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  • 项目

InstanceOf 方法

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

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 InstanceOf ( _
    geometryType As String _
) As SqlBoolean
用法
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

参数

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

返回值

类型：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.

注释

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.