public static INALayer CreateRouteAnalysisLayer(string layerName, INetworkDataset networkDataset,
INARouteSolver naRouteSolver)
{
INASolverSettings settings = naRouteSolver as INASolverSettings;
INASolver solver = naRouteSolver as INASolver;
IDatasetComponent component = networkDataset as IDatasetComponent;
IDENetworkDataset dataElement = component.DataElement as IDENetworkDataset;
INAContext context = solver.CreateContext(dataElement, layerName);
(context as INAContextEdit).Bind(networkDataset, new GPMessagesClass());
INALayer layer = solver.CreateLayer(context);
(layer as ILayer).Name = layerName;
naRouteSolver.FindBestSequence = true;
naRouteSolver.PreserveFirstStop = true;
naRouteSolver.PreserveLastStop = false;
naRouteSolver.UseTimeWindows = false;
naRouteSolver.OutputLines = esriNAOutputLineType.esriNAOutputLineTrueShapeWithMeasure;
IStringArray restrictionAttributeNames = settings.RestrictionAttributeNames;
restrictionAttributeNames.Add("Oneway");
settings.RestrictionAttributeNames = restrictionAttributeNames;
solver.UpdateContext(context, dataElement, new GPMessagesClass());
return(layer);
}
/// <summary>
/// 设置解决器 暂时没有使用到
/// 有问题待修正
/// </summary>
/// <param name="pNAContext"></param>
private static void SetSolverSettings(INAContext pNAContext)
{
if (pNAContext.Solver.CanAccumulateAttributes)
{
INASolver naSolver = pNAContext.Solver;
INARouteSolver naRouteSolver = naSolver as INARouteSolver;
naRouteSolver.FindBestSequence = true;
naRouteSolver.PreserveFirstStop = true;
naRouteSolver.PreserveLastStop = false;
naRouteSolver.UseTimeWindows = false;
naRouteSolver.OutputLines = esriNAOutputLineType.esriNAOutputLineTrueShapeWithMeasure;
INASolverSettings2 naSolverSettings = naSolver as INASolverSettings2;
IStringArray restrictions = naSolverSettings.RestrictionAttributeNames;
restrictions.Add("Oneway");
naSolverSettings.RestrictionAttributeNames = restrictions;
//基于上述设置更新Solver
naSolver.UpdateContext(pNAContext, GetDENetworkDataset(pNAContext.NetworkDataset), new GPMessagesClass());
}
}
//the rest of the class if for the best route
/*
* '*********************************************************************************
' Set Route Solver Settings
'*********************************************************************************
* */
public void SetSolverSettings(ref INAContext pContext , string sImpedanceName,bool bOneWay ,bool bUseHierarchy)
{
INASolver pSolver;
pSolver = pContext.Solver;
INARouteSolver pRteSolver=pSolver as INARouteSolver;
pRteSolver.OutputLines =esriNAOutputLineType.esriNAOutputLineTrueShapeWithMeasure;
pRteSolver.CreateTraversalResult = true;
pRteSolver.UseTimeWindows = false;
pRteSolver.FindBestSequence = false;
pRteSolver.PreserveFirstStop = false;
pRteSolver.PreserveLastStop = false;
//Set generic Solver settings
// set the impedance attribute
INASolverSettings pSolverSettings=pSolver as INASolverSettings;
pSolverSettings.ImpedanceAttributeName = sImpedanceName;
// Set the OneWay Restriction if necessary
IStringArray restrictions;
restrictions = pSolverSettings.RestrictionAttributeNames;
restrictions.RemoveAll();
if(bOneWay==true)
restrictions.Add("oneway");
pSolverSettings.RestrictionAttributeNames=restrictions;
/*
* 'Restrict UTurns
* */
pSolverSettings.RestrictUTurns =esriNetworkForwardStarBacktrack.esriNFSBNoBacktrack;
//IgnoreInvalidLocations allows the network analyst solvers to ignore locations that have not snapped to a network edge
pSolverSettings.IgnoreInvalidLocations=true;
if(bUseHierarchy==true)
{
pSolverSettings.UseHierarchy=true;
pSolverSettings.HierarchyAttributeName = "hierarchy";
pSolverSettings.HierarchyLevelCount = 3;
pSolverSettings.set_MaxValueForHierarchy(1,1);
pSolverSettings.set_NumTransitionToHierarchy(1,9);
pSolverSettings.set_MaxValueForHierarchy(2,2);
pSolverSettings.set_NumTransitionToHierarchy(2,9);
}
else
pSolverSettings.UseHierarchy=false;
// Do not forget to update the context after you set your impedance
pSolver.UpdateContext(pContext, GetDENetworkDataset(pContext.NetworkDataset),new GPMessagesClass());
}
