useless UniqueConstraint constructors...

19 Apr 2006 1:23 PM

Dan

Hi,

Why there are UniqueConstraint constructors that accept a bool that sets the
constraint as primary key if the flag is not used??

this is the code inside IsPrimaryKey property...

public bool IsPrimaryKey
{
      get
      {
            if (this.Table == null)
            {
                  return false;
            }
            return (this == this.Table.primaryKey);
      }
}

many thanks,
Dan

26 Apr 2006 9:43 PM

Mark Ashton

The UniqueConstraint ctor tracks that boolean so during
table.Constraints.Add, if true and the table doesn't have a primary key - the
constraint will become the primary key.

The IsPrimaryKey property simply returns if this UniqueConstraint instance
is the one used by the DataTable for its primary key.

Show quote

"Dan" wrote:

> Hi,
>
> Why there are UniqueConstraint constructors that accept a bool that sets the
> constraint as primary key if the flag is not used??
>
> this is the code inside IsPrimaryKey property...
>
> public bool IsPrimaryKey
> {
>       get
>       {
>             if (this.Table == null)
>             {
>                   return false;
>             }
>             return (this == this.Table.primaryKey);
>       }
> }
>
> many thanks,
> Dan