Class CheckboxGridValidation

CheckboxGridValidation

A DataValidation for a CheckboxGridItem.

 // Add a checkbox grid item to a form and require one response per column.
 var checkboxGridItem = form.addCheckboxGridItem();
 checkboxGridItem.setTitle('Where did you celebrate New Years?')
   .setRows(['New York', 'San Francisco', 'London'])
   .setColumns(['2014', '2015', '2016', '2017']);
 var checkboxGridValidation = FormApp.createCheckboxGridValidation()
   .setHelpText(“Select one item per column.”)
   .requireLimitOneResponsePerColumn()
   .build();
 checkboxGridItem.setValidation(checkboxGridValidation);
 

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Apps Script
Apps Script