CheckConstraint() [2/2]

override void System.Data.UniqueConstraint.CheckConstraint ( DataRow row, DataRowAction action )

inlinepackage

Definition at line 220 of file UniqueConstraint.cs.

    {
        if (!Table.EnforceConstraints)
        {
            return;
        }
        switch (action)
        {
        case DataRowAction.Rollback:
            if (row._tempRecord == -1)
            {
                break;
            }
            goto case DataRowAction.Change;
        case DataRowAction.Change:
        case DataRowAction.Add:
            if (row.HaveValuesChanged(ColumnsReference) && ConstraintIndex.IsKeyRecordInIndex(row.GetDefaultRecord()))
            {
                object[] columnValues = row.GetColumnValues(ColumnsReference);
                throw ExceptionBuilder.ConstraintViolation(ColumnsReference, columnValues);
            }
            break;
        }
    }

References System.Data.DataRow._tempRecord, System.action, System.Data.UniqueConstraint.ColumnsReference, System.Data.UniqueConstraint.ConstraintIndex, System.Data.ExceptionBuilder.ConstraintViolation(), System.Data.DataTable.EnforceConstraints, System.Data.DataRow.GetColumnValues(), System.Data.DataRow.GetDefaultRecord(), System.Data.DataRow.HaveValuesChanged(), System.Data.Index.IsKeyRecordInIndex(), and System.Data.UniqueConstraint.Table.