Zoom Problem

[kelias]

When I attempt to zoom a chart I'm getting an exception being thrown by ChartFx: ArgumentOutOfRangeException.

I have a basic chart, and I add a Line series that uses Dates as the X axis. Then I bind to an observablecollection that has the data points.

The chart displays fine but when I click on button2 to do a zoom I get the error.

Any ideas why this is happening?

private void button2_Click(object sender, RoutedEventArgs e)

{

chart1.Zoom.Mode = ZoomMode.Selection;

}

private void NormalLineChart()

{

chart1.Series.Clear();

chart1.AxesY.Clear();

chart1.LegendBox.Visibility = Visibility.Visible;

Axis a = new Axis();

a.Min = 0;

a.Max = 50;

SeriesAttributes series = new SeriesAttributes("What");

series.BindingPathX = "When";

series.Gallery = Gallery.Line;

series.AxisY = a;

series.Marker.Visibility = Visibility.Collapsed;

series.StrokeThickness = 2;

chart1.Series.Add(series);

chart1.AxisX.Labels.Format = AxisFormat.Date;

chart1.ItemsSource = LoadRandomDateTimeData(10, 0, 50, 10);

}

private ObservableCollection LoadRandomDateTimeData(int seed, int min, int max, int correlation)

{

ObservableCollection dps = new ObservableCollection();

Random rnd = new Random(seed);

int last = min;

for (int i = 0; i < 100; i++)

{

int itm = rnd.Next(last - correlation, last + correlation);

if (itm < min) itm = rnd.Next(min, last + correlation);

if (itm > max) itm = rnd.Next(last - correlation, max);

last = itm;

dps.Add(new DataPoint(itm, DateTime.Today.AddDays(i)));

}

return dps;

}

public class DataPoint : INotifyPropertyChanged

{

private double what;

private DateTime when;

public DataPoint()

{

}

public DataPoint(double what, DateTime when)

{

What = what;

When = when;

}

public double What

{

get { return what; }

set

{

what = value;

if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs("What"));

}

}

public DateTime When

{

get { return when; }

set

{

when = value;

if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs("When"));

}

}

public event PropertyChangedEventHandler PropertyChanged;

}

[kelias]

Any ideas?

[JuanC]

 We expect any axis used in the chart to be in either the AxesY or AxesX collection, please add this line of code after you customize your new axis

  chart1.AxesY.Add(a);

e.g.

  Axis a = new Axis();

  a.Min = 0;

  a.Max = 50;

  chart1.AxesY.Add(a);

...

I Apologize for our delay answering this question.

JuanC