Missing Category from the Last Bar in a Dynamically Categorized Bar Chart

Aspose.Slides Product Family
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1

We open a powerpoint with aspose slides for java version 25.5 and do this to a bar chart…

((IChart)shape).getChartData().getCategories().clear();

for (String category : chartShadow.getCategories()) {
  ((IChart)shape).getChartData().getCategories().add(category);
}

Which works fine for a line chart (all categories have labels), but leaves the last bar in a bar chart with an empty category label. All but the last are fine.

Any clue?

2

@dberkman

Cause

The issue you’re experiencing with the last bar in your dynamically categorized bar chart showing an empty category label is likely due to how the chart handles category data. In a bar chart, if the last category is not properly defined or if there is a mismatch in the data being added, it can lead to this behavior.

Solution

To resolve this, ensure that you are correctly adding the categories and that the data points correspond to the categories you’ve defined. Additionally, check if the chart is properly refreshing or validating after you modify the categories.

Code

Here’s a modified version of your code that includes a validation step after adding the categories:

((IChart)shape).getChartData().getCategories().clear();

for (String category : chartShadow.getCategories()) {
    ((IChart)shape).getChartData().getCategories().add(category);
}

// Validate the chart layout after adding categories
((IChart)shape).validateChartLayout();

This ensures that the chart layout is updated to reflect the changes made to the categories.

Next Steps

  1. Implement the above code and check if the last bar now displays the correct category label.
  2. If the issue persists, verify the data points associated with the last category to ensure they are correctly set.
  3. Review the chart type and settings to confirm they are appropriate for the data being visualized.

Please proceed with these steps and let me know if you need further assistance!

3

@dberkman,

Could you please share a sample runnable Java program or standalone console app along with sample PowerPoint presentation file(s) to help us reproduce the issue on our end. We will review your issue soon.

PS. please ensure the files are zipped before attaching them here.

4

Turned out it was a hidden text block causing my problem, but trying to formulate a test for you revealed that. Thank you.

5

@dberkman,

We’re glad to hear your issue has been resolved. Should you have any additional questions or feedback, please don’t hesitate to reach out to us.