pathfinder.cs

开发的地信系统

            object[] segmentCost = new object[count];

            traceFlowSolver.FindPath(esriFlowMethod.esriFMConnected, esriShortestPathObjFn.esriSPObjFnMinMax, out _enumNetEID_Junctions, out _enumNetID_Edges, count, ref segmentCost);

            OptimalPath op = new OptimalPath(_enumNetEID_Junctions, _enumNetID_Edges, segmentCost);
            return op;


        }
        #endregion

        #region 静态成员方法
        /// <summary>
        /// 获得当前鼠标点击的点
        /// </summary>
        /// <returns></returns>
        public static IPoint GetCurrentPoint()
        {
            IRubberBand rubber;
            IPoint point;
            rubber = new RubberPointClass();
            //得到在地图上点中的点
            point = (IPoint)rubber.TrackNew(SystemFactory.MapControl.ActiveView.ScreenDisplay, null);
            return point;
        }

        /// <summary>
        /// 在地图上绘出经过与不经过的标志
        /// </summary>
        /// <param name="point"></param>
        /// <param name="flag">1表示经过的路口,2表示经过道路,3表示不经过的路口,4表示不经过的道路</param>
        public static void DrawNearestElement(IPoint point, int flag)
        {

            IScreenDisplay screenDisplay;
            screenDisplay = SystemFactory.MapControl.ActiveView.ScreenDisplay;

            IRgbColor rgbColor;
            rgbColor = new RgbColorClass();


            IGraphicsContainer container;
            IElement element;
            IGeometry selGeomerty = null;
            selGeomerty = (IGeometry)point;


            //将点中的点
            element = new MarkerElementClass();
            element.Geometry = point;

            IMarkerElement pointMarkElement;
            pointMarkElement = (IMarkerElement)element;

            //设置点的形状
            ISimpleMarkerSymbol pointMarkSymbol;
            pointMarkSymbol = (ISimpleMarkerSymbol)pointMarkElement.Symbol;
            switch (flag)
            {
                case 1:
                    rgbColor.Blue = 255;
                    pointMarkSymbol.Style = esriSimpleMarkerStyle.esriSMSCircle;
                    break;
                case 2:
                    rgbColor.Blue = 255;
                    pointMarkSymbol.Style = esriSimpleMarkerStyle.esriSMSCircle;
                    break;
                case 3:
                    rgbColor.Red = 255;
                    pointMarkSymbol.Style = esriSimpleMarkerStyle.esriSMSX;
                    break;
                case 4:
                    rgbColor.Red = 255;
                    pointMarkSymbol.Style = esriSimpleMarkerStyle.esriSMSX;
                    break;
                default:
                    break;
            }
            pointMarkSymbol.Color = rgbColor;
            pointMarkElement.Symbol = pointMarkSymbol;


            container = (IGraphicsContainer)SystemFactory.MapControl.Map;
            //container.UpdateElement((IElement)pointMarkElement);
            container.Reset();
            IElement elementTemp = container.Next();
            bool isExist = false;
            //element = (IElement)pointMarkElement;
            while (elementTemp != null)
            {
                if (elementTemp.Geometry.Envelope.XMax == point.Envelope.XMax
                    && elementTemp.Geometry.Envelope.YMax == point.Envelope.YMax)
                {
                    isExist = true;
                    break;
                }
                elementTemp = container.Next();

            }
            if (isExist == true)
            {
                container.DeleteElement(elementTemp);
                container.AddElement((IElement)pointMarkElement, 0);
            }

            else
                container.AddElement((IElement)pointMarkElement, 0);

            SystemFactory.MapControl.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
        }

        public static void ClearElement(IPoint point)
        {
            IGraphicsContainer container = (IGraphicsContainer)SystemFactory.MapControl.Map;
            container.Reset();
            IElement elementTemp = container.Next();
            while (elementTemp != null)
            {
                if (elementTemp.Geometry.Envelope.XMax == point.Envelope.XMax
                    && elementTemp.Geometry.Envelope.YMax == point.Envelope.YMax)
                {
                    container.DeleteElement(elementTemp);
                    break;
                }
                elementTemp = container.Next();

            }
            SystemFactory.MapControl.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);

        }

        public static void ClearElement(IEnvelope envelope)
        {
            IGraphicsContainer container = (IGraphicsContainer)SystemFactory.MapControl.Map;
            container.Reset();
            IElement elementTemp = container.Next();
            while (elementTemp != null)
            {
                if (elementTemp.Geometry.Envelope == envelope)
                {
                    container.DeleteElement(elementTemp);
                    break;
                }
                elementTemp = container.Next();

            }
            SystemFactory.MapControl.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);

