void RenderGraphs()
        {
            try
            {
                List <List <KeyValuePair <string, int> > > list = new List <List <KeyValuePair <string, int> > >();
                list.Add(Charting.bloodTransactionData);
                list.Add(Charting.bloodTransactionData2);

                Charting.SetBarChart(bloodTransactionBar, list);

                CalanderReg();
                CalanderEvent();
                CalanderTrans();

                PieBloodByGroup();
                PieAllDonorHBCounts();

                BarDonorWeightDistribution();
                BarChartTransaction();
                BarChartVolumeOfBloodInventory();
            }
            catch (ValidationException ex)
            {
                MessageHandler.ShowErrorMessage(ex.Message);
            }
            catch (ConnectedDalException ex)
            {
                MessageHandler.ShowErrorMessage(ex.Message);
            }
            catch (Exception ex)
            {
                MessageHandler.ShowErrorMessage(ex.Message);
            }
        }