protected string GetTrackingUrl(object dataItem) { TrackingNumber trackingNumber = (TrackingNumber)dataItem; if (trackingNumber.ShipGateway != null) { IShippingProvider provider = trackingNumber.ShipGateway.GetProviderInstance(); TrackingSummary summary = provider.GetTrackingSummary(trackingNumber); if (summary != null) { // TRACKING DETAILS FOUND if (summary.TrackingResultType == TrackingResultType.InlineDetails) { // send to view tracking page return(string.Format("ViewTrackingNumber.aspx?TrackingNumberId={0}", trackingNumber.Id.ToString())); } else if (summary.TrackingResultType == TrackingResultType.ExternalLink) { return(summary.TrackingLink); } } } return(string.Empty); }