//查找最近某点最近的线
public static IFeature GetNearestFeature(IPoint pPoint)
{
try
{
double minDistince, Distiance;
IFeature pFeatureNearst, pFeature;
IProximityOperator pProximityOperator = pPoint as IProximityOperator;
IFeatureLayer pFeatureLayer = CDataImport.ImportFeatureLayerFromControltext(@"C:\Users\Administrator\Desktop\突发环境事件应急资源调度系统\data\road.shp");
IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;
IFeatureCursor pFeatureCursor = pFeatureClass.Search(null, false);
pFeature = pFeatureNearst = pFeatureCursor.NextFeature();
if (pFeature == null)
{
return(null);
}
minDistince = Distiance = pProximityOperator.ReturnDistance(pFeature.Shape as IGeometry);
pFeature = pFeatureCursor.NextFeature();
while (pFeature != null)
{
Distiance = pProximityOperator.ReturnDistance(pFeature.Shape as IGeometry);
if (minDistince > Distiance)
{
minDistince = Distiance;
pFeatureNearst = pFeature;
}
pFeature = pFeatureCursor.NextFeature();
}
System.GC.Collect();
System.GC.WaitForPendingFinalizers();
return(pFeatureNearst);
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString(), "异常");
return(null);
}
}
private void InitializationRoadNetwork(IFeatureLayer DepotLayer, IFeatureLayer DestLayer, List <RoadNetwork> pRoadNetwork)
{
IFeature pFeaturePoint = null;
IFeature pFeatureLine = null;
int PointObjectIndex, LineStartIndex, LineEndIndex, LineWeightIndex, LineNameIndex, LineObjectIndex;
string PointID, LineStartID, LineEndID, LineName, pLineID;
double Length;
Node pNode = null;
//初始化路径网络的结点信息
IFeatureLayer pFeatureLayerPoint = CDataImport.ImportFeatureLayerFromControltext(@"C:\Users\Administrator\Desktop\突发环境事件应急资源调度系统\data\point.shp");
IFeatureClass pFeatureClassPoint = pFeatureLayerPoint.FeatureClass;
IFeatureCursor pFeatureCursorPoint = pFeatureClassPoint.Search(null, false);
pFeaturePoint = pFeatureCursorPoint.NextFeature();
try
{
while (pFeaturePoint != null)
{
PointObjectIndex = pFeaturePoint.Fields.FindField("OBJECTID");
PointID = Convert.ToString(pFeaturePoint.get_Value(PointObjectIndex));
pNode = new Node(PointID);
NodeList.Add(pNode);
pFeaturePoint = pFeatureCursorPoint.NextFeature();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString(), "异常");
}
//初始化路径网络的路线信息
IFeatureLayer pFeatureLayerLine = CDataImport.ImportFeatureLayerFromControltext(@"C:\Users\Administrator\Desktop\突发环境事件应急资源调度系统\data\road.shp");
IFeatureClass pFeatureClassLine = pFeatureLayerLine.FeatureClass;
IFeatureCursor pFeatureCursorLine = pFeatureClassLine.Search(null, false);
pFeatureLine = pFeatureCursorLine.NextFeature();
try
{
while (pFeatureLine != null)
{
LineObjectIndex = pFeatureLine.Fields.FindField("OBJECTID");
LineStartIndex = pFeatureLine.Fields.FindField("StartNodeI");
LineEndIndex = pFeatureLine.Fields.FindField("EndNodeID");
LineWeightIndex = pFeatureLine.Fields.FindField("Minutes");
LineNameIndex = pFeatureLine.Fields.FindField("Name");
LineName = Convert.ToString(pFeatureLine.get_Value(LineNameIndex));
pLineID = Convert.ToString(pFeatureLine.get_Value(LineObjectIndex));
