Méthode STPointN
Returns a specified point in a SqlGeometry instance.
Espace de noms : Microsoft.SqlServer.Types
Assembly : Microsoft.SqlServer.Types (en Microsoft.SqlServer.Types.dll)
Syntaxe
'Déclaration
<SqlMethodAttribute(IsDeterministic := True, IsPrecise := True)> _
Public Function STPointN ( _
n As Integer _
) As SqlGeometry
'Utilisation
Dim instance As SqlGeometry
Dim n As Integer
Dim returnValue As SqlGeometry
returnValue = instance.STPointN(n)
[SqlMethodAttribute(IsDeterministic = true, IsPrecise = true)]
public SqlGeometry STPointN(
int n
)
[SqlMethodAttribute(IsDeterministic = true, IsPrecise = true)]
public:
SqlGeometry^ STPointN(
int n
)
[<SqlMethodAttribute(IsDeterministic = true, IsPrecise = true)>]
member STPointN :
n:int -> SqlGeometry
public function STPointN(
n : int
) : SqlGeometry
Paramètres
- n
Type : System. . :: . .Int32
An int expression between 1 and the number of points in the SqlGeometry instance.
Valeur de retour
Type : Microsoft.SqlServer.Types. . :: . .SqlGeometry
A SqlGeometry that represents the specified point in the calling instance.
Notes
If a SqlGeometry instance is user created, STPointN returns the point specified by expression by ordering the points in the order in which they were originally input.
If a SqlGeometry instance was constructed by the system, STPointN returns the point specified by expression by ordering all the points in the same order they would be output: first by geometry, then by ring within the geometry (if appropriate), and then by point within the ring. This order is deterministic.
If this method is called with a value less than 1, it throws an ArgumentOutOfRangeException.
If this method is called with a value greater than the number of points in the instance, it returns null.