在现实生活中gis者开发的时候难免需要用到网络分析的功能，为了更好节省时间，加快开发的效率。故在此共享当时AE开发所用的网络分析的源码。愿对你有所帮助。
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using ESRI.ArcGIS.Catalog; using ESRI.ArcGIS.CatalogUI; using ESRI.ArcGIS.Geodatabase; using ESRI.ArcGIS.DataSourcesGDB; using ESRI.ArcGIS.Carto; using ESRI.ArcGIS.Geometry; using ESRI.ArcGIS.NetworkAnalysis; using ESRI.ArcGIS.NetworkAnalyst; using ESRI.ArcGIS.Display; using System.IO; namespace exp { public partial class network : Form { private INAContext m_NAContext;//网络分析上下文 private INetworkDataset networkDataset;//网络数据集 private IFeatureWorkspace pFWorkspace; private IFeatureClass inputFClass;//打开stops数据集 private IFeatureDataset featureDataset; private bool networkanalasia = false;//判断是否点击新路线按钮，进入添加起点阶段 private int clickedcount = 0;//mapcontrol加点显示点数 private IActiveView m_ipActiveView; private IGraphicsContainer PGC; private IMap m_ipMap; public network() { InitializeComponent(); } private void initialize() { axMapControl1.ActiveView.Clear(); axMapControl1.ActiveView.Refresh(); //获取当前应用程序的目录名称 string path = System.AppDomain.CurrentDomain.SetupInformation.ApplicationBase; int t; for (t = 0; t < path.Length; t++) { if (path.Substring(t, 14) == "NetworkAnalasis") { break; } } //根据目录名称获取数据存取路径 string name = path.Substring(0, t - 1) + "\\TestData\\Test.gdb"; //打开工作空间 pFWorkspace = OpenWorkspace(name) as IFeatureWorkspace; //打开网络数据集 networkDataset = OpenNetworkDataset(pFWorkspace as IWorkspace, "street_ND", "test"); //创建网络分析上下文，建立一种解决关系 m_NAContext = CreateSolverContext(networkDataset); //打开数据集 inputFClass = pFWorkspace.OpenFeatureClass("stops"); //TEST_ND_JUNCTIONS图层 IFeatureLayer vertex = new FeatureLayerClass(); vertex.FeatureClass = pFWorkspace.OpenFeatureClass("Test_ND_Junctions"); vertex.Name = vertex.FeatureClass.AliasName; axMapControl1.AddLayer(vertex,0); //street图层 IFeatureLayer road3; road3 = new FeatureLayerClass(); road3.FeatureClass = pFWorkspace.OpenFeatureClass("street"); road3.Name = road3.FeatureClass.AliasName; axMapControl1.AddLayer(road3, 0); //为networkdataset生成一个图层，并将该图层添加到axmapcontrol中 ILayer pLayer;//网络图层 INetworkLayer pNetworkLayer; pNetworkLayer = new NetworkLayerClass(); pNetworkLayer.NetworkDataset = networkDataset; pLayer = pNetworkLayer as ILayer; pLayer.Name = "Network Dataset"; axMapControl1.AddLayer(pLayer, 0); //生成一个网络分析图层并添加到axmaptrol1中 ILayer layer1; INALayer nalayer = m_NAContext.Solver.CreateLayer(m_NAContext); layer1 = nalayer as ILayer; layer1.Name = m_NAContext.Solver.DisplayName; axMapControl1.AddLayer(layer1, 0); m_ipActiveView = axMapControl1.ActiveView; m_ipMap = m_ipActiveView.FocusMap; PGC = m_ipMap as IGraphicsContainer; } //打开工作空间 public IWorkspace OpenWorkspace(string strGDBName) { IWorkspaceFactory workspaceFactory; workspaceFactory = new FileGDBWorkspaceFactoryClass(); return workspaceFactory.OpenFromFile(strGDBName, 0); } //打开网络数据集 public INetworkDataset OpenNetworkDataset(IWorkspace networkDatasetWorkspace, System.String networkDatasetName, System.String featureDatasetName) { if (networkDatasetWorkspace == null || networkDatasetName == "" || featureDatasetName == null) { return null; } IDatasetContainer3 datasetContainer3 = null; IFeatureWorkspace featureWorkspace = networkDatasetWorkspace as IFeatureWorkspace; featureDataset = featureWorkspace.OpenFeatureDataset(featureDatasetName); IFeatureDatasetExtensionContainer featureDatasetExtensionContainer = featureDataset as IFeatureDatasetExtensionContainer; IFeatureDatasetExtension featureDatasetExtension = featureDatasetExtensionContainer.FindExtension(esriDatasetType.esriDTNetworkDataset); datasetContainer3 = featureDatasetExtensionContainer as IDatasetContainer3; if (datasetContainer3 == null) return null; IDataset dataset = datasetContainer3.get_DatasetByName(esriDatasetType.esriDTNetworkDataset, networkDatasetName); return dataset as INetworkDataset; } //创建网络分析上下文 public INAContext CreateSolverContext(INetworkDataset networkDataset) { //获取创建网络分析上下文所需的IDENETWORKDATASET类型参数 IDENetworkDataset deNDS = GetDENetworkDataset(networkDataset); INASolver naSolver; naSolver = new NARouteSolver(); INAContextEdit contextEdit = naSolver.CreateContext(deNDS, naSolver.Name) as