DbSpatialServices.GeometryFromText 方法

定义

创建基于指定已知文本值的新 DbGeometry 值。Creates a new DbGeometry value based on the specified well-known text value.

重载

GeometryFromText(String)

创建基于指定已知文本值的新 DbGeometry 值。Creates a new DbGeometry value based on the specified well-known text value.

GeometryFromText(String, Int32)

创建基于指定已知文本值和坐标系统标识符 (SRID) 的新 DbGeometry 值。Creates a new DbGeometry value based on the specified well-known text value and coordinate system identifier (SRID).

GeometryFromText(String)

创建基于指定已知文本值的新 DbGeometry 值。Creates a new DbGeometry value based on the specified well-known text value.

public:
 abstract System::Data::Spatial::DbGeometry ^ GeometryFromText(System::String ^ wellKnownText);
public abstract System.Data.Spatial.DbGeometry GeometryFromText (string wellKnownText);
abstract member GeometryFromText : string -> System.Data.Spatial.DbGeometry
Public MustOverride Function GeometryFromText (wellKnownText As String) As DbGeometry

参数

wellKnownText
String

包含知名几何图形值的文本表示形式的字符串。A string that contains a well-known text representation of the geometry value.

返回

DbGeometry

通过默认的 DbGeometry 坐标系统标识符 (SRID),由知名文本值定义的新的 DbGeometryDefaultCoordinateSystemIdA new DbGeometry value as defined by the well-known text value with the default DbGeometry coordinate system identifier (SRID) (DefaultCoordinateSystemId).

例外

wellKnownText

适用于

GeometryFromText(String, Int32)

创建基于指定已知文本值和坐标系统标识符 (SRID) 的新 DbGeometry 值。Creates a new DbGeometry value based on the specified well-known text value and coordinate system identifier (SRID).

public:
 abstract System::Data::Spatial::DbGeometry ^ GeometryFromText(System::String ^ wellKnownText, int coordinateSystemId);
public abstract System.Data.Spatial.DbGeometry GeometryFromText (string wellKnownText, int coordinateSystemId);
abstract member GeometryFromText : string * int -> System.Data.Spatial.DbGeometry
Public MustOverride Function GeometryFromText (wellKnownText As String, coordinateSystemId As Integer) As DbGeometry

参数

wellKnownText
String

包含知名几何图形值的文本表示形式的字符串。A string that contains a well-known text representation of the geometry value.

coordinateSystemId
Int32

新建 DbGeometry 值应使用的坐标系的标识符。The identifier of the coordinate system that the new DbGeometry value should use.

返回

DbGeometry

通过指定坐标系统标识符 (SRID) 由知名文本值定义的新的 DbGeometryDefaultCoordinateSystemIdA new DbGeometry value as defined by the well-known text value with the specified coordinate system identifier (SRID) (DefaultCoordinateSystemId).

例外

wellKnownText

coordinateSystemId

适用于