SqlGeography.STArea 方法
Returns the total surface area of a SqlGeography instance.
命名空間： Microsoft.SqlServer.Types
組件： Microsoft.SqlServer.Types (在 Microsoft.SqlServer.Types.dll 中)
'宣告
<SqlMethodAttribute(IsDeterministic := True, IsPrecise := False)> _
Public Function STArea As SqlDouble
'用途
Dim instance As SqlGeography
Dim returnValue As SqlDouble
returnValue = instance.STArea()
[SqlMethodAttribute(IsDeterministic = true, IsPrecise = false)]
public SqlDouble STArea()
[SqlMethodAttribute(IsDeterministic = true, IsPrecise = false)]
public:
SqlDouble STArea()
[<SqlMethodAttribute(IsDeterministic = true, IsPrecise = false)>]
member STArea : unit -> SqlDouble
public function STArea() : SqlDouble
型別：System.Data.SqlTypes.SqlDouble
A SqlDouble value specifying the total surface area. STArea will return 0 if a SqlGeography instance contains only 0- and 1-dimensional figures, or if it is empty.
Results for STArea are returned in the square of the unit of measure used by the spatial reference identifier of the geography instance; for example, if the SRID of the instance is 4326, STArea returns results in square meters.