SqlGeometry 类

The SqlGeometry type represents data in a Euclidean (flat) coordinate system.

继承层次结构

System. . :: . .Object
  Microsoft.SqlServer.Types..::..SqlGeometry

命名空间：  Microsoft.SqlServer.Types
程序集：  Microsoft.SqlServer.Types（在 Microsoft.SqlServer.Types.dll 中）

语法

声明
<SerializableAttribute> _
<SqlUserDefinedTypeAttribute(Format.UserDefined, IsByteOrdered := False,  _
    MaxByteSize := , IsFixedLength := False)> _
<CLSCompliantAttribute(True)> _
Public NotInheritable Class SqlGeometry _
    Implements INullable, IBinarySerialize
用法
Dim instance As SqlGeometry

[SerializableAttribute]
[SqlUserDefinedTypeAttribute(Format.UserDefined, IsByteOrdered = false, 
    MaxByteSize = , IsFixedLength = false)]
[CLSCompliantAttribute(true)]
public sealed class SqlGeometry : INullable, 
    IBinarySerialize

[SerializableAttribute]
[SqlUserDefinedTypeAttribute(Format::UserDefined, IsByteOrdered = false, 
    MaxByteSize = , IsFixedLength = false)]
[CLSCompliantAttribute(true)]
public ref class SqlGeometry sealed : INullable, 
    IBinarySerialize

[<SealedAttribute>]
[<SerializableAttribute>]
[<SqlUserDefinedTypeAttribute(Format.UserDefined, IsByteOrdered = false, 
    MaxByteSize = , IsFixedLength = false)>]
[<CLSCompliantAttribute(true)>]
type SqlGeometry =  
    class
        interface INullable
        interface IBinarySerialize
    end

public final class SqlGeometry implements INullable, IBinarySerialize

SqlGeometry 类型公开以下成员。

构造函数

	名称	说明
	SqlGeometry	Initializes a new instance of the SqlGeometry class.

页首

属性

	名称	说明
	IsNull	Gets a value that indicates whether the SqlGeometry object is null.
	M	Gets the M (measure) value of the SqlGeometry instance. The semantics of the measure value are user-defined.
	Null	Gets a read-only property providing a null instance of the SqlGeometry type.
	STSrid	Gets or sets an integer that represents the Spatial Reference Identifier (SRID) of the instance.
	STX	Gets the X-coordinate property of a Point instance.
	STY	Gets the Y-coordinate property of a Point instance.
	Z	Gets the Z (elevation) value of the instance. The semantics of the elevation value are user-defined.

