System.Data.LookupNode.Bind C# (CSharp) Method

        internal override void Bind(DataTable table, List<DataColumn> list)
        {
            BindTable(table);
            _column = null;  // clear for rebinding (if original binding was valid)
            _relation = null;

            if (table == null)
                throw ExprException.ExpressionUnbound(ToString());

            // First find parent table

            DataRelationCollection relations;
            relations = table.ParentRelations;

            if (_relationName == null)
            {
                // must have one and only one relation

                if (relations.Count > 1)
                {
                    throw ExprException.UnresolvedRelation(table.TableName, ToString());
                }
                _relation = relations[0];
            }
            else
            {
                _relation = relations[_relationName];
            }
            if (null == _relation)
            {
                throw ExprException.BindFailure(_relationName); // this operation is not clone specific, throw generic exception
            }
            DataTable parentTable = _relation.ParentTable;

            Debug.Assert(_relation != null, "Invalid relation: no parent table.");
            Debug.Assert(_columnName != null, "All Lookup expressions have columnName set.");

            _column = parentTable.Columns[_columnName];

            if (_column == null)
                throw ExprException.UnboundName(_columnName);

            // add column to the dependency list

            int i;
            for (i = 0; i < list.Count; i++)
            {
                // walk the list, check if the current column already on the list
                DataColumn dataColumn = list[i];
                if (_column == dataColumn)
                {
                    break;
                }
            }
            if (i >= list.Count)
            {
                list.Add(_column);
            }

            AggregateNode.Bind(_relation, list);
        }