Hello Daniil
Thanks for your response.
1、I used Data import add-on but it only support excel wih XLSX.
2、System ExcelAction export excel with XLS.
3、If I want to upload excel to update some data.I need to export to XLS and copy data to XLSX first. It very inconvenient for me.
4、So I want to custom my ExcelAction to export excel with XLSX.
5、Some advice to custom my action to implement this?
My action is complete according to the document.
https://doc.cuba-platform.com/manual-7.1/standard_actions.html?_ga=2.134212878.1644498844.1581591846-1943359495.1580363045