The ASP.NET Gridview will display each row/column ("cell") using the active attribute of the backing screen. when the FieldMap.UseScreenAttributes=true. This can be particularly important when there is significant logic in the host being performed to color-code data in the table.
Many host applications include logic to color code or otherwise highlight values on the screen. The runtime DHTML supports this for multi-row lists displayed in the Gridview when you set UseScreenAttributes=true for the FieldMap defining the multi-row list.
Column values are set with attributes from the live screen display