private void clearResultMenuItem_Click(object sender, EventArgs e)
{
axMapControl1.CurrentTool = null;//将地图空间的当前工具注销
try
{
string name = NetWorkAnalysClass.getPath(path) + "\\data\\HuanbaoGeodatabase.gdb";
//打开工作空间
IFeatureWorkspace pFWorkspace = NetWorkAnalysClass.OpenWorkspace(name) as IFeatureWorkspace;
IGraphicsContainer pGrap = this.axMapControl1.ActiveView as IGraphicsContainer;
pGrap.DeleteAllElements(); //删除所添加的图片要素
IFeatureClass inputFClass = pFWorkspace.OpenFeatureClass("Stops"); //站点要素
IFeatureClass barriesFClass = pFWorkspace.OpenFeatureClass("barries"); //障碍点要素
if (inputFClass.FeatureCount(null) > 0)
{
ITable pTable = barriesFClass as ITable;
pTable.DeleteSearchedRows(null);
}
for (int i = 0; i < axMapControl1.LayerCount; i++) //删除分析结果
{
ILayer pLayer = axMapControl1.get_Layer(i);
if (pLayer.Name == ShortPathSolveCommand.m_NAContext.Solver.DisplayName)
{
axMapControl1.DeleteLayer(i);
break;
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
this.axMapControl1.Refresh();
}
public override void OnMouseDown(int Button, int Shift, int X, int Y)
{
// TODO: Add AddNetStopsTool.OnMouseDown implementation
try
{
//根据人为用鼠标在地图上单击的点的坐标新建站点要素
IPoint pStopsPoint = new PointClass();
//将鼠标在屏幕上点击的一点的坐标转换为地图上的坐标，并赋给pStopsPoint
pStopsPoint = m_hookHelper.ActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(X, Y);
IFeature newPointFeature = inputFClass.CreateFeature();//创建新的障碍点要素
try
{
pStopsPoint.Z = 0;
newPointFeature.Shape = pStopsPoint; //将pStopsPoint赋给新要素的Shape属性
IZAware pZAware = pStopsPoint as IZAware; //Z值为高程
IMAware pMAware = pStopsPoint as IMAware; //M值是用来储存其他属性信息，如温度、浓度
pZAware.ZAware = true;
pMAware.MAware = true;
}
catch
{
IGeometry pGeo = pStopsPoint;
IZAware pZAware = pGeo as IZAware;
pZAware.ZAware = false;
newPointFeature.Shape = pGeo;
}
newPointFeature.Store();//储存新建的站点要素
//将站点图标添加到图层
IGraphicsContainer pGrap = m_hookHelper.ActiveView as IGraphicsContainer;
IColor pColor;
IRgbColor pRgbColor = new RgbColorClass();
pRgbColor.Red = 255;
pRgbColor.Green = 255;
pRgbColor.Blue = 255;
pColor = pRgbColor as IColor;
IPictureMarkerSymbol pms = new PictureMarkerSymbolClass();
pms.BitmapTransparencyColor = pColor;
string picturePath = NetWorkAnalysClass.getPath(path) + "\\data\\Img\\stops.bmp";
//添加自定义站点图片
pms.CreateMarkerSymbolFromFile(esriIPictureType.esriIPictureBitmap, picturePath);
pms.Size = 18;
IMarkerElement pMarkerEle = new MarkerElementClass();
pMarkerEle.Symbol = pms as IMarkerSymbol;
//将站点位置数据的空间参考设为与地图空间参考一致
pStopsPoint.SpatialReference = m_hookHelper.ActiveView.FocusMap.SpatialReference;
IElement pEle = pMarkerEle as IElement;
pEle.Geometry = pStopsPoint;
pGrap.AddElement(pEle, 1);
m_hookHelper.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
}
catch
{
MessageBox.Show("添加站点失败", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return;
}
}
/// <summary>
/// Occurs when this tool is clicked
/// </summary>
public override void OnClick()
{
string name = NetWorkAnalysClass.getPath(path) + "\\data\\HuanbaoGeodatabase.gdb";
//根据路径打开要素工作空间
pFWorkspace = NetWorkAnalysClass.OpenWorkspace(name) as IFeatureWorkspace;
