Grouped Bar Chart

[vinicius121]

Hi,

I'm trying to use the grouped column chart. But it doesn't show on the interface after I click a button to display the chart.
Here is the code behind:

public ObservableCollection<ISeries> SeriesCollectionBar { get; set; }

SeriesCollectionBar = new System.Collections.ObjectModel.ObservableCollection<ISeries>();

foreach (DataColumn column in performanceTable.Columns)
{
    SeriesCollectionBar.Add(new ColumnSeries<double>
    {           
        Name = column.ColumnName,
        Values = new ObservableCollection<double> { 2, 4, 6, 1, 7, -2 }
    });
}

I also want to append a new value so I'm doing the following:
SeriesCollectionBar[column.Ordinal].Values.Append(3);
To append, I've declared an extension method as follows:

public static IEnumerable Append(this IEnumerable first, params object[] second)
{
    return first.OfType<object>().Concat(second);
}

The xaml code:
<lvc:CartesianChart Series="{Binding SeriesCollectionBar}"></lvc:CartesianChart>

Any help?

Thanks

[beto-rodriguez]

Hi

Where are you initializing the SeriesCollectionBar property?

// this should be called in the constructor of your VM, otherwise your VM must implement INotifyPropertyChanged
SeriesCollectionBar = new System.Collections.ObjectModel.ObservableCollection<ISeries>();

[vinicius121]

Hi,

I'm not using MVVM. So, I initialize inside the button event. And I have also declared the INotifyPropertyChanged, as below:

private ObservableCollection<ISeries> seriesCollectionBar;
public ObservableCollection<ISeries> SeriesCollectionBar
{
    get { return seriesCollectionBar; }
    set { seriesCollectionBar = value; OnPropertyChanged("SeriesCollectionBar"); }
}

private void OnPropertyChanged(string propertyName)
{
    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}

I don't know what I'm missing...
Any other suggestions?
Thanks

[beto-rodriguez]

I am closing this issue for now, please feel free to create a new issue if the error persist, please try to include a small repository or the steps to recreate the issue.