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GGGopi Govindasamy Syncfusion Team January 2, 2017 09:49 AM UTC
Hi Ashwan,
We have provided a dropdownlist “change” event, while select and unselect the check box, change event will be triggered. In event arguments have the “value” and “selectedText”. We have prepared a sample based on your requirement and we have attached help document and sample in the below link.