通过

STIsRing 方法

Determines whether the calling SqlGeometry instance is a ring.

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 := False)> _
Public Function STIsRing As SqlBoolean
用法
Dim instance As SqlGeometry
Dim returnValue As SqlBoolean

returnValue = instance.STIsRing()

[SqlMethodAttribute(IsDeterministic = true, IsPrecise = false)]
public SqlBoolean STIsRing()

[SqlMethodAttribute(IsDeterministic = true, IsPrecise = false)]
public:
SqlBoolean STIsRing()

[<SqlMethodAttribute(IsDeterministic = true, IsPrecise = false)>]
member STIsRing : unit -> SqlBoolean 

public function STIsRing() : SqlBoolean

返回值

类型：System.Data.SqlTypes. . :: . .SqlBoolean
Returns true if a geometry instance fulfills the following requirements:

  • It is a LineString instance.

  • It is closed.

  • It is simple.

Returns false if the LineString instance does not meet the requirements.

注释

For a SqlGeometry instance to be closed and simple, both STIsClosed and STIsSimple must return true when invoked on the instance. To determine the instance type of a SqlGeometry, use STGeometryType.