/// <summary>
/// invoke activity search
/// </summary>
protected void onActivitySearchClick(object sender, CommandEventArgs e)
{
// create activity filter
IndustrialActivitySearchFilter filter = FilterConverter.ConvertToIndustrialActivitySearchFilter(SearchFilter);
// Change activity filter
filter.ActivityFilter = getActivityFilter(e);
LinkSearchRedirecter.ToIndustrialActivity(Response, filter, Sheets.IndustrialActivity.PollutantTransfers);
}