TDataConnectionParameter.RefreshOnChange Property
Flag indicating whether the query should automatically refresh when the contents of a cell that provides the parameter value changes. If true, then external data is refreshed using the new parameter value every time there's a change. If false, then external data is only refreshed when requested by the user, or some other event triggers refresh (e.g., workbook opened).
Syntax
Namespace: FlexCel.Core
public Boolean RefreshOnChange { get; set; }