if (pRoadNetwork[Convert.ToInt32(pLineID) - 1].VehicleNumber != 0)
{
Length = (double)pFeatureLine.get_Value(LineWeightIndex) * pRoadNetwork[Convert.ToInt32(pLineID) - 1].VehicleNumber;
}
else
{
Length = (double)pFeatureLine.get_Value(LineWeightIndex);
}
for (int index = 0; index < 2; index++)
{
if (index == 0)
{
LineStartID = Convert.ToString(pFeatureLine.get_Value(LineStartIndex));
LineEndID = Convert.ToString(pFeatureLine.get_Value(LineEndIndex));
Edge pEdge = new Edge();
pEdge.StartNodeID = LineStartID;
pEdge.EndNodeID = LineEndID;
pEdge.Weight = Length;
pEdge.name = LineName;
pEdge.line = pFeatureLine.Shape as IPolyline;
pEdge.pLineID = pLineID;
NodeList[Convert.ToInt32(LineStartID) - 1].EdgeList.Add(pEdge);
}
else if (index == 1)
{
LineStartID = Convert.ToString(pFeatureLine.get_Value(LineEndIndex));
LineEndID = Convert.ToString(pFeatureLine.get_Value(LineStartIndex));
Edge pEdge = new Edge();
pEdge.StartNodeID = LineStartID;
pEdge.EndNodeID = LineEndID;
pEdge.Weight = Length;
pEdge.name = LineName;
pEdge.line = pFeatureLine.Shape as IPolyline;
pEdge.pLineID = pLineID;
NodeList[Convert.ToInt32(LineStartID) - 1].EdgeList.Add(pEdge);
}
}
pFeatureLine = pFeatureCursorLine.NextFeature();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString(), "异常");
}
//读取应急资源仓库信息
IFeature pFeatureDepot;
IFeatureLayer pFeatureLayerDepot = DepotLayer;
IFeatureClass pFeatureClassDepot = pFeatureLayerDepot.FeatureClass;
int DepotFeatureCount = pFeatureClassDepot.FeatureCount(null);
DepotName = new string[DepotFeatureCount];
DepotNodeID = new int[DepotFeatureCount];
int DepotCount = 0;
IFeatureCursor pFeatureCursorDepot = pFeatureClassDepot.Search(null, false);
pFeatureDepot = pFeatureCursorDepot.NextFeature();
int numbercount = 0;
while (pFeatureDepot != null)
{
IPoint depotpoint = pFeatureDepot.Shape as IPoint;
IPoint depotpointtemp = new PointClass();
IFeatureCursor pFeatureCursorpointTemp = pFeatureClassPoint.Search(null, false);
IFeature pFeaturepointTemp = pFeatureCursorpointTemp.NextFeature();
while (pFeaturepointTemp != null)
{
depotpointtemp = pFeaturepointTemp.Shape as IPoint;
if (depotpoint.X == depotpointtemp.X && depotpoint.Y == depotpointtemp.Y)
{
DepotNodeID[numbercount] = Convert.ToInt32(pFeaturepointTemp.get_Value(pFeaturepointTemp.Fields.FindField("OBJECTID")));
numbercount++;
}
pFeaturepointTemp = pFeatureCursorpointTemp.NextFeature();
}
DepotName[DepotCount] = Convert.ToString(pFeatureDepot.get_Value(pFeatureDepot.Fields.FindField("FID")));
DepotCount++;
IPoint pDepotpoint = pFeatureDepot.Shape as IPoint;
object O = Type.Missing;
DepotPoint.AddPoint(pDepotpoint, ref O, ref O);
pFeatureDepot = pFeatureCursorDepot.NextFeature();
}
//读取应急处置空间位置点数据
IFeature pFeatureDest;
IFeatureLayer pFeatureLayerDest = DestLayer;
IFeatureClass pFeatureClassDest = pFeatureLayerDest.FeatureClass;
int DestFeatureCount = pFeatureClassDest.FeatureCount(null);
DestName = new string[DestFeatureCount];
int DestCount = 0;
IFeatureCursor pFeatureCursorDest = pFeatureClassDest.Search(null, false);
