protected async override Task<IList> FirstRequestData() { RequestDataEventArgs eventArgs = new RequestDataEventArgs(); if (RequestingData != null) { FirstRequestingData(this, eventArgs); await eventArgs.WaitRequest(); return eventArgs.Result; } else { return null; } }
protected async override Task<IList> RequestData() { RequestDataEventArgs eventArgs = new RequestDataEventArgs(); if (RequestingData != null) { RequestingData(this, eventArgs); await eventArgs.WaitRequest(); if (CanStopRequestingData && (eventArgs.Result == null || eventArgs.Result.Count == 0)) { IsStopRequestingData = true; } return eventArgs.Result; } else { return null; } }