共用方式為

  • 發行項

InstanceOf 方法

Tests if the SqlGeography instance is the same as the specified type.

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 := True)> _
Public Function InstanceOf ( _
    geometryType As String _
) As SqlBoolean
'用途
Dim instance As SqlGeography
Dim geometryType As String
Dim returnValue As SqlBoolean

returnValue = instance.InstanceOf(geometryType)

[SqlMethodAttribute(IsDeterministic = true, IsPrecise = true)]
public SqlBoolean InstanceOf(
    string geometryType
)

[SqlMethodAttribute(IsDeterministic = true, IsPrecise = true)]
public:
SqlBoolean InstanceOf(
    String^ geometryType
)

[<SqlMethodAttribute(IsDeterministic = true, IsPrecise = true)>]
member InstanceOf : 
        geometryType:string -> SqlBoolean 

public function InstanceOf(
    geometryType : String
) : SqlBoolean

參數

  • geometryType
    型別：System. . :: . .String
    A string that specifies one of the 12 types exposed in the geography type hierarchy.

傳回值

型別：System.Data.SqlTypes. . :: . .SqlBoolean
A SqlBoolean value that indicates whether the SqlGeography instance is the same as the specified geometry type.
Returns true if the type of a geography instance is the same as the specified type, or if the specified type is an ancestor of the instance type; otherwise, returns false.

備註

The input for the method must be one of the following: T:Microsoft.SqlServer.Types.SqlGeometry, Point, Curve, LineString, Surface, Polygon, GeometryCollection, MultiSurface, MultiPolygon, MultiCurve, MultiLineString, and MultiPoint.

This method throws an ArgumentException if any other strings are used for the input.