internal static UniqueConstraint GetUniqueConstraintForColumnSet(ConstraintCollection collection, DataColumn[] columns) { if (null == collection) { throw new ArgumentNullException("Collection can't be null."); } if (null == columns) { return(null); } foreach (Constraint constraint in collection) { if (constraint is UniqueConstraint) { UniqueConstraint uc = constraint as UniqueConstraint; if (DataColumn.AreColumnSetsTheSame(uc.Columns, columns)) { return(uc); } } } return(null); }
public override bool Equals(object key2) { UniqueConstraint cst = key2 as UniqueConstraint; if (null == cst) { return(false); } //according to spec if the cols are equal //then two UniqueConstraints are equal return(DataColumn.AreColumnSetsTheSame(cst.Columns, this.Columns)); }
public override bool Equals(object key) { ForeignKeyConstraint fkc = key as ForeignKeyConstraint; if (null == fkc) { return(false); } //if the fk constrains the same columns then they are equal if (!DataColumn.AreColumnSetsTheSame(this.RelatedColumns, fkc.RelatedColumns)) { return(false); } if (!DataColumn.AreColumnSetsTheSame(this.Columns, fkc.Columns)) { return(false); } return(true); }