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);
}