//从工作空间里打开“Barries”要素类
barriesFClass = pFWorkspace.OpenFeatureClass("Barries");
//判断该要素类里是否含有要素，若有，则删除
if (barriesFClass.FeatureCount(null) > 0)
{
ITable pTable = barriesFClass as ITable;
pTable.DeleteSearchedRows(null);
}
}
/// <summary>
/// Occurs when this tool is clicked
/// </summary>
public override void OnClick()
{
// TODO: Add AddNetStopsTool.OnClick implementation
string name = NetWorkAnalysClass.getPath(path) + "\\data\\HuanbaoGeodatabase.gdb";
//根据路径打开要素工作空间
pFWorkspace = NetWorkAnalysClass.OpenWorkspace(name) as IFeatureWorkspace;
//从工作空间里打开“Stops”要素类
inputFClass = pFWorkspace.OpenFeatureClass("Stops");
//判断该要素类里是否含有要素，若有，则删除
if (inputFClass.FeatureCount(null) > 0)
{
ITable pTable = inputFClass as ITable;
pTable.DeleteSearchedRows(null);
}
}
//最短路径分析
private void routeSolverMenuItem_Click(object sender, EventArgs e)
{
ICommand pCommand;
pCommand = new ShortPathSolveCommand(); //新建自定义的“执行分析”命令
pCommand.OnCreate(axMapControl1.Object); //创建该命令
pCommand.OnClick(); //启动该命令
pCommand = null;
#region 道路详细信息
//获取最短路径的长度
string totalLengthOfRoute = "";
IFeatureLayer shortRouteLayer = NetWorkAnalysClass.GetLayerByName(
m_mapControl.Map, "Routes") as IFeatureLayer;
IFeatureCursor featureCursor = shortRouteLayer.Search(null, false);
IFeature featue = featureCursor.NextFeature();
for (int i = 0; i < featue.Fields.FieldCount; i++)
{
if (featue.Fields.get_Field(i).Name == "Total_Shape_Length")
{
totalLengthOfRoute = featue.get_Value(i).ToString();
}
}
//获取与最短路径有关的道路的名字
FormQueryBySpatial formQueryBySpatial = new FormQueryBySpatial();
ArrayList containRouteNameList = formQueryBySpatial.selectRouteNameBySpatial(
esriSpatialRelEnum.esriSpatialRelContains, m_mapControl.Map);
ArrayList overlapRouteNameList = formQueryBySpatial.selectRouteNameBySpatial(
esriSpatialRelEnum.esriSpatialRelOverlaps, m_mapControl.Map);
m_mapControl.Map.ClearSelection();
string output = "经过道路有：";
for (int i = 0; i < containRouteNameList.Count; i++)
{
output += containRouteNameList[i].ToString() + ",";
}
output = output.Substring(0, output.Length - 1);
output += "\n" + "站点所在道路为：";
for (int i = 0; i < overlapRouteNameList.Count; i++)
{
output += overlapRouteNameList[i].ToString() + ",";
}
output = output.Substring(0, output.Length - 1);
output = output + "\n" + "路径长度：" + totalLengthOfRoute + "米";
MessageBox.Show(output);
#endregion
}
/// <summary>
/// Occurs when this command is clicked
/// </summary>
public override void OnClick()
{
string name = NetWorkAnalysClass.getPath(path) + "\\data\\HuanbaoGeodatabase.gdb"; //得到数据库文件路径
IFeatureWorkspace pFWorkspace = NetWorkAnalysClass.OpenWorkspace(name) as IFeatureWorkspace; //打开要素工作空间
//"RouteNetwork","BaseData"参数不可更改
networkDataset = NetWorkAnalysClass.OpenPathNetworkDataset(pFWorkspace as IWorkspace,
"RouteNetwork", "BaseData"); //打开网络数据集
m_NAContext = NetWorkAnalysClass.CreatePathSolverContext(networkDataset); //通过网络数据集创建网络分析上下文
inputFClass = pFWorkspace.OpenFeatureClass("Stops"); //根据名字打开站点要素类
barriesFClass = pFWorkspace.OpenFeatureClass("Barries"); //根据名字打开障碍点要素类
