[c#] Problem z tabelo v datasetu - stetje zapisov

Mitja Bonča je 7. jun 2011 ob 22:06 izjavil:

Vrne ti število 0 zato ker je tabela resnično prazna. Ker če bil bila v njej vsaj ena vrstca, bi ti sigutno vrnilo število večje od nič.
PS:Pa saj nič ne dodaš v tabelo, v prvem if stavku, ti samo dodaš prazno vrstico. Kaj pa daš v njo? Nič Poglej primer:

 drTargetRow = this.m_datasetPinus.ACCULOAD_STATUS.NewRow(); // setup new row
 drTarget["ColumnName"] = "Some value"; //dodaj to vrstico, in dodaj tvojo vrednost!
 this.m_datasetPinus.ACCULOAD_STATUS.Rows.Add(drTargetRow); // adds created row into table
 

        void saveParametersToDatabase()
        {
            DataRow drTargetRow;    // target row
            double dNumber = 0;
            bool bOk = false;

            // **** TEST CODE
            //int iRowsTest1 = this.m_datasetPinus.Tables[1].Rows.Count;
            //int iColumnsTest1 = this.m_datasetPinus.Tables[1].Columns.Count;

            //int iRowsTest2 = this.m_datasetPinus.ACCULOAD_STATUS.Rows.Count;
            //int iColumnTest2 = this.m_datasetPinus.ACCULOAD_STATUS.Columns.Count;
            // **** END OF TEST CODE - to be removed

            if (this.m_datasetPinus.ACCULOAD_STATUS.Rows.Count <= 0)
            {
                // table is empty, add record

                drTargetRow = this.m_datasetPinus.ACCULOAD_STATUS.NewRow(); // setup new row
                this.m_datasetPinus.ACCULOAD_STATUS.Rows.Add(drTargetRow);    // adds created row into table
            }
            else
            {
                drTargetRow = this.m_datasetPinus.ACCULOAD_STATUS.Rows[0];  // get first record
                // table is not empty, update last (and only one) record
            }   // if

            // **** TRANSFER VALUES TO RECORD
            drTargetRow[AccuLoadIIIMonitor.TableStatus.FieldNames.
                FIELD_SLAVE_ADDRESS] = this.m_aiAcculoadIIISlaveAddresses[0];

            bOk = this.m_CoreFunctions[0].readNonResetGross(ref dNumber);   // read non resettable gross
            if (!bOk)
                dNumber = 0;
            drTargetRow[AccuLoadIIIMonitor.TableStatus.FieldNames.
                FIELD_NON_RESET_GROSS] = dNumber;

            bOk = this.m_CoreFunctions[0].readNonResetNet(ref dNumber); // read non resettable net
            if (!bOk)
                dNumber = 0;
            drTargetRow[AccuLoadIIIMonitor.TableStatus.FieldNames.
                FIELD_NON_RESET_NET] = dNumber;

            drTargetRow[AccuLoadIIIMonitor.TableStatus.FieldNames.
                FIELD_BATCH_LOADED_GROSS] = 0;
            drTargetRow[AccuLoadIIIMonitor.TableStatus.FieldNames.
                FIELD_BATCH_LOADED_NET] = 0;
            drTargetRow[AccuLoadIIIMonitor.TableStatus.FieldNames.
                FIELD_FLOW_RATE_AVERAGE] = 0;
            drTargetRow[AccuLoadIIIMonitor.TableStatus.FieldNames.
                FIELD_TEMPERATURE] = 0;
            drTargetRow[AccuLoadIIIMonitor.TableStatus.FieldNames.
                FIELD_PRESET] = 0;
            drTargetRow[AccuLoadIIIMonitor.TableStatus.FieldNames.
                FIELD_ARM_PARKED] = this.m_iArmParked;
            drTargetRow[AccuLoadIIIMonitor.TableStatus.FieldNames.
                FIELD_GROUNDING] = this.m_iGrounding;
            drTargetRow[AccuLoadIIIMonitor.TableStatus.FieldNames.
                FIELD_OVERFILL] = this.m_iOverfill;
            drTargetRow[AccuLoadIIIMonitor.TableStatus.FieldNames.
                FIELD_CONDITIONS_PLC] = m_iConditionsPLC;
            drTargetRow[AccuLoadIIIMonitor.TableStatus.FieldNames.
                FIELD_ESD] = this.m_iESD;
            drTargetRow[AccuLoadIIIMonitor.TableStatus.FieldNames.
                FIELD_ALARM_PRESENT] = this.m_bwParams.m_bAlarmCondition;
            drTargetRow[AccuLoadIIIMonitor.TableStatus.FieldNames.
                FIELD_PRODUCT_FLOWING] = this.m_ssProductFlowing.m_bState;
            // **** END OF TRANSFER VALUES TO RECORD

            //int iRowsAffected = this.m_taAcculoadStatusTableAdapter.Update(this.m_datasetPinus); // updates table adapter
            this.m_datasetPinus.ACCULOAD_STATUS.AcceptChanges();
        }   // saveParametersToDatabase()