private async void UpdateIntersections()
        {
            try
            {
                Logging.LogMethodCall(ClassName);
                var qf        = new QueryParameters();
                var gemStreet = GeometryEngine.Union(_selectedStreet.Value);
                qf.Geometry            = gemStreet;
                qf.SpatialRelationship = SpatialRelationship.Touches;
                var results = await FeatureSource.QueryFeaturesAsync(qf);

                Intersections.Clear();
                foreach (var result in results)
                {
                    var streetName = result.Attributes[StreetNameField].ToString();
                    if (SelectedStreet.Key == streetName)
                    {
                        continue;
                    }
                    var loc = GeometryEngine.Intersections(result.Geometry, gemStreet);
                    if (loc[0] is MapPoint)
                    {
                        Intersections.Add(new Tuple <string, Geometry>(streetName, loc[0]));
                    }
                    else if (loc[0] is Multipoint)
                    {
                        Intersections.Add(new Tuple <String, Geometry>(streetName, ((Multipoint)loc[0]).Points[0]));
                    }
                    else if (loc[0] is Multipart)
                    {
                        var geom = ((Multipart)loc[0]).Parts[0].Points[0];
                        Intersections.Add(new Tuple <string, Geometry>(streetName, geom));
                    }
                }
            }
            catch (Exception ex)
            {
                var message = "Error updating intersections";
                ErrorHelper.OnError(MethodBase.GetCurrentMethod().DeclaringType.Name, message, ex);
                Logging.LogMessage(Logging.LogType.Error, message, ex);
            }
        }
Example #2
0
        // myMapView 事件
        private async void MyMapView_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            IInputElement ie  = (IInputElement)(sender);
            MapPoint      loc = myMapView.ScreenToLocation(e.GetPosition(ie));

            switch (operation)
            {
            case OperateType.DrawPoint:     //画点
                Graphic pt = new Graphic(loc, pointSymbol);
                graphicsLayer.Graphics.Add(pt);
                break;

            case OperateType.DrawPolyline:    //画线
                pointCollection.Add(loc);
                if (pointCollection.Count >= 2)
                {
                    if (pointCollection.Count > 2)
                    {
                        Graphic         g  = graphicsLayer.Graphics[graphicsLayer.Graphics.Count - 1];
                        PolylineBuilder lb = new PolylineBuilder(pointCollection);
                        g.Geometry = lb.ToGeometry();
                    }
                    else
                    {
                        Esri.ArcGISRuntime.Geometry.Polyline l = new Esri.ArcGISRuntime.Geometry.Polyline(pointCollection);
                        Graphic lg = new Graphic(l, lineSymbol);
                        graphicsLayer.Graphics.Add(lg);
                    }
                }
                break;

            case OperateType.DrawPolygon:    //画多边形
                pointCollection.Add(loc);
                if (pointCollection.Count >= 3)
                {
                    if (pointCollection.Count > 3)
                    {
                        Graphic        g  = graphicsLayer.Graphics[graphicsLayer.Graphics.Count - 1];
                        PolygonBuilder pb = new PolygonBuilder(pointCollection);
                        g.Geometry = pb.ToGeometry();
                    }
                    else
                    {
                        Esri.ArcGISRuntime.Geometry.Polygon p = new Esri.ArcGISRuntime.Geometry.Polygon(pointCollection);
                        Graphic pg = new Graphic(p, fillSymbol);
                        graphicsLayer.Graphics.Add(pg);
                    }
                }
                break;

            case OperateType.None:    //缺省状态
                graphicsLayer.ClearSelection();
                IdentifyGraphicsOverlayResult result = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);

