DbSpatialServices.Buffer 方法
定义
从给定值创建代表所有小于或等于 distance 的点的地理值。Creates a geography value representing all points less than or equal to distance from the given value.
重载
| Buffer(DbGeography, Double) |
从给定 DbGeography 值创建代表所有小于或等于 |
| Buffer(DbGeometry, Double) |
从给定 DbGeometry 值创建代表所有小于或等于 |
Buffer(DbGeography, Double)
从给定 DbGeography 值创建代表所有小于或等于 distance 的点的地理值。Creates a geography value representing all points less than or equal to distance from the given DbGeography value.
public:
abstract System::Data::Spatial::DbGeography ^ Buffer(System::Data::Spatial::DbGeography ^ geographyValue, double distance);
public abstract System.Data.Spatial.DbGeography Buffer (System.Data.Spatial.DbGeography geographyValue, double distance);
abstract member Buffer : System.Data.Spatial.DbGeography * double -> System.Data.Spatial.DbGeography
Public MustOverride Function Buffer (geographyValue As DbGeography, distance As Double) As DbGeography
参数
- geographyValue
- DbGeography
地理值。The geography value.
- distance
- Double
指定从 geographyValue 到缓冲区距离的双精度值。A double value specifying how far from geographyValue to buffer.
返回
一个新的 DbGeography 值,它代表所有小于或等于 distance 中的 geographyValue 的点。A new DbGeography value representing all points less than or equal to distance from geographyValue.
例外
geographyValue
geographyValue
适用于
Buffer(DbGeometry, Double)
从给定 DbGeometry 值创建代表所有小于或等于 distance 的点的几何值。Creates a geometry value representing all points less than or equal to distance from the given DbGeometry value.
public:
abstract System::Data::Spatial::DbGeometry ^ Buffer(System::Data::Spatial::DbGeometry ^ geometryValue, double distance);
public abstract System.Data.Spatial.DbGeometry Buffer (System.Data.Spatial.DbGeometry geometryValue, double distance);
abstract member Buffer : System.Data.Spatial.DbGeometry * double -> System.Data.Spatial.DbGeometry
Public MustOverride Function Buffer (geometryValue As DbGeometry, distance As Double) As DbGeometry
参数
- geometryValue
- DbGeometry
几何值。The geometry value.
- distance
- Double
指定从 geometryValue 到缓冲区距离的双精度值。A double value specifying how far from geometryValue to buffer.
返回
一个新的 DbGeometry 值,它代表所有小于或等于 distance 中的 geometryValue 的点。A new DbGeometry value representing all points less than or equal to distance from geometryValue.
例外
geometryValue
geometryValue