Wired behavior of RadChart

[Yang]

Hi,

Sorry for my bad English.

I found a similar issue at here: Weird behavior in RadChart (2011Q3) when specifying a max and min value

But I haven't set the max and min value, but still get the same result.

See the following code. When count == 30, everything is fine (see image chart-30.png), but when count > 30, I got wired behavior as illustrated in the image chart-31.png.

Code behind:

public MainPage()
{
    InitializeComponent();
    var count = 31;
    var date = new DateTime(2010, 4, 1);
    var r = new Random();
    AreaSeries series;
    for (int i = 0; i < count; i++)
        for (int j = 0; j < this.radChart.Series.Count; j++)
        {
            series = this.radChart.Series[j] as AreaSeries;
            series.DataPoints.Add(new CategoricalDataPoint()
                                  {
                                      Value = r.Next(10, 21),
                                      Category = date.AddDays(i)
                                  });
        }
}

XAML:

<Grid x:Name="LayoutRoot" Background="Transparent">

    <telerikChart:RadCartesianChart x:Name="radChart">

        <telerikChart:RadCartesianChart.HorizontalAxis>
            <telerikChart:DateTimeCategoricalAxis LabelInterval="10" />
        </telerikChart:RadCartesianChart.HorizontalAxis>

        <telerikChart:RadCartesianChart.VerticalAxis>
            <telerikChart:LinearAxis />
        </telerikChart:RadCartesianChart.VerticalAxis>

        <telerikChart:AreaSeries Fill="Red" CombineMode="Stack" />
        <telerikChart:AreaSeries Fill="Green" CombineMode="Stack" />
        <telerikChart:AreaSeries Fill="Blue" CombineMode="Stack" />

    </telerikChart:RadCartesianChart>

</Grid>

[Victor]

Hi Yang,

Thank you for writing.
Please set the DateTimeComponent property of the DateTimeCategoricalAxis to Ticks. This happens because you have multiple data points in the same category.
Please write again if you have other questions.

Regards,
Victor
the Telerik team

[Yang]

Thanks for your answer. It works perfectly!