Questions

Hi Stuart,

Thanks for reporting this. We’ve managed to reproduce the issue on our side, but haven’t had a chance to investigate it yet.
However, It has been logged to our bug tracker and we are going to take a look. I will update this thread when the issue is fixed or any workaround found,

Best regards,
Yuriy

Hi Yuriy,

Sorry for the delay in responding – for some reason I didn’t get my usual email notification when you posted your comment.

I’ve attached a DevStudio project which shows the issue in all it’s glory and roughly reflects how we use it i.e. the code behind creates a series and adds it.

The app creates two axis, a linear and a log one – use the add test data button while it’s ticked and it will create a visible series on the linear scale. Unchecking the checkBox moves the series onto the Log axis and the chart contents fail to render.

As an additional observation – when you try to force the series back onto the linear axis everything is still gone (i wouldn’t have noticed this in our actual implementation as there is no requirement to swap between axis).
Have Fun
/Stu

Posting an answer so I can include some code:

Hi Andrew,

Ok – finally got that version and it seems to solve the problem as long as all the numbers are positive. It’s still not keen on negative numbers and I’m still failing to see what effect ZeroLineY is having on anything I’m afraid.

if I change the dataSeries in my example solution to the following:

        private void AddData_Click(object sender, RoutedEventArgs e)
    {
        newStackedSeries.StackedGroupId = "Demo";

        // Colour and Size the groups bars
        newStackedSeries.SeriesColor = Colors.Red;
        SolidColorBrush colorBrush = new SolidColorBrush();
        colorBrush.Color = Colors.Red;
        newStackedSeries.FillBrush = colorBrush;
        newStackedSeries.DataPointWidth = 0.9;


        int startX = 1;
        int endX = 50;

        // Create a data series and attach to the StackedSeries
        var newDataSeries = new XyDataSeries<int, double> { SeriesName = "Test Series" };
        for (int x = startX; x <= endX; x++)
        {
            newDataSeries.Append(x, x - 10);
        }            
        newStackedSeries.DataSeries = newDataSeries;
        newStackedSeries.YAxisId = "LinearLeft";
        newStackedSeries.ZeroLineY = 1;

        ChartSurface.RenderableSeries.Add(newStackedSeries);
        ChartSurface.XAxis.VisibleRange = new DoubleRange(startX, endX);

    }

…..so it now includes negative numbers. If I now swap to the log axis I get the same result i.e. the chart is blank. As you see I’ve set the ZeroLineY as a positive number but even if I remove this I get the same result. I was expecting it to ignore every value below the ZeroLineY Value (not sure what it will display for this though)