Uipath Form Designer Activity, Show data from excel file in textArea field without using Data grid

I have created one form using Uipath.Form.Activities, In that I have crea

ted one data grid to show data from my excel and one Text area(Notes) field which should be outside of that grid. But the input data for this text area should be from the excel as per the current row of excel. Current row selection of Datagrid on form can be done using any button. So when that button is clicked on form, Notes(Text area) should reflect data from excel.
Please check the below attached screenshot for more clarification of my query -
Below Image - Fare Rules is Datagrid and coloumns from excel. And Notes section is textArea .
How to get data(from excel) in Notes after clicking ViewRule button for each specific row.