Hi Burns, What I trying to achieved is to sort out the data source grid, using the multiple choice question type selection. So if the user want to sort by product name, they just select Product Name in the multiple choice and the page will refresh along with the data source grid. Currently, if I want to do it, I need to create multiple filter with same conditions but different order by. And then use the filter expression attribute for the data source grid. It make easier, if I am able to put the identifier (or variable/keyword) in the order by instead of declaring the column. Thanks