Hello,
Aspose Cells produces empty trailing columns in CSV when using LightCellsDataProvider.
This bug has been introduced in version 20.4 and it still present in version 20.10.
Code used (LightCellsDataProviderDemo.java):
Workbook wb = new Workbook();
TxtSaveOptions options = new TxtSaveOptions(SaveFormat.CSV);
options.setLightCellsDataProvider(new LightCellsDataProviderDemo(wb, 1, 3, 3));
wb.save("test.csv", options);
Result:
,test_0_1,test_0_2,,,,,,,,...
test_1_0,test_1_1,test_1_2,,,,,,,,...
test_2_0,test_2_1,test_2_2,,,,,,,,...
Best Regards