Help with Double-Y Axis

[Eric Robishaw]

Please see the attached project.

I have a multiple series gantt chart, plotting along the Y axis.

Every Y label needs to be plotted for this graph, becuase they represent entities.

However, when you get too many Y labels, you can''t see what''s going on... SO:

I want to have 2 things happen when I get too many labels:
1) Spread them out by zooming in on the graph.
2) Placing 2 Y-Axes. One on the left, one on the right. The one on the left displays every other label, and the one on the right does the alternate labels.

I cannot get this to work with the zoom factor, at all.

I''m probably going about this the completely wrong way, but I''ve tried:

1) IChartAxisLabelModel
2) Adding labels to the labels collection
3) using the label format event.

NONE of them work right.

HELP!!!

[Eric Robishaw]

Sorry...here''s the attachment.

GanttChartSample 2Y-Axis.zip

[Geetha M]

Hi Eric, Thanks for the sample. 1. Please find attached the sample which uses IChartAxisLabelModel to display the labels in Y axis. While doing so please be sure that the Indexed property of the Chart is set to true. 2. You can have the secondary axis at the desired position by creating a new instance of the Chart Axis class. Kindly have a look at the ChartMultipleAxes sample under [Installed Drive]:\Program Files\Syncfusion\Essential Studio\version number\Windows\Chart.Windows\Samples\ChartAxes\ChartMultipleAxesSample to have a better idea about this feature. F42167.zip Please let me know if this helps you. Regards, Geetha.

[Eric Robishaw]

Your example code fails.

Object Reference not set to an instance...

at Series.Add();

This occurs whenever the graph is set to Indexed = true;

Does this value need to be set AFTER adding the series?

If so, does that mean I have to always set it to false first, add the series data, then set it to true? WHen I do it SORT OF WORKS.

OTHER ISSUE NOT ADDRESSED:
After moving the Indexed=true to the end of the InitializeData() method and getting the graph to display:
ZOOM IN , and watch the Y-Axis Labels. They are no longer positioned correctly. This is part of the key problem.

Any ideas?

[Eric Robishaw]

Here''s the BIG problem: Chart.Indexed needs to be moved to the Axis: Chart.PrimaryXAxis.Indexed Look at the attached example (Modified version of your example). When you enable Indexed mode, the graph stops working correctly!!!! You only get one Series per Y Point. THIS IS A REAL PROBLEM. I need Y-Indexed Labels but nothing seems to work correctly.

LabelsImplProb.zip

[Geetha M]

Hi Eric, Thanks for bringing these issues to our attention and I am able to reproduce them. I have logged bug report on this regard and will update you as soon as the fix is available. Please have a look at the attached sample which displays customized labels in Y axis. CustomLabels.zip Kindly let us know if this helps you. Regards, Geetha.

[Geetha M]

Hi Eric, We regret for the inconvenience caused. I believe the sample in my previous update was broken. Please try running the sample attached here and let me know if this helps you. Labels.zip Regards, Geetha.