Hi Thao,
Thank you for contacting Syncfusion support.
Currently, we don’t have any built-in option for handling operator with case sensitivity in QueryBuilder. However, we have considered this as an improvement and created task for “Support for case sensitive value detection in QueryBuilder”.
And the fix for this improvement will be included in our Essential Studio 2019 Volume 1 Service Pack 1 release which will be available in the month of April 2019. We appreciate your patience until then.
Meanwhile, you can track the status of this improvement through our feedback portal below.
Regards,
Silambarasan