                //选择图形元素
                if (result.Graphics.Count < 1)
                {
                    curSelGraphic = null;
                    EditVertexMenuItem.IsEnabled   = false;
                    UneditVertexMenuItem.IsEnabled = false;
                    return;
                }
                curSelGraphic                = result.Graphics.First();
                curSelGraphic.IsSelected     = true;
                EditVertexMenuItem.IsEnabled = true;
                break;

            case OperateType.Cal_Clip:     //选择图形
                IdentifyGraphicsOverlayResult gResult = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);

                if (gResult.Graphics.Count < 1)
                {
                    return;
                }
                Graphic selGraphic = gResult.Graphics.First();
                selGraphic.IsSelected = true; listOfClipGraphics.Add(selGraphic); //记录所选图形
                if (listOfClipGraphics.Count == 2)                                //图形数目为2时,进行剪切计算
                {
                    Graphic g1 = listOfClipGraphics[0];
                    Graphic g2 = listOfClipGraphics[1];
                    if (g1.Geometry.GeometryType != GeometryType.Polygon || g2.Geometry.GeometryType != GeometryType.Polygon)     //如果所选图形不是多边形,则退出
                    {
                        MessageBox.Show("请选择两个多边形图形!");
                        listOfClipGraphics.Clear();
                        graphicsLayer.ClearSelection();
                        return;
                    }
                    Esri.ArcGISRuntime.Geometry.Geometry resultGeometry = GeometryEngine.Clip(g1.Geometry, g2.Geometry.Extent); //执行剪切操作
                    if (resultGeometry != null)                                                                                 //处理结果
                    {
                        graphicsLayer.Graphics.Remove(g1);                                                                      //从图形层中移除原图形
                        graphicsLayer.Graphics.Remove(g2);
                        Graphic clipedGraphic = new Graphic(resultGeometry, fillSymbol);                                        //利 用剪切结果构建新的图形
                        graphicsLayer.Graphics.Add(clipedGraphic); operation = OperateType.None;
                    }
                    listOfClipGraphics.Clear();     //清空图形选择集合
                    graphicsLayer.ClearSelection(); //清空图形层所选
                }
                break;

            case OperateType.Cal_Union:     // 联合
                IdentifyGraphicsOverlayResult gResultUnion = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);

                if (gResultUnion.Graphics.Count < 1)
                {
                    return;
                }
                Graphic selGraphicUnion = gResultUnion.Graphics.First();
                selGraphicUnion.IsSelected = true;
                listOfClipGraphics.Add(selGraphicUnion); //记录所选图形
                if (listOfClipGraphics.Count == 2)       //图形数目为2时,进行剪切计算
                {
                    Graphic g1 = listOfClipGraphics[0];
                    Graphic g2 = listOfClipGraphics[1];
                    if (g1.Geometry.GeometryType != GeometryType.Polygon || g2.Geometry.GeometryType != GeometryType.Polygon)     //如果所选图形不是多边形,则退出
                    {
                        MessageBox.Show("请选择两个多边形图形!");
                        listOfClipGraphics.Clear();
                        graphicsLayer.ClearSelection();
                        return;
                    }
                    Esri.ArcGISRuntime.Geometry.Geometry resultGeometry = GeometryEngine.Union(g1.Geometry, g2.Geometry.Extent); //执行剪切操作
                    if (resultGeometry != null)                                                                                  //处理结果
                    {
                        graphicsLayer.Graphics.Remove(g1);                                                                       //从图形层中移除原图形
                        graphicsLayer.Graphics.Remove(g2);
                        Graphic clipedGraphic = new Graphic(resultGeometry, fillSymbol);                                         //利 用剪切结果构建新的图形
                        graphicsLayer.Graphics.Add(clipedGraphic);
                        operation = OperateType.None;
                    }
                    listOfClipGraphics.Clear();     //清空图形选择集合
                    graphicsLayer.ClearSelection(); //清空图形层所选
                }
                break;

            case OperateType.Cal_Cut:     // 剪切
                IdentifyGraphicsOverlayResult gResult_Cut = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);

