<DataTemplate DataType="{x:Type l:Angle}">
<StackPanel Orientation="Horizontal">
<TextBox Text="{Binding Degrees}"/>
<TextBox Text="{Binding Minutes}"/>
<TextBox Text="{Binding Seconds}"/>
</StackPanel>
</DataTemplate>
<StackPanel Grid.Row="0">
<TextBlock>Northern Latitude:</TextBlock>
<ContentPresenter Content="{Binding NorthernLatitude}" />
<TextBlock>Western Longitude:</TextBlock>
<ContentPresenter Content="{Binding WesternLongitude}" />
</StackPanel>
This DataTemplate displays Angle object perfectly, however: when I edit one of the Angle properties and that particular textbox loses focus there is no update of the bound object. Even when I specify UpdateSourceTrigger=LostFocus there is no update.
I'm suspecting that the ContentPresenter is bugging me... Any suggestions
DataTemplate/DataBinding not working.
Rainki
Yes it does:
public class Angle : INotifyPropertyChanged
{
private int _degrees;
public int Degrees
{
get { return _degrees; }
set { _degrees = value; OnPropertyChanged("Degrees"); }
}
private int _minutes;
public int Minutes
{
get { return _minutes; }
set { _minutes = value; OnPropertyChanged("Minutes"); }
}
private double _seconds;
public double Seconds
{
get { return _seconds; }
set { _seconds = value; OnPropertyChanged("Seconds"); }
}
public Angle(int degrees, int minutes, double seconds)
{
_degrees = degrees % 360 + minutes / 60 + Convert.ToInt32(seconds) / 3600;
_minutes = minutes % 60 + Convert.ToInt32(seconds) / 60;
_seconds = seconds % 60;
}
public double ToDouble()
{
return _degrees + _minutes / 60.0 + _seconds / 3600;
}
public double ToRadians()
{
return (this.ToDouble() / 360.0) * (2 * Math.PI);
}
public static Angle GreenwichNorthernLatitude = new Angle(51, 28, 0);
public static Angle GreenwichWesternLongitude = new Angle(0, 0, 0);
#region INotifyPropertyChanged Members
public event PropertyChangedEventHandler PropertyChanged;
protected void OnPropertyChanged(string propertyName)
{
PropertyChangedEventHandler e = PropertyChanged;
if (e != null)
{
e(this, new PropertyChangedEventArgs(propertyName));
}
}
#endregion
}
}
Doooode
Hmmm... solved it.
The Angles that I used in the Bindings are properties of a class called CalendarSettings. After propagation of the PropertyChanged event from Angle to CalendarSettings it worked.
Am I right in concluding that the Binding is NOT listening for changes of the property that it is bound to, but instead is listening for changes on the DataContext object
Kentmw
Does the Angle type fire the correct notifications that its property has been modified through the INotifyPropertyChanged interface
HTH,
Drew