Returns the exterior ring of a SqlGeometry instance that is a polygon.
命名空间： Microsoft.SqlServer.Types
程序集： Microsoft.SqlServer.Types（在 Microsoft.SqlServer.Types.dll 中）
语法
声明
<SqlMethodAttribute(IsDeterministic := True, IsPrecise := True)> _
Public Function STExteriorRing As SqlGeometry
用法
Dim instance As SqlGeometry
Dim returnValue As SqlGeometry
returnValue = instance.STExteriorRing()
[SqlMethodAttribute(IsDeterministic = true, IsPrecise = true)]
public SqlGeometry STExteriorRing()
[SqlMethodAttribute(IsDeterministic = true, IsPrecise = true)]
public:
SqlGeometry^ STExteriorRing()
[<SqlMethodAttribute(IsDeterministic = true, IsPrecise = true)>]
member STExteriorRing : unit -> SqlGeometry
public function STExteriorRing() : SqlGeometry
返回值
类型：Microsoft.SqlServer.Types.SqlGeometry
A SqlGeometry object that represents the exterior ring of the calling instance.
注释
This method returns nullnull 引用（在 Visual Basic 中为 Nothing） if the SqlGeometry instance is not a polygon.