Simple question.

hitsunny

Get the data from the database first.
SELECT commodity code, commodity name, '' AS commodity category code, '' AS commodity category name FROM TABLE
Shown in DataGrid.
After selecting the button.
Just set DataRow ["Product Category Code"] and DataRow ["Product Category Name"] of DataTable!
DataGrid will automatically display!

hudigirl

Use datagrid, redefine the drop-down list box added to datagrid

maodanyun

Are you in a hurry? I suggest you change the display control
If you are not in a hurry, I will simply make an example for you