                if (gResult_Cut.Graphics.Count < 1)
                {
                    return;
                }
                Graphic selGraphic_Cut = gResult_Cut.Graphics.First();
                selGraphic_Cut.IsSelected = true;
                listOfClipGraphics.Add(selGraphic_Cut); //记录所选图形
                if (listOfClipGraphics.Count == 2)      //图形数目为1时,进行剪切计算
                {
                    Graphic g1 = listOfClipGraphics[0];
                    Graphic g2 = listOfClipGraphics[1];
                    if (g1.Geometry.GeometryType != GeometryType.Polygon || g2.Geometry.GeometryType != GeometryType.Polyline)     //如果所选图形不是多边形,则退出
                    {
                        MessageBox.Show("请先选择一个面要素后再选择一个线要素.");
                        listOfClipGraphics.Clear();
                        graphicsLayer.ClearSelection();
                        return;
                    }
                    Esri.ArcGISRuntime.Geometry.Polyline   polyLine       = (Esri.ArcGISRuntime.Geometry.Polyline)g2.Geometry;
                    Esri.ArcGISRuntime.Geometry.Geometry[] resultGeometry = GeometryEngine.Cut(g1.Geometry, polyLine); //执行剪切操作
                    if (resultGeometry != null)                                                                        //处理结果
                    {
                        graphicsLayer.Graphics.Remove(g1);
                        for (int z = 0; z < resultGeometry.Length; z++)
                        {
                            Graphic clipedGraphic = new Graphic(resultGeometry[z], fillSymbol);     //利 用剪切结果构建新的图形
                            graphicsLayer.Graphics.Add(clipedGraphic);
                        }
                        operation = OperateType.None;
                    }
                    listOfClipGraphics.Clear();     //清空图形选择集合
                    graphicsLayer.ClearSelection(); //清空图形层所选
                }
                break;

            case OperateType.Cal_Simplify:     // 拓扑纠正
                IdentifyGraphicsOverlayResult gResult_Simplify = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);

                if (gResult_Simplify.Graphics.Count < 1)
                {
                    return;
                }
                Graphic selGraphic_Simplify = gResult_Simplify.Graphics.First();
                selGraphic_Simplify.IsSelected = true;
                listOfClipGraphics.Add(selGraphic_Simplify); //记录所选图形
                if (listOfClipGraphics.Count == 1)           //图形数目为1时,进行剪切计算
                {
                    Graphic g1 = listOfClipGraphics[0];
                    if (g1.Geometry.GeometryType == GeometryType.Point)     //如果所选图形不是多边形,则退出
                    {
                        MessageBox.Show("请先选择一个面要素或线要素.");
                        listOfClipGraphics.Clear();
                        graphicsLayer.ClearSelection();
                        return;
                    }
                    Esri.ArcGISRuntime.Geometry.Geometry resultGeometry = GeometryEngine.Simplify(g1.Geometry); //执行剪切操作
                    if (resultGeometry != null)                                                                 //处理结果
                    {
                        graphicsLayer.Graphics.Remove(g1);                                                      //从图形层中移除原图形
                        Graphic clipedGraphic = new Graphic(resultGeometry, fillSymbol);                        //利 用剪切结果构建新的图形
                        graphicsLayer.Graphics.Add(clipedGraphic);
                        operation = OperateType.None;
                    }
                    listOfClipGraphics.Clear();     //清空图形选择集合
                    graphicsLayer.ClearSelection(); //清空图形层所选
                }
                break;

            case OperateType.Cal_Gene:     // 简化
                IdentifyGraphicsOverlayResult gResult_Gene = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);