if (IFLayerExist("NetworkDataset") == false) //若不存在NetworkDataset图层就执行
{
//创建名为“NetworkDataset”的图层
ILayer layer;
INetworkLayer networkLayer;
networkLayer = new NetworkLayerClass();
networkLayer.NetworkDataset = networkDataset;
layer = networkLayer as ILayer;
layer.Name = "NetworkDataset";
m_hookHelper.ActiveView.FocusMap.AddLayer(layer);
layer.Visible = false;
}
//检查是否存在名为“Route”的图层。若存在则删除
if (IFLayerExist(m_NAContext.Solver.DisplayName) == true)
{
for (int i = 0; i < m_hookHelper.FocusMap.LayerCount; i++)
{
if (m_hookHelper.FocusMap.get_Layer(i).Name == m_NAContext.Solver.DisplayName)
{
m_hookHelper.FocusMap.DeleteLayer(m_hookHelper.FocusMap.get_Layer(i));
}
}
}
INALayer naLayer = m_NAContext.Solver.CreateLayer(m_NAContext);
ILayer pLayer = naLayer as ILayer;
pLayer.Name = m_NAContext.Solver.DisplayName;
m_hookHelper.ActiveView.FocusMap.AddLayer(pLayer);//往当前地图中添加该图层
int featureCount = inputFClass.FeatureCount(null); //得到站点要素类中要素的个数
if (featureCount < 2) //若少于两个则不能进行分析
{
MessageBox.Show("只有一个站点，不能进行路径分析！");
return;
}
IGPMessages gpMessages = new GPMessagesClass();//定义一个地理处理结果信息返回对象
//加载站点要素，并设置容差
NetWorkAnalysClass.LoadNANetworkLocations("Stops", inputFClass, m_NAContext, 80);
//加载障碍点要素，并设置容差
NetWorkAnalysClass.LoadNANetworkLocations("Barriers", barriesFClass, m_NAContext, 50);
INASolver naSolver = m_NAContext.Solver;//创建网络分析对象
try
{
naSolver.Solve(m_NAContext, gpMessages, null);//执行最短路径分析
}
catch (Exception ex)
{
MessageBox.Show("未能找到有效路径" + ex.Message, "提示",
MessageBoxButtons.OKCancel, MessageBoxIcon.Warning);
return;
}
//将“Routes”图层组下的“Stops”、“Point Barriers”图层设为不可见
for (int i = 0; i < m_hookHelper.FocusMap.LayerCount; i++)
{
if (m_hookHelper.FocusMap.get_Layer(i).Name == m_NAContext.Solver.DisplayName)
{
//ICompositeLayer Interface Provides access to members that work with a collection of layers that behaves like a single layer.
//CompositeLayer为图层组类型
ICompositeLayer pCompositeLayer = m_hookHelper.FocusMap.get_Layer(i) as ICompositeLayer;
for (int t = 0; t < pCompositeLayer.Count; t++)
{
ILayer pResultLayer = pCompositeLayer.get_Layer(t);
if (pResultLayer.Name == "Stops" || pResultLayer.Name == "Point Barriers")
{
pResultLayer.Visible = false;
continue;
}
}
}
}
//接下来将地图的视图范围缩放至最短路径的显示范围
IGeoDataset geoDataset; //地理数据集
IEnvelope envelope; //最小边界矩形
geoDataset = m_NAContext.NAClasses.get_ItemByName("Routes") as IGeoDataset;
//The IGeoDataset::Extent property returns an envelope representing the maximum extent of data which has been stored in the dataset.
envelope = geoDataset.Extent;
if (!envelope.IsEmpty)
{
envelope.Expand(1.1, 1.1, true);
}
//将地图的显示的范围设置为“Routes”图层的数据范围
m_hookHelper.ActiveView.Extent = envelope;
//刷新视图
m_hookHelper.ActiveView.Refresh();
//获取最短路径“Routes”要素
ITable table = m_NAContext.NAClasses.get_ItemByName("Routes") as ITable;
ICursor cursor = table.Search(null, false);
IRow row = cursor.NextRow();
for (int i = 0; i < table.Fields.FieldCount; i++)
{
if (table.Fields.get_Field(i).AliasName == "Total_Shape_Length")
{
//获取最短路径的总长度
total_Length_str = row.get_Value(i).ToString();
}
}
}