DbGeography.PolygonFromText(String, Int32) 方法

定义

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

public:
 static System::Data::Spatial::DbGeography ^ PolygonFromText(System::String ^ polygonWellKnownText, int coordinateSystemId);
public static System.Data.Spatial.DbGeography PolygonFromText (string polygonWellKnownText, int coordinateSystemId);
static member PolygonFromText : string * int -> System.Data.Spatial.DbGeography
Public Shared Function PolygonFromText (polygonWellKnownText As String, coordinateSystemId As Integer) As DbGeography

参数

polygonWellKnownText
String

包含知名地理值的文本表示形式的字符串。A string that contains a well known text representation of the geography value.

coordinateSystemId
Int32

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

返回

DbGeography

通过指定坐标系统标识符由知名文本值定义的新的 DbGeography 值。A new DbGeography value as defined by the well known text value with the specified coordinate system identifier.

例外

polygonWellKnownText

coordinateSystemId

适用于