        }

        /// <summary>
        /// 清除所有设置
        /// </summary>
        public static void ClearAllElements()
        {
            IGraphicsContainer container = (IGraphicsContainer)SystemFactory.MapControl.Map;
            container.DeleteAllElements();
            SystemFactory.MapControl.ActiveView.Refresh();
            //SystemFactory.MapControl.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
        }

        /// <summary>
        /// 清除不通过设置
        /// </summary>
        public static void ClearCantPassSet()
        {
            IGraphicsContainer container = (IGraphicsContainer)SystemFactory.MapControl.Map;
            container.Reset();
            IElement elementTemp = container.Next();

            //查找与不通过点style一致的点并删除之
            while (elementTemp != null)
            {
                IMarkerElement markerElement = elementTemp as IMarkerElement;
                if (markerElement == null)
                    continue;
                ISimpleMarkerSymbol symbol = markerElement.Symbol as ISimpleMarkerSymbol;
                if (symbol == null)
                    continue;
                if (symbol.Style == esriSimpleMarkerStyle.esriSMSX)
                {
                    container.DeleteElement(elementTemp);
                }

                elementTemp = container.Next();

            }
            SystemFactory.MapControl.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);

        }
        /// <summary>
        /// 清除必经设置
        /// </summary>
        public static void ClearMustPassSet()
        {
            IGraphicsContainer container = (IGraphicsContainer)SystemFactory.MapControl.Map;
            container.Reset();
            IElement elementTemp = container.Next();
            //查找与通过点style一致的点并删除之
            while (elementTemp != null)
            {
                IMarkerElement markerElement = elementTemp as IMarkerElement;
                if (markerElement == null)
                    continue;
                ISimpleMarkerSymbol symbol = markerElement.Symbol as ISimpleMarkerSymbol;
                if (symbol == null)
                    continue;
                if (symbol.Style == esriSimpleMarkerStyle.esriSMSCircle)
                {
                    container.DeleteElement(elementTemp);
                }

                elementTemp = container.Next();

            }
            SystemFactory.MapControl.ActiveView.Refresh();
        }

        /// <summary>
        /// 清除当前最佳路径
        /// </summary>
        /// <param name="PolyLine"></param>
        public static void ClearOptimalRouteResult()
        {

            IGraphicsContainer container = (IGraphicsContainer)SystemFactory.MapControl.Map;
            container.Reset();
            IElement elementTemp = container.Next();
            while (elementTemp != null)
            {
                if (elementTemp.Geometry.GeometryType == esriGeometryType.esriGeometryPolyline)
                    container.DeleteElement(elementTemp);
                elementTemp = container.Next();

            }
            SystemFactory.MapControl.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);

        }

        /// <summary>
        /// 根据图层名称获得地图中指定的图层对象引用
        /// </summary>
        /// <param name="strLayer"></param>
        /// <param name="map"></param>
        /// <returns></returns>
        public static IGeoFeatureLayer GetFeatureLayer(String strLayer, IMap map)
        {
            if (map == null)
            {
                return null;
            }

            ILayer pLayer;
            IGroupLayer pGroupLayer;
            IArray pVisibleLayersArray;
            IGeoFeatureLayer pGeoFeatureLayer;
            ICompositeLayer pCompositeLayer;

            pVisibleLayersArray = new ESRI.ArcGIS.esriSystem.Array();

            for (int i = 0; i < map.LayerCount; i++)
            {
                pLayer = map.get_Layer(i);
                pCompositeLayer = pLayer as ICompositeLayer;
                pGeoFeatureLayer = pLayer as IGeoFeatureLayer;
                if (pCompositeLayer != null)
                {
                    pGroupLayer = pLayer as IGroupLayer;
                    if ((pGroupLayer != null) && pGroupLayer.Visible)
                    {
                        for (int j = 0; j < pCompositeLayer.Count; j++)
                        {
                            pGeoFeatureLayer = pCompositeLayer.get_Layer(j) as IGeoFeatureLayer;
                            //System.Windows.Forms.MessageBox.Show(pGeoFeatureLayer.Name);
                            if ((pGeoFeatureLayer != null) && (strLayer.ToUpper() == pGeoFeatureLayer.Name.ToUpper()))
                            {
                                return pGeoFeatureLayer;
                            }
                        }

                    }
                }
                else if (pGeoFeatureLayer != null)
                {
                    if (pLayer.Visible)
                    {
                        if (strLayer.ToUpper() == pGeoFeatureLayer.Name.ToUpper())
                        {
                            return pGeoFeatureLayer;
                        }

                    }
                }
            }

            return null;

        }
  

        #endregion

    }
}