<TextBlock Text="{Binding NameUtility}" />
<TextBlock Text="{Binding TotalCost}" "/>
In the code both binding are declared as follows
public static readonly DependencyProperty SetNameUtilityProperty =
DependencyProperty.Register(
nameof(NameUtility),
typeof(string),
typeof(SummaryInfo));
public string NameUtility
{
get { return (string)GetValue(SetNameUtilityProperty); }
set { SetValue(SetNameUtilityProperty, value); }
}
public static readonly DependencyProperty SetTotalCostProperty =
DependencyProperty.Register(
nameof(TotalCost),
typeof(string),
typeof(SummaryInfo));
public string TotalCost
{
get { return (string)GetValue(SetTotalCostProperty); }
set { SetValue(SetTotalCostProperty, value); }
}
The above control is used in another control XAML as
<Utilities:SummaryInfo NameUtility="GAS" TotalCost="{Binding TotalGasEuro}"/>
The binded variable TotalGasEuro
is correctly declare as follows
private string _totalGasEuro;
public string TotalGasEuro { get => _totalGasEuro; set { _totalGasEuro = value; NotifyPropertyChanged(); } }
When running the app, GAS
shows up, while the binded value, which is updated on runtime, does not. (I removed from the code above graphical portions)
I found out my problem. Looks like to have a binding as the one I was trying to achieve, you need to specify the relative source.
In my case when calling the custom control from XAML:
<Utilities:SummaryInfo NameUtility="GAS" TotalCost="{Binding TotalGasEuro, RelativeSource={RelativeSource AncestorType=UserControl}}"/>
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