pFeatureDest = pFeatureCursorDest.NextFeature();
while (pFeatureDest != null)
{
DestName[DestCount] = Convert.ToString(pFeatureDest.get_Value(pFeatureDest.Fields.FindField("FID")));
DestCount++;
IPoint pDestpoint = pFeatureDest.Shape as IPoint;
object O = Type.Missing;
DestPoint.AddPoint(pDestpoint, ref O, ref O);
pFeatureDest = pFeatureCursorDest.NextFeature();
}
}
//获取应急资源调度路线
public List <VehicleRouteResult> GetVehicleRoad(Collection <RouteNode> routeNodes, IPoint Depotpoint, IPoint Deptpoint)
{
try
{
List <VehicleRouteResult> pVehicleRouteResultList = new List <VehicleRouteResult>();
IFeatureLayer pFeatureLayerPoint = CDataImport.ImportFeatureLayerFromControltext(@"C:\Users\Administrator\Desktop\突发环境事件应急资源调度系统\data\point.shp");
IFeatureClass pFeatureClassPoint = pFeatureLayerPoint.FeatureClass;
object pObject = Type.Missing;
for (int i = 0; i < routeNodes.Count; i++)
{
VehicleRouteResult vehiclerouteresult = new VehicleRouteResult();
if (i == routeNodes.Count - 1)
{
break;
}
int StartID = Convert.ToInt32(routeNodes[i].NodeID);
string EndID = Convert.ToString(routeNodes[i + 1].NodeID);
//当路线的起点是应急资源仓库时，添加应急资源仓库为起点
if (i == 0)
{
vehiclerouteresult.Startpoint = Depotpoint;
}
//当路线的终点是应急处置空间位置时，添加应急处置空间位置为终点
if (i == routeNodes.Count - 2)
{
vehiclerouteresult.Endpoint = Deptpoint;
}
//添加线的结束点
IQueryFilter pQueryFilterEndNodeID = new QueryFilterClass();
pQueryFilterEndNodeID.WhereClause = "OBJECTID=" + "'" + Convert.ToString(EndID) + "'";
IFeatureCursor pFeatureCursorEndNodeID = pFeatureClassPoint.Search(pQueryFilterEndNodeID, false);
IFeature pFeatureEndNodeID = pFeatureCursorEndNodeID.NextFeature();
while (pFeatureEndNodeID != null)
{
vehiclerouteresult.Endpoint = pFeatureEndNodeID.Shape as IPoint;
pFeatureEndNodeID = pFeatureCursorEndNodeID.NextFeature();
}
//添加线的开始点
IQueryFilter pQueryFilterStartNodeID = new QueryFilterClass();
pQueryFilterStartNodeID.WhereClause = "OBJECTID=" + "'" + Convert.ToString(StartID) + "'";
IFeatureCursor pFeautreCursorStartNodeID = pFeatureClassPoint.Search(pQueryFilterStartNodeID, false);
IFeature pFeatureStartNodeID = pFeautreCursorStartNodeID.NextFeature();
while (pFeatureStartNodeID != null)
{
vehiclerouteresult.Startpoint = pFeatureStartNodeID.Shape as IPoint;
pFeatureStartNodeID = pFeautreCursorStartNodeID.NextFeature();
}
//添加路线
Node pNode = NodeList[StartID - 1];
for (int j = 0; j < pNode.EdgeList.Count; j++)
{
if (pNode.EdgeList[j].EndNodeID == EndID)
{
vehiclerouteresult.pLine = pNode.EdgeList[j].line;
vehiclerouteresult.pLineID = pNode.EdgeList[j].pLineID;
vehiclerouteresult.StartpointID = Convert.ToString(StartID);
vehiclerouteresult.EndpointID = Convert.ToString(EndID);
break;
}
}
pVehicleRouteResultList.Add(vehiclerouteresult);
}
return(pVehicleRouteResultList);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message + "\n" + ex.ToString(), "异常");
return(null);
}
}
private void InitializationRoadNetwork(List <RoadNetwork> pRoadNetwork)
{
IFeature pFeaturePoint = null;
IFeature pFeatureLine = null;