                if (gResult_Gene.Graphics.Count < 1)
                {
                    return;
                }
                Graphic selGraphic_Gene = gResult_Gene.Graphics.First();
                selGraphic_Gene.IsSelected = true;
                listOfClipGraphics.Add(selGraphic_Gene); //记录所选图形
                if (listOfClipGraphics.Count == 1)       //图形数目为1时
                {
                    Graphic g1 = listOfClipGraphics[0];
                    if (g1.Geometry.GeometryType == GeometryType.Point)     //如果所选图形是点,则退出
                    {
                        MessageBox.Show("请先选择一个面要素或线要素.");
                        listOfClipGraphics.Clear();
                        graphicsLayer.ClearSelection();
                        return;
                    }
                    Esri.ArcGISRuntime.Geometry.Geometry resultGeometry = GeometryEngine.Generalize(g1.Geometry, 1000000.0, true); //执行剪切操作
                    if (resultGeometry != null)                                                                                    //处理结果
                    {
                        MessageBox.Show(resultGeometry.ToJson() + "\n" + resultGeometry.GeometryType);
                        graphicsLayer.Graphics.Remove(g1);                               //从图形层中移除原图形
                        Graphic clipedGraphic = new Graphic(resultGeometry, fillSymbol); //利 用剪切结果构建新的图形
                        graphicsLayer.Graphics.Add(clipedGraphic);
                        operation = OperateType.None;
                    }
                    listOfClipGraphics.Clear();     //清空图形选择集合
                    graphicsLayer.ClearSelection(); //清空图形层所选
                }
                break;

            case OperateType.Cal_Buff:     // 缓冲
                IdentifyGraphicsOverlayResult gResult_Buff = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);

                if (gResult_Buff.Graphics.Count < 1)
                {
                    return;
                }
                Graphic selGraphic_Buff = gResult_Buff.Graphics.First();
                selGraphic_Buff.IsSelected = true;
                listOfClipGraphics.Add(selGraphic_Buff); //记录所选图形
                if (listOfClipGraphics.Count == 1)       //图形数目为1时,进行剪切计算
                {
                    Graphic g1 = listOfClipGraphics[0];
                    Esri.ArcGISRuntime.Geometry.Geometry resultGeometry = GeometryEngine.Buffer(g1.Geometry, 1000000.0);                                                                                                                           //执行剪切操作
                    if (resultGeometry != null)                                                                                                                                                                                                    //处理结果
                    {
                        graphicsLayer.Graphics.Remove(g1);                                                                                                                                                                                         //从图形层中移除原图形
                        Graphic clipedGraphic = new Graphic(resultGeometry, new SimpleFillSymbol(SimpleFillSymbolStyle.Solid, Color.FromArgb(125, 255, 250, 0), new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, Color.FromArgb(0, 0, 0), 4.0))); //利 用剪切结果构建新的图形
                        graphicsLayer.Graphics.Add(clipedGraphic);
                        operation = OperateType.None;
                    }
                    listOfClipGraphics.Clear();     //清空图形选择集合
                    graphicsLayer.ClearSelection(); //清空图形层所选
                }
                break;

            case OperateType.Cal_Jiaodian:     // 交点
                IdentifyGraphicsOverlayResult gResult_Jiaodian = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);

                if (gResult_Jiaodian.Graphics.Count < 1)
                {
                    return;
                }
                Graphic selGraphic_Jiaodian = gResult_Jiaodian.Graphics.First();
                selGraphic_Jiaodian.IsSelected = true;
                listOfClipGraphics.Add(selGraphic_Jiaodian); //记录所选图形
                if (listOfClipGraphics.Count == 2)           //图形数目为1时,进行剪切计算
                {
                    Graphic g1 = listOfClipGraphics[0];
                    Graphic g2 = listOfClipGraphics[1];
                    IReadOnlyList <Geometry> resultGeometry = GeometryEngine.Intersections(g1.Geometry, g2.Geometry); //执行剪切操作
                    if (resultGeometry != null)                                                                       //处理结果
                    {
                        Graphic clipedGraphic = new Graphic(resultGeometry[0], pointSymbol);                          //利 用剪切结果构建新的图形
                        graphicsLayer.Graphics.Add(clipedGraphic);
                        operation = OperateType.None;
                    }
                    listOfClipGraphics.Clear();     //清空图形选择集合
                    graphicsLayer.ClearSelection(); //清空图形层所选
                }
                break;
            }
        }