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