int PointObjectIndex, LineStartIndex, LineEndIndex, LineWeightIndex, LineNameIndex, LineObjectIndex;
string PointID, LineStartID, LineEndID, LineName, pLineID;
double Length;
Node pNode = null;
//初始化路径网络的结点信息
IFeatureLayer pFeatureLayerPoint = CDataImport.ImportFeatureLayerFromControltext(@"C:\Users\Administrator\Desktop\突发环境事件应急资源调度系统\data\point.shp");
IFeatureClass pFeatureClassPoint = pFeatureLayerPoint.FeatureClass;
IFeatureCursor pFeatureCursorPoint = pFeatureClassPoint.Search(null, false);
pFeaturePoint = pFeatureCursorPoint.NextFeature();
try
{
while (pFeaturePoint != null)
{
PointObjectIndex = pFeaturePoint.Fields.FindField("OBJECTID");
PointID = Convert.ToString(pFeaturePoint.get_Value(PointObjectIndex));
pNode = new Node(PointID);
NodeList.Add(pNode);
pFeaturePoint = pFeatureCursorPoint.NextFeature();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString(), "异常");
}
//初始化路径网络的路线信息
IFeatureLayer pFeatureLayerLine = CDataImport.ImportFeatureLayerFromControltext(@"C:\Users\Administrator\Desktop\突发环境事件应急资源调度系统\data\road.shp");
IFeatureClass pFeatureClassLine = pFeatureLayerLine.FeatureClass;
IFeatureCursor pFeatureCursorLine = pFeatureClassLine.Search(null, false);
pFeatureLine = pFeatureCursorLine.NextFeature();
try
{
while (pFeatureLine != null)
{
LineObjectIndex = pFeatureLine.Fields.FindField("OBJECTID");
LineStartIndex = pFeatureLine.Fields.FindField("StartNodeI");
LineEndIndex = pFeatureLine.Fields.FindField("EndNodeID");
LineWeightIndex = pFeatureLine.Fields.FindField("Minutes");
LineNameIndex = pFeatureLine.Fields.FindField("Name");
LineName = Convert.ToString(pFeatureLine.get_Value(LineNameIndex));
pLineID = Convert.ToString(pFeatureLine.get_Value(LineObjectIndex));
if (pRoadNetwork[Convert.ToInt32(pLineID) - 1].VehicleNumber != 0)
{
Length = (Convert.ToDouble(pFeatureLine.get_Value(LineWeightIndex))) * pRoadNetwork[Convert.ToInt32(pLineID) - 1].VehicleNumber;
}
else
{
Length = Convert.ToDouble(pFeatureLine.get_Value(LineWeightIndex));
}
for (int index = 0; index < 2; index++)
{
if (index == 0)
{
LineStartID = Convert.ToString(pFeatureLine.get_Value(LineStartIndex));
LineEndID = Convert.ToString(pFeatureLine.get_Value(LineEndIndex));
Edge pEdge = new Edge();
pEdge.StartNodeID = LineStartID;
pEdge.EndNodeID = LineEndID;
pEdge.Weight = Length;
pEdge.name = LineName;
pEdge.line = pFeatureLine.Shape as IPolyline;
pEdge.pLineID = pLineID;
NodeList[Convert.ToInt32(LineStartID) - 1].EdgeList.Add(pEdge);
}
else if (index == 1)
{
LineStartID = Convert.ToString(pFeatureLine.get_Value(LineEndIndex));
LineEndID = Convert.ToString(pFeatureLine.get_Value(LineStartIndex));
Edge pEdge = new Edge();
pEdge.StartNodeID = LineStartID;
pEdge.EndNodeID = LineEndID;
pEdge.Weight = Length;
pEdge.name = LineName;
pEdge.line = pFeatureLine.Shape as IPolyline;
pEdge.pLineID = pLineID;
NodeList[Convert.ToInt32(LineStartID) - 1].EdgeList.Add(pEdge);
}
}
pFeatureLine = pFeatureCursorLine.NextFeature();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message + "\n" + ex.ToString(), "异常");
}
}
