SqlGeography.STLength 方法
Returns the total length of the elements in a SqlGeography instance or the SqlGeography instances within a GeometryCollection.
命名空間： Microsoft.SqlServer.Types
組件： Microsoft.SqlServer.Types (在 Microsoft.SqlServer.Types.dll 中)
語法
'宣告
<SqlMethodAttribute(IsDeterministic := True, IsPrecise := False)> _
Public Function STLength As SqlDouble
'用途
Dim instance As SqlGeography
Dim returnValue As SqlDouble
returnValue = instance.STLength()
[SqlMethodAttribute(IsDeterministic = true, IsPrecise = false)]
public SqlDouble STLength()
[SqlMethodAttribute(IsDeterministic = true, IsPrecise = false)]
public:
SqlDouble STLength()
[<SqlMethodAttribute(IsDeterministic = true, IsPrecise = false)>]
member STLength : unit -> SqlDouble
public function STLength() : SqlDouble
傳回值
型別：System.Data.SqlTypes.SqlDouble
A SqlDouble value containing the total length.
備註
If a SqlGeography instance is closed, its length is calculated as the total length around the instance; the length of any polygon is its perimeter, and the length of a point is 0. The length of a GeometryCollection is found by calculating the sum of the lengths of all of the SqlGeography instances contained within the collection.