CascadeRollback()

void System.Data.ForeignKeyConstraint.CascadeRollback ( DataRow row )

inlinepackage

Definition at line 395 of file ForeignKeyConstraint.cs.

    {
        Index sortIndex = _childKey.GetSortIndex((row.RowState == DataRowState.Deleted) ? DataViewRowState.OriginalRows : DataViewRowState.CurrentRows);
        object[] keyValues = row.GetKeyValues(_parentKey, (row.RowState == DataRowState.Modified) ? DataRowVersion.Current : DataRowVersion.Default);
        if (IsKeyNull(keyValues))
        {
            return;
        }
        Range range = sortIndex.FindRecords(keyValues);
        if (_acceptRejectRule == AcceptRejectRule.Cascade)
        {
            if (range.IsNull)
            {
                return;
            }
            DataRow[] rows = sortIndex.GetRows(range);
            for (int i = 0; i < rows.Length; i++)
            {
                if (!rows[i]._inCascade)
                {
                    rows[i].RejectChanges();
                }
            }
        }
        else if (row.RowState != DataRowState.Deleted && row.Table.DataSet.EnforceConstraints && !range.IsNull && (range.Count != 1 || sortIndex.GetRow(range.Min) != row) && row.HasKeyChanged(_parentKey))
        {
            throw ExceptionBuilder.FailedCascadeUpdate(ConstraintName);
        }
    }

References System.Data.ForeignKeyConstraint._acceptRejectRule, System.Data.ForeignKeyConstraint._childKey, System.Data.ForeignKeyConstraint._parentKey, System.Data.Constraint.ConstraintName, System.Data.Range.Count, System.Data.DataTable.DataSet, System.Data.DataSet.EnforceConstraints, System.Data.ExceptionBuilder.FailedCascadeUpdate(), System.Data.Index.FindRecords(), System.Data.DataRow.GetKeyValues(), System.Data.Index.GetRow(), System.Data.Index.GetRows(), System.Data.DataKey.GetSortIndex(), System.Data.DataRow.HasKeyChanged(), System.Data.ForeignKeyConstraint.IsKeyNull(), System.Data.Range.IsNull, System.Data.Range.Min, System.Data.DataRow.RejectChanges(), System.Data.DataRow.RowState, and System.Data.DataRow.Table.

Referenced by System.Data.ForeignKeyConstraint.CheckCascade().