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)
語法
'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
傳回值
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.
備註
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.