页首

方法

	名称	说明
	AsGml	Returns the Geography Markup Language (GML) representation of a SqlGeometry instance.
	AsTextZM	Returns the Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation of a SqlGeometry instance, augmented with any Z (elevation) and M (measure) values carried by the instance.
	BufferWithTolerance	Returns a geometric object that represents the union of all point values whose distance from a SqlGeometry instance is less than or equal to a specified value, allowing for a specified tolerance.
	Equals	（从 Object 继承。）
	Filter	Offers a fast, index-only intersection method to determine if a SqlGeometry instance intersects another SqlGeometry instance, assuming an index is available.
	Finalize	（从 Object 继承。）
	GeomFromGml	Constructs a SqlGeometry instance given a representation in the SQL Server subset of the Geography Markup Language (GML).
	GetHashCode	（从 Object 继承。）
	GetType	（从 Object 继承。）
	InstanceOf	Tests if the SqlGeometry instance is the same as the specified type.
	MakeValid	Converts an invalid SqlGeometry instance into a SqlGeometry instance with a valid Open Geospatial Consortium (OGC) type.
	MemberwiseClone	（从 Object 继承。）
	Parse	Returns a SqlGeometry instance from an Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation.
	Point	Constructs a SqlGeometry instance that represents a Point instance from its X and Y values and an SRID.
	Populate	Applies a geometry type call sequence to an IGeometrySink object. The call sequence is a sequential set of figures, lines, and points. SqlGeometry
	Read	Reads a binary representation of a geometry type into a SqlGeometry object. SqlGeometry
	Reduce	Returns an approximation of the given SqlGeometry instance produced by running the Douglas-Peucker algorithm on the instance with the given tolerance.
	STArea	Returns the total surface area of a SqlGeometry instance.
	STAsBinary	Returns the Open Geospatial Consortium (OGC) Well-Known Binary (WKB) representation of a SqlGeometry instance. This value will not contain any Z or M values carried by the instance.
	STAsText	Returns the Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation of a SqlGeometry instance. This text will not contain any Z (elevation) or M (measure) values carried by the instance.
	STBoundary	Returns the boundary of a SqlGeometry instance.
	STBuffer	Returns a geometric object that represents the union of all points whose distance from a SqlGeometry instance is less than or equal to a specified value.
	STCentroid	Returns the geometric center of a SqlGeometry instance consisting of one or more polygons.
	STContains	Specifies whether the calling SqlGeometry instance completely contains another SqlGeometry.
	STConvexHull	Returns an object that represents the convex hull of a SqlGeometry instance.
	STCrosses	Determines whether the calling SqlGeometry instance crosses the specified SqlGeometry instance.
	STDifference	Returns an object that represents the points from one SqlGeometry instance that do not lie within another SqlGeometry instance.
	STDimension	Returns the maximum dimension of a SqlGeometry instance.
	STDisjoint	Determines whether the calling SqlGeometry instance is disjointed when compared against the specified SqlGeometry.
	STDistance	Returns the shortest distance between a point in a SqlGeometry instance and a point in the specified SqlGeometry instance.
	STEndPoint	Returns the end point of a SqlGeometry instance.
	STEnvelope	Returns the minimum axis-aligned bounding rectangle of the instance.
	STEquals	Determines whether the specified SqlGeometry has a point set identical to the calling SqlGeometry.
	STExteriorRing	Returns the exterior ring of a SqlGeometry instance that is a polygon.
	STGeomCollFromText	Returns a SqlGeometry instance from an Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation augmented with any Z (elevation) and M (measure) values carried by the instance.
	STGeomCollFromWKB	Returns a SqlGeometry collection instance from an Open Geospatial Consortium (OGC) Well-Known Binary (WKB) representation.
	STGeometryN	Returns the specified SqlGeometry in a SqlGeometry collection.
	STGeometryType	Returns the Open Geospatial Consortium (OGC) type name represented by a geometry instance. SqlGeometry
	STGeomFromText	Returns a SqlGeometry instance from an Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation augmented with any Z (elevation) and M (measure) values carried by the instance.
	STGeomFromWKB	Returns a SqlGeometry instance from an Open Geospatial Consortium (OGC) Well-Known Binary (WKB) representation.
	STInteriorRingN	Returns the specified interior ring of a Polygon SqlGeometry instance.
	STIntersection	Returns an object that represents the points where a SqlGeometry instance intersects another SqlGeometry instance.
	STIntersects	Determines whether the calling SqlGeometry instance intersects another SqlGeometry.
	STIsClosed	Determines whether the start and end points of the calling SqlGeometry are the same.
	STIsEmpty	Indicates whether the calling SqlGeometry instance is empty.
	STIsRing	Determines whether the calling SqlGeometry instance is a ring.
	STIsSimple	Determines whether the calling SqlGeometry instance is simple.
	STIsValid	Determines whether the SqlGeometry instance is well-formed.
	STLength	Returns the total length of the elements in a SqlGeometry instance.
	STLineFromText	Returns a SqlGeometry instance from an Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation augmented with any Z (elevation) and M (measure) values carried by the instance.
	STLineFromWKB	Returns a SqlGeometry LineString instance from an Open Geospatial Consortium (OGC) Well-Known Binary (WKB) representation.
	STMLineFromText	Returns a SqlGeometry instance from an Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation augmented with any Z (elevation) and M (measure) values carried by the instance.
	STMLineFromWKB	Returns a SqlGeometry MultiLineString instance from an Open Geospatial Consortium (OGC) Well-Known Binary (WKB) representation.
	STMPointFromText	Returns a SqlGeometry instance from an Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation augmented with any Z (elevation) and M (measure) values carried by the instance.
	STMPointFromWKB	Returns a SqlGeometry Point instance from an Open Geospatial Consortium (OGC) Well-Known Binary (WKB) representation.
	STMPolyFromText	Returns a SqlGeometry instance from an Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation with any Z (elevation) and M (measure) values carried by the instance.
	STMPolyFromWKB	Returns a SqlGeometry MultiPolygon instance from an Open Geospatial Consortium (OGC) Well-Known Binary (WKB) representation.
	STNumGeometries	Returns the number of SqlGeometry that comprise a SqlGeometry instance.
	STNumInteriorRing	Returns the number of interior rings of a Polygon SqlGeometry instance.
	STNumPoints	Returns the sum of the number of points in each of the figures in a SqlGeometry instance.
	STOverlaps	Determines whether the specified SqlGeometry overlaps the current SqlGeometry.
	STPointFromText	Returns a SqlGeometry instance from an Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation augmented with any Z (elevation) and M (measure) values carried by the instance.
	STPointFromWKB	Returns a SqlGeometry Point instance from an Open Geospatial Consortium (OGC) Well-Known Binary (WKB) representation.
	STPointN	Returns a specified point in a SqlGeometry instance.
	STPointOnSurface	Returns an arbitrary point located within the interior of a SqlGeometry instance.
	STPolyFromText	Returns a SqlGeometry instance from an Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation augmented with any Z (elevation) and M (measure) values carried by the instance.
	STPolyFromWKB	Returns a SqlGeometry Polygon instance from an Open Geospatial Consortium (OGC) Well-Known Binary (WKB) representation.
	STRelate	Determines whether the calling SqlGeometry is related to the specified SqlGeometry.
	STStartPoint	Returns the start point of a SqlGeometry instance.
	STSymDifference	Returns an object that represents all points that are either in one SqlGeometry instance or another SqlGeometry instance, but not those points that lie in both instances.
	STTouches	Determines whether the specified SqlGeometry touches the current SqlGeometry.
	STUnion	Returns an object that represents the union of a SqlGeometry instance with another SqlGeometry instance.
	STWithin	Determines whether the current SqlGeometry is completely within the specified SqlGeometry instance.
	ToString	Returns the Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation of a SqlGeometry instance augmented with any Z (elevation) and M (measure) values carried by the instance. （覆盖 Object. . :: . .ToString() () () ()。）
	Write	Writes a SqlGeometry instance to a binary stream. SqlGeometry

页首

注释

SQL Server 2008 supports a set of methods for the geometry spatial data type. These methods include methods on geometry that are defined by the Open Geospatial Consortium (OGC) standard and a set of Microsoft extensions to that standard.

线程安全

此类型的任何公共 static（在 Visual Basic 中为 Shared） 成员都是线程安全的。不保证所有实例成员都是线程安全的。

请参阅

参考

Microsoft.SqlServer.Types 命名空间