C# Класс SharpMap.Data.Providers.GeometryProvider

Datasource for storing a limited set of geometries.

The GeometryProvider doesn’t utilize performance optimizations of spatial indexing, and thus is primarily meant for rendering a limited set of Geometries.

A common use of the GeometryProvider is for highlighting a set of selected features.

The following example gets data within a BoundingBox of another datasource and adds it to the map.

 List<Geometry> geometries = myMap.Layers[0].DataSource.GetGeometriesInView(myBox); VectorLayer laySelected = new VectorLayer("Selected Features"); laySelected.DataSource = new GeometryProvider(geometries); laySelected.Style.Outline = new Pen(Color.Magenta, 3f); laySelected.Style.EnableOutline = true; myMap.Layers.Add(laySelected);

Adding points of interest to the map. This is useful for vehicle tracking etc.

 List<SharpMap.Geometries.Geometry> geometries = new List<SharpMap.Geometries.Geometry>(); //Add two points geometries.Add(new SharpMap.Geometries.Point(23.345,64.325)); geometries.Add(new SharpMap.Geometries.Point(23.879,64.194)); SharpMap.Layers.VectorLayer layerVehicles = new SharpMap.Layers.VectorLayer("Vechicles"); layerVehicles.DataSource = new SharpMap.Data.Providers.GeometryProvider(geometries); layerVehicles.Style.Symbol = Bitmap.FromFile(@"C:\data\car.gif"); myMap.Layers.Add(layerVehicles);

Наследование: SharpMap.Data.Providers.IProvider, IDisposable

Показать файл Открыть проект Примеры использования класса

Открытые методы

Метод	Описание
Close ( ) : void	Closes the datasource
Dispose ( ) : void	Disposes the object
ExecuteIntersectionQuery ( Geometry geom, SharpMap.Data.FeatureDataSet ds ) : void	Throws an NotSupportedException. Attribute data is not supported by this datasource
ExecuteIntersectionQuery ( SharpMap box, SharpMap.Data.FeatureDataSet ds ) : void	Throws an NotSupportedException. Attribute data is not supported by this datasource
GeometryProvider ( SharpMap.Data.FeatureDataRow feature ) : System	Initializes a new instance of the GeometryProvider
GeometryProvider ( FeatureDataTable features ) : System	Initializes a new instance of the GeometryProvider
GeometryProvider ( Geometry geometry ) : System	Initializes a new instance of the GeometryProvider
GeometryProvider ( List geometries ) : System	Initializes a new instance of the GeometryProvider
GeometryProvider ( byte wellKnownBinaryGeometry ) : System	Initializes a new instance of the GeometryProvider
GeometryProvider ( string wellKnownTextGeometry ) : System	Initializes a new instance of the GeometryProvider
GetExtents ( ) : BoundingBox	Boundingbox of dataset
GetFeature ( uint RowID ) : SharpMap.Data.FeatureDataRow	Throws an NotSupportedException. Attribute data is not supported by this datasource
GetFeatureCount ( ) : int	Returns the number of features in the dataset
GetGeometriesInView ( BoundingBox bbox ) : List	Returns features within the specified bounding box
GetGeometryByID ( uint oid ) : Geometry	Returns the geometry corresponding to the Object ID
GetObjectIDsInView ( BoundingBox bbox ) : List	Returns all objects whose boundingbox intersects 'bbox'.
GetXYTolerance ( ) : double?
Open ( ) : void	Opens the datasource

Описание методов

Close() публичный Метод

Closes the datasource

public Close ( ) : void
Результат	void

Dispose() публичный Метод

Disposes the object

public Dispose ( ) : void
Результат	void

ExecuteIntersectionQuery() публичный Метод

Throws an NotSupportedException. Attribute data is not supported by this datasource

public ExecuteIntersectionQuery ( Geometry geom, SharpMap.Data.FeatureDataSet ds ) : void
geom	Geometry
ds	SharpMap.Data.FeatureDataSet	FeatureDataSet to fill data into
Результат	void