In my application I am dealing a lot with objects that have a concept of a range, for that reason I abstracted the logic related to ranges into a separate class. Below is the skeleton of the class, though in my application this class does much more (ex. checks for overlapping, containment, equality, uniqueness, etc).
public class Range : INotifyPropertyChanged
{
private int high;
private int low;
public Range(int low, int high)
{
this.low = Low;
this.high = High;
}
public event PropertyChangedEventHandler PropertyChanged;
public int High
{
get
{
return this.high;
}
set
{
this.high = value;
this.OnPropertyChanged();
}
}
public int Low
{
get
{
return this.low;
}
set
{
this.low = value;
this.OnPropertyChanged();
}
}
[NotifyPropertyChangedInvocator]
protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
{
var handler = PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(propertyName));
}
}
}
}
My business logic classes include this Range class and rely on this class to perform range related operations, for example:
public class HeartRateZone : INotifyPropertyChanged
{
private string name;
private bool isSelected;
private Range range;
public HeartRateZone(string name, Range range)
{
this.Range = range;
Name = name;
}
public event PropertyChangedEventHandler PropertyChanged;
public string Name
{
get
{
return this.name;
}
set
{
this.name = value;
this.OnPropertyChanged();
}
}
public bool IsSelected
{
get
{
return this.isSelected;
}
set
{
this.isSelected = value;
this.OnPropertyChanged();
}
}
public Range Range
{
get
{
return this.range;
}
set
{
this.range = value;
this.OnPropertyChanged();
}
}
[NotifyPropertyChangedInvocator]
private void OnPropertyChanged([CallerMemberName] string propertyName = null)
{
var handler = PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(propertyName));
}
}
}
}
I would like to chart my business objects using RangeBarSeries, and my expectation was that I could bind HighBinding and LowBinding properties of the RangeBarSeries to the corresponding High and Low properties of my Range class (see below) embedded in my business logic classes.
Note: DataPointsCollection in the example below, is of type ObservableCollection<HeartRateZones>, where HeartRateZone contains Range class.
<telerikChart:RangeBarSeries x:Name="BarSeries"
CategoryBinding="Name"
ItemsSource="{Binding ElementName=HeartRateZoneChartControl, Path=DataPointsCollection}"
Canvas.ZIndex="2"
HighBinding="Range.High"
LowBinding="Range.Low">
Unfortunately, I am getting this exception:
{System.ArgumentException: Could not find property 'Range.High' for type 'ZonesVisualization.Controls.HeartRateZone'
at Telerik.Windows.DynamicHelper.CreatePropertyValueGetter(Type type, String propertyName)
at Telerik.Windows.Controls.PropertyNameDataPointBinding.GetValue(Object instance)
at Telerik.Windows.Controls.RangeSeriesBaseDataSource.InitializeBinding(DataPointBindingEntry binding)
at Telerik.Windows.Controls.ChartSeriesDataSource.GenerateDataPoint(Object dataItem, Int32 index)
at Telerik.Windows.Controls.ChartSeriesDataSource.BindCore()
at Telerik.Windows.Controls.ChartSeriesDataSource.Bind()
at Telerik.Windows.Controls.ChartSeriesDataSource.Rebind(Boolean itemsSourceChanged, IEnumerable newSource)
at Telerik.Windows.Controls.ChartSeriesDataSource.set_ItemsSource(IEnumerable value)
at Telerik.Windows.Controls.ChartSeries.OnItemsSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
at System.Windows.DependencyObject.RaisePropertyChangeNotifications(DependencyProperty dp, Object oldValue, Object newValue)
at System.Windows.DependencyObject.UpdateEffectiveValue(DependencyProperty property, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, ValueOperation operation)
at System.Windows.Dependen
Attaching a project that reproduces this issue (renamed zip to jpg).
Thanks.
Alex.