Question

I have the following code, first I filter by a foreign key, but then with that result I need to filter more with dates.

But I cant understand the syntax of the select() method of a datarow array given below.

 UC021_WizardStepSelectUnitDataSet.WizardStepSelectUnits_UnitsSelectedInOtherAgreementsRow[] datarows =
                    _uc021_WizardStepSelectUnitDataSet.WizardStepSelectUnits_UnitsSelectedInOtherAgreements.Select(
                        "UnitId = " + row.UnitID).Cast
                        <UC021_WizardStepSelectUnitDataSet.WizardStepSelectUnits_UnitsSelectedInOtherAgreementsRow>().ToArray();

                DataRow[] dr = _uc021_WizardStepSelectUnitDataSet.
                    WizardStepSelectUnits_UnitsSelectedInOtherAgreements.Select(
                        "UnitId = " + row.UnitID);

                if (datarows.Length > 0)
                {
                    dr.Select("");
                }

Answer 1

The Select on DataTable is similar to a Where clause you add to a query, in this case its filtering the records matching the row.UnitID which is to be found under column UnitId of the DataTable.

You can add multiple conditions by using AND within select like

.Select("UnitId = " + row.UnitID+ " AND IsActive='Y'")