In my application I need to have the user select one program (item) from the collection in a listbox. This listbox click event then triggers a sql query of an existing sql server data table using the selected program (item) in the sql 'where' clause. The returned data then will fill a datagridview on the same C# form as the listbox. The selection of the listbox item works. The query and filling of the datagridview does not. Suggestions please!