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Manual ScaleBreak on Y-axis

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Chart (Obsolete)

This is a migrated thread and some comments may be shown as answers.

Felipe Saldana asked on 12 Feb 2010, 07:27 PM

I am having some trouble getting a scale break to display on my chart.

I only want to have 10 labels on the Y axis so in the BeforeLayout event I do the following

    
                        double max = Math.Floor(chart.PlotArea.YAxis.MaxValue); 
        
                        double step = Math.Round( max / 10); 
        
                        chart.PlotArea.YAxis.Clear(); 
        
                        chart.PlotArea.YAxis.AutoScale = false; 
        
                        chart.PlotArea.YAxis.AddRange(0, max, step); 
        
                        AxisSegment seg = new AxisSegment(); 
        
                        seg.Name = "asdfasdfasdf"; 
        
                        seg.MaxValue = 3000; 
        
                        seg.MinValue = 100; 
        
                        seg.Step = 1000; 
        
                        chart.PlotArea.YAxis.ScaleBreaks.Segments.Add(seg); 
        
                        chart.PlotArea.YAxis.ScaleBreaks.MaxCount = 1; 
        
                        chart.PlotArea.YAxis.ScaleBreaks.Enabled = true;

The range is displays correctly. But when I turn ScaleBreaks.Enabled = true nothing displays on the Y axis. The range does not appear and neither does the ScaleBreak.

Seems like it should be fairly straight forward... anyone have any ideas on why this does not work.

Thanks!

3 Answers, 1 is accepted

answered on 17 Feb 2010, 11:53 AM

Hello Felipe,

I think you need to specify at least two segments when specifying scale breaks manually in order to achieve the desired effect:

    
            ChartSeries series = new ChartSeries(); 
        
            series.AddItem(700); 
        
            series.AddItem(1200); 
        
            series.AddItem(2100); 
        
            series.AddItem(700); 
        
            series.AddItem(3100); 
        
            RadChart1.Series.Add(series); 
        
            RadChart1.PlotArea.YAxis.Clear(); 
        
            RadChart1.PlotArea.YAxis.AutoScale = false; 
        
            RadChart1.PlotArea.YAxis.AddRange(0, 5000, 1000); 
        
            AxisSegment seg2 = new AxisSegment(); 
        
            seg2.MaxValue = 1500; 
        
            seg2.MinValue = 0; 
        
            seg2.Step = 500; 
        
            RadChart1.PlotArea.YAxis.ScaleBreaks.Segments.Add(seg2); 
        
            AxisSegment seg = new AxisSegment(); 
        
            seg.MaxValue = 5000; 
        
            seg.MinValue = 2000; 
        
            seg.Step = 1000; 
        
            RadChart1.PlotArea.YAxis.ScaleBreaks.Segments.Add(seg); 
        
            RadChart1.PlotArea.YAxis.ScaleBreaks.Enabled = true;

Greetings,
Bart.