Hi Handoyo,
Thanks for contacting Syncfusion Support.
If your requirement is to update or modify the dataset query and populate the data for report, then you can use expression in dataset query or use parameter value as input to the dataset command text. Also dataset tag in report file can be edited at code behind as given in the below knowledge base.
If we have misunderstood your requirement, please share more details on your requirement.
Regards,
Vinoth S.