pathfinder.h

最短路径查询,用的是ESRI公司arcobject组件开发的,已经作成dll,用起来非常的方便

/*
 Copyright 1995-2004 ESRI

 All rights reserved under the copyright laws of the United States.

 You may freely redistribute and use this sample code, with or without modification.

 Disclaimer: THE SAMPLE CODE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED 
 WARRANTIES, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 
 FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ESRI OR 
 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 
 OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 INTERRUPTION) SUSTAINED BY YOU OR A THIRD PARTY, HOWEVER CAUSED AND ON ANY 
 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ARISING IN ANY 
 WAY OUT OF THE USE OF THIS SAMPLE CODE, EVEN IF ADVISED OF THE POSSIBILITY OF 
 SUCH DAMAGE.

 For additional information contact: Environmental Systems Research Institute, Inc.

 Attn: Contracts Dept.

 380 New York Street

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 Email: [e-mail]
*/
// PathFinder.h : Declaration of the CPathFinder

#ifndef __PATHFINDER_H_
#define __PATHFINDER_H_

#include "resource.h"       // main symbols

/////////////////////////////////////////////////////////////////////////////
// CPathFinder
class ATL_NO_VTABLE CPathFinder : 
	public CComObjectRootEx<CComSingleThreadModel>,
	public CComCoClass<CPathFinder, &CLSID_PathFinder>,
	public IPathFinder
{
public:
	CPathFinder()
	{
	}

DECLARE_REGISTRY_RESOURCEID(IDR_PATHFINDER)

DECLARE_PROTECT_FINAL_CONSTRUCT()

BEGIN_COM_MAP(CPathFinder)
	COM_INTERFACE_ENTRY(IPathFinder)
END_COM_MAP()

// IPathFinder
public:
	STDMETHOD(SolvePath)(BSTR WeightName);
	STDMETHOD(get_PathPolyLine)(/*[out, retval]*/ IPolyline* *pVal);
	STDMETHOD(get_PathCost)(/*[out, retval]*/ double *pVal);
	STDMETHOD(get_Map)(/*[out, retval]*/ IMap* *pVal);
	STDMETHOD(putref_Map)(/*[in]*/ IMap* newVal);
	STDMETHOD(get_StopPoints)(/*[out, retval]*/ IPointCollection* *pVal);
	STDMETHOD(putref_StopPoints)(/*[in]*/ IPointCollection* newVal);
	STDMETHOD(OpenAccessNetwork)(BSTR AccessFileName, BSTR FeatureDatasetName);
	STDMETHOD(OpenFeatureDatasetNetwork)(IFeatureDataset* FeatureDS);
private:
	IGeometricNetworkPtr   m_ipGeometricNetwork;
    IMapPtr                m_ipMap;
    IPointCollectionPtr    m_ipPoints;
    IPointToEIDPtr         m_ipPointToEID;
    double                 m_dblPathCost;
    IEnumNetEIDPtr         m_ipEnumNetEID_Junctions;
    IEnumNetEIDPtr         m_ipEnumNetEID_Edges;
	IPolylinePtr           m_ipPolyline;
	HRESULT InitializeNetworkAndMap(IFeatureDatasetPtr FeatureDataset);
	void CloseWorkspace();
};

#endif //__PATHFINDER_H_