private INALayer CreateRouteAnalysisLayer(string sName, INetworkDataset pNetworkDataset)
{
INARouteSolver solver = new NARouteSolverClass();
INASolverSettings settings = solver as INASolverSettings;
INASolver solver2 = solver as INASolver;
solver.FindBestSequence = true;
solver.PreserveFirstStop = true;
solver.PreserveLastStop = false;
solver.UseTimeWindows = false;
solver.OutputLines = esriNAOutputLineType.esriNAOutputLineTrueShapeWithMeasure;
IStringArray restrictionAttributeNames = settings.RestrictionAttributeNames;
restrictionAttributeNames.Add("Oneway");
settings.RestrictionAttributeNames = restrictionAttributeNames;
IDatasetComponent component = pNetworkDataset as IDatasetComponent;
IDENetworkDataset dataElement = component.DataElement as IDENetworkDataset;
INAContext context = solver2.CreateContext(dataElement, sName);
(context as INAContextEdit).Bind(pNetworkDataset, new GPMessagesClass());
INALayer layer = solver2.CreateLayer(context);
(layer as ILayer).Name = sName;
return(layer);
}
/// <summary>
/// Create a new network analysis layer and set some solver settings
/// </summary>
private INALayer CreateRouteAnalysisLayer(String layerName, INetworkDataset networkDataset)
{
INARouteSolver naRouteSolver = new NARouteSolverClass();
INASolverSettings naSolverSettings = naRouteSolver as INASolverSettings;
INASolver naSolver = naRouteSolver as INASolver;
//Get the NetworkDataset's Data Element
IDatasetComponent datasetComponent = networkDataset as IDatasetComponent;
IDENetworkDataset deNetworkDataset = datasetComponent.DataElement as IDENetworkDataset;
//Create the NAContext and bind to it
INAContext naContext;
naContext = naSolver.CreateContext(deNetworkDataset, layerName);
INAContextEdit naContextEdit = naContext as INAContextEdit;
naContextEdit.Bind(networkDataset, new GPMessagesClass());
//Create the NALayer
INALayer naLayer;
naLayer = naSolver.CreateLayer(naContext);
(naLayer as ILayer).Name = layerName;
//Set properties on the route solver interface
naRouteSolver.FindBestSequence = true;
naRouteSolver.PreserveFirstStop = true;
naRouteSolver.PreserveLastStop = false;
naRouteSolver.UseTimeWindows = false;
naRouteSolver.OutputLines = esriNAOutputLineType.esriNAOutputLineTrueShapeWithMeasure;
//Set some properties on the general INASolverSettings interface
IStringArray restrictions = naSolverSettings.RestrictionAttributeNames;
restrictions.Add("Oneway");
naSolverSettings.RestrictionAttributeNames = restrictions;
// Update the context based on the changes made to the solver settings
naSolver.UpdateContext(naContext, deNetworkDataset, new GPMessagesClass());
//Return the layer
return(naLayer);
}
public INAContext CreateRouteSolverContext(INetworkDataset pNetDataset)
{
INAContextEdit pContextEdit;
IDENetworkDataset pDENDS= GetDENetworkDataset(pNetDataset);
INASolver pNASolver=(new NARouteSolverClass()) as INASolver;
pContextEdit = pNASolver.CreateContext(pDENDS, "Route") as INAContextEdit;
pContextEdit.Bind(pNetDataset,new GPMessagesClass());
return pContextEdit as INAContext;
}
public static INALayer CreateNetworkAnalysisLayer(string name, INetworkDataset networkDataset,
INASolver naSolver)
{
if (naSolver is INARouteSolver)
{
return(CreateRouteAnalysisLayer(name, networkDataset, naSolver as INARouteSolver));
}
if (naSolver is INAClosestFacilitySolver)
{
return(CreateClosestFacilityLayer(name, networkDataset, naSolver as INAClosestFacilitySolver));
}
IDatasetComponent component = (IDatasetComponent)networkDataset;
IDENetworkDataset dataElement = (IDENetworkDataset)component.DataElement;
INAContext context = naSolver.CreateContext(dataElement, name);
((INAContextEdit)context).Bind(networkDataset, null);
INALayer layer = naSolver.CreateLayer(context);
((ILayer)layer).Name = name;
return(layer);
}
public static INALayer CreateClosestFacilityLayer(string layerName, INetworkDataset networkDataset,
INAClosestFacilitySolver naClosesFacilitySolver)
{
INASolverSettings settings = naClosesFacilitySolver as INASolverSettings;
INASolver solver = naClosesFacilitySolver 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;
naClosesFacilitySolver.CreateTraversalResult = true;
naClosesFacilitySolver.TravelDirection = esriNATravelDirection.esriNATravelDirectionFromFacility;
naClosesFacilitySolver.OutputLines = esriNAOutputLineType.esriNAOutputLineTrueShapeWithMeasure;
IStringArray restrictionAttributeNames = settings.RestrictionAttributeNames;
restrictionAttributeNames.Add("Oneway");
settings.RestrictionAttributeNames = restrictionAttributeNames;
solver.UpdateContext(context, dataElement, new GPMessagesClass());
return(layer);
}
/// <summary>
/// 获取网络分析上下文，这个接口是网络分析中很重要的一个
/// </summary>
/// <param name="_pNaSolver"></param>
/// <param name="_pNetworkDataset"></param>
/// <returns></returns>
public INAContext GetSolverContext(INASolver _pNaSolver, INetworkDataset _pNetworkDataset)
{
//Get the Data Element
IDatasetComponent pDataComponent = _pNetworkDataset as IDatasetComponent;
IDEDataset pDeDataset = pDataComponent.DataElement;
INAContextEdit pContextEdit = _pNaSolver.CreateContext(pDeDataset as IDENetworkDataset, _pNaSolver.Name) as INAContextEdit;
//Prepare the context for analysis based upon the current network dataset schema.
pContextEdit.Bind(_pNetworkDataset, new GPMessagesClass());
return pContextEdit as INAContext;
}