INAContextEdit; contextEdit.Bind(networkDataset, new GPMessagesClass()); return contextEdit as INAContext; return contextEdit as INAContext; } //得到创建网络分析上下文所需的IDENETWORKDATASET类型参数 public IDENetworkDataset GetDENetworkDataset(INetworkDataset networkDataset) { //将网络分析数据集QI添加到DATASETCOMPOENT IDatasetComponent dstComponent; dstComponent = networkDataset as IDatasetComponent; //获得数据元素 return dstComponent.DataElement as IDENetworkDataset; } private void axMapControl1_OnMouseDown(object sender, ESRI.ArcGIS.Controls.IMapControlEvents2_OnMouseDownEvent e) { if (networkanalasia == true) { IPointCollection m_ipPoints;//输入点集合 IPoint ipNew; m_ipPoints = new MultipointClass(); ipNew = axMapControl1.ActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(e.x, e.y); object o = Type.Missing; m_ipPoints.AddPoint(ipNew, ref o, ref o); CreateFeature(inputFClass, m_ipPoints);//或者用鼠标点击最近点 //把最近的点显示出来 IElement element; ITextElement textelement = new TextElementClass(); element = textelement as IElement; ITextSymbol textSymbol = new TextSymbol(); textelement.Symbol = textSymbol; clickedcount++; textelement.Text = clickedcount.ToString(); element.Geometry = m_ipActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(e.x, e.y); PGC.AddElement(element, 0); m_ipActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null); } } //获取距离鼠标点击最近的点 public void CreateFeature(IFeatureClass featureClass, IPointCollection PointCollection) { //是否为点图层 if (featureClass.ShapeType != esriGeometryType.esriGeometryPoint) { return; } //创建点要素 for (int i = 0; i < PointCollection.PointCount; i++) { IFeature feature = featureClass.CreateFeature(); feature.Shape = PointCollection.get_Point(i); IRowSubtypes rowSubtypes = (IRowSubtypes)feature; feature.Store(); } } private void axMapControl1_OnDoubleClick(object sender, ESRI.ArcGIS.Controls.IMapControlEvents2_OnDoubleClickEvent e) { } private void toolStripSplitButton1_ButtonClick(object sender, EventArgs e) { networkanalasia = true; axMapControl1.CurrentTool = null; ITable pTable = inputFClass as ITable; pTable.DeleteSearchedRows(null); //提取路径前，删除上一次路径route网络上下文 IFeatureClass routesFC; routesFC=m_NAContext.NAClasses.get_ItemByName("Routes") as IFeatureClass; ITable pTable1 = routesFC as ITable; pTable1.DeleteSearchedRows(null); //提取路径前，删除上一次路径Stops网络上下文 INAClass stopsNAClass = m_NAContext.NAClasses.get_ItemByName("Stops") as INAClass; ITable ptable2=stopsNAClass as ITable; ptable2.DeleteSearchedRows(null); //提取路径前，删除上一次barries网络上下文 INAClass barriesNAClass = m_NAContext.NAClasses.get_ItemByName("Barriers") as INAClass; ITable pTable3 = barriesNAClass as ITable; pTable3.DeleteSearchedRows(null); //提取路径前，删除上次路径polyline IFeatureClass getroute = pFWorkspace.OpenFeatureClass("get_route"); ITable ptable_polyline = getroute as ITable; ptable_polyline.DeleteSearchedRows(null); PGC.DeleteAllElements(); clickedcount = 0; axMapControl1.Refresh(); } private void toolStripSplitButton2_ButtonClick(object sender, EventArgs e) { IGPMessages gpMessages = new GPMessagesClass(); loadNANetworkLocations("Stops", inputFClass, 80); INASolver naSlover = m_NAContext.Solver; naSlover.Solve(m_NAContext, gpMessages, null); //解决完后，删除图层内容 ITable pTable_inputFClass = inputFClass as ITable; pTable_inputFClass.DeleteSearchedRows(null); axMapControl1.Refresh(); } public void loadNANetworkLocations(string strNAClassName,IFeatureClass inputFC,double snapTolerance) { INAClass naClass; INamedSet classes; classes =m_NAContext.NAClasses; naClass=classes.get_ItemByName(strNAClassName) as INAClass; //删除naClasses中添加的项 naClass.DeleteAllRows(); //加载网络分析对象，设置容差值 INAClassLoader classLoader=new NAClassLoader(); classLoader.Locator=m_NAContext.Locator; if (snapTolerance>0)classLoader.Locator.SnapTolerance=snapTolerance; classLoader.NAClass=naClass; //创建INAclassFieldMap,用于字段映射 INAClassFieldMap fieldMap; fieldMap=new NAClassFieldMap(); //加载网络分析类 int rowsln=0; int rowsLocated=0; IFeatureCursor featureCursor=inputFC.Search(null,true); classLoader.Load((ICursor)featureCursor,null,ref rowsln,ref rowsLocated); ((INAContextEdit)m_NAContext).ContextChanged(); } } }说明：源码来源于某本书，但是我不太记得某本书的名字了。代码是自己手打的，如果有错误请进行纠正。
