STIsValid 方法
Determines whether the SqlGeometry instance is well-formed.
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 STIsValid As SqlBoolean
用法
Dim instance As SqlGeometry
Dim returnValue As SqlBoolean
returnValue = instance.STIsValid()
[SqlMethodAttribute(IsDeterministic = true, IsPrecise = false)]
public SqlBoolean STIsValid()
[SqlMethodAttribute(IsDeterministic = true, IsPrecise = false)]
public:
SqlBoolean STIsValid()
[<SqlMethodAttribute(IsDeterministic = true, IsPrecise = false)>]
member STIsValid : unit -> SqlBoolean
public function STIsValid() : SqlBoolean
返回值
类型：System.Data.SqlTypes. . :: . .SqlBoolean
Returns true if a SqlGeometry instance is well-formed, based on its Open Geospatial Consortium (OGC) type. Returns false if a SqlGeometry instance is not well-formed.
注释
The OGC type of a SqlGeometry instance can be determined by invoking STGeometryType.
SQL Server produces only valid SqlGeometry instances, but allows for the storage and retrieval of invalid instances. A valid instance that represents the same point set of any invalid instance can be retrieved using the MakeValid method.