ArcGIS API for Silverlight 绘制降雨路径动画

        #region 降雨动画演示 2014-04-16List<Graphic> graphics = new List<Graphic>();int INDEX = 0;MapPoint GLOBAL = new MapPoint(); //保存上一次绘制降雨圈的点信息 2014-04-16 int INDEX_2 = 0; //控制是否是第一次绘制降雨圈/// <summary>/// 从数据库获取数据，并绘制圆/// </summary>public void DrawRainEllipseFromDatabase(){getMapDataSoapClient client = new getMapDataSoapClient();client.getJYDataByTimeSpanCompleted += new EventHandler<getJYDataByTimeSpanCompletedEventArgs>(client_getJYDataByTimeSpanCompleted);client.getJYDataByTimeSpanAsync("2014-04-08", "2014-04-11");}void client_getJYDataByTimeSpanCompleted(object sender, getJYDataByTimeSpanCompletedEventArgs e){//GraphicsLayer graphicsLayer = myMap.Layers["YLPointsLayer"] as GraphicsLayer;//graphicsLayer.ClearGraphics();ObservableCollection<JYDW> rets = e.Result;Graphic graphic;foreach (JYDW item in rets){graphic = new Graphic(){Geometry = mercator.FromGeographic(new MapPoint(double.Parse(item.LGTD.ToString().Trim()), double.Parse(item.LTTD.ToString().Trim()))),Symbol = LayoutRoot.Resources["BlueMarkerSymbol"] as Symbol};//保存属性graphic.Attributes["STCD"] = item.CMAXSTCD; //雨量站编码graphic.Attributes["TM"] = item.TM; //时间graphic.Attributes["RainV"] = item.CDRP; //雨量站名称graphic.Attributes["CDNUM"] = item.CDNUM; //降雨站数graphic.Attributes["LGTD"] = item.LGTD; //经度graphic.Attributes["LTTD"] = item.LTTD; //纬度graphics.Add(graphic);//graphicsLayer.Graphics.Add(graphic);}}/// <summary>/// 在地图上绘制圆/// </summary>/// <param name="myMap">地图</param>/// <param name="container">绘制容器</param>/// <param name="pt">要绘制的点</param>/// <param name="drawCircleLayer"></param>/// <param name="circleKm">直径</param>/// <param name="color">填充色</param>/// <param name="ellipseStroke">边框色</param>public void DrawEllipse(Map myMap, Canvas container, MapPoint pt, ref ElementLayer drawCircleLayer, double circleKm, Color color, Color ellipseStroke){if (!drawCircleLayer.Children.Contains(container)){drawCircleLayer.Children.Add(container);container.Opacity = 0.7;container.SetValue(ElementLayer.EnvelopeProperty, new Envelope(myMap.Extent.XMax, myMap.Extent.YMax, myMap.Extent.XMin, myMap.Extent.YMin));}Point ptFirst = myMap.MapToScreen(new MapPoint(Convert.ToDouble(pt.X), Convert.ToDouble(pt.Y)));Point pt7 = myMap.MapToScreen(new MapPoint((Convert.ToDouble(pt.X) + (circleKm * 1000)), Convert.ToDouble(pt.Y)));Ellipse ellipse7 = new Ellipse();ellipse7.Width = (pt7.X - ptFirst.X)*2;ellipse7.Height = ellipse7.Width;ellipse7.StrokeThickness = 1;ellipse7.Stroke = new SolidColorBrush(ellipseStroke);ellipse7.Fill = new SolidColorBrush(color);Canvas.SetLeft(ellipse7, ptFirst.X - ellipse7.Width / 2);Canvas.SetTop(ellipse7, ptFirst.Y - ellipse7.Width / 2);ellipse7.Opacity = 0.7;container.Children.Add(ellipse7);container.IsHitTestVisible = false;container.SetValue(Canvas.ZIndexProperty, 1);GLOBAL = WKIDConvert.mercator2lonlat(ESRI.ArcGIS.Client.Geometry.Geometry.NormalizeCentralMeridian(pt) as ESRI.ArcGIS.Client.Geometry.MapPoint);//每次绘制降雨圈后，将值保存起来}/// <summary>/// 绘制点/// </summary>public void DrawPoint(MapPoint mp,Graphic g){GraphicsLayer graphicsLayer = myMap.Layers["YLPointsLayer"] as GraphicsLayer;GraphicsLayer graphicsLayerText = myMap.Layers["GraphicsLayerRed"] as GraphicsLayer;//动态标记点元素Graphic graphic = new Graphic(){Geometry = mp,Symbol = LayoutRoot.Resources["BlueMarkerSymbol"] as Symbol};graphicsLayer.Graphics.Add(graphic);//动态标记数值TextSymbol textSymbol = new TextSymbol(){FontFamily = new System.Windows.Media.FontFamily("Microsoft YaHei"),Foreground = new System.Windows.Media.SolidColorBrush(ColorRevert.ToColor(tip_Base.DXT_COLOR)),FontSize = 16,Text = g.Attributes["RainV"].ToString(),OffsetX = 10,OffsetY = 23};Graphic graphicText = new Graphic(){Geometry = mp,Symbol = textSymbol};graphicsLayerText.Graphics.Add(graphicText);}/// <summary>/// 绘制连接线/// </summary>public void DrawLine(MapPoint gS, MapPoint gE){List<ESRI.ArcGIS.Client.Geometry.Polyline> polylineList = new List<ESRI.ArcGIS.Client.Geometry.Polyline>();ESRI.ArcGIS.Client.Geometry.PointCollection pointCollection = new ESRI.ArcGIS.Client.Geometry.PointCollection();pointCollection.Add(gS);pointCollection.Add(gE);ESRI.ArcGIS.Client.Geometry.Polyline polyline = new ESRI.ArcGIS.Client.Geometry.Polyline();polyline.Paths.Add(pointCollection);polylineList.Add(polyline);GraphicsLayer graphicsLayer = myMap.Layers["GraphicsDWLine"] as GraphicsLayer;foreach (ESRI.ArcGIS.Client.Geometry.Polyline pl in polylineList){Graphic graphic = new Graphic(){Symbol = LayoutRoot.Resources["DefaultLineSymbol"] as Symbol,Geometry = mercator.FromGeographic(pl)};graphicsLayer.Graphics.Add(graphic);}}/// <summary>/// 绘制每小时降雨圈/// </summary>/// <param name="myMap"></param>/// <param name="sender"></param>public void DrawEllipseHourRainCircle(Map myMap, object sender){INDEX_2++;if (GisMap.LayerExist(myMap, "RainAnimationLayer")){GisMap.DeleteLayersToMap(myMap, "RainAnimationLayer");}ElementLayer circleLayer = new ElementLayer();circleLayer.ID = "RainAnimationLayer";Canvas circleCanvas = new Canvas();Graphic tipGraphic = sender as Graphic;//通过过滤为0的值，这样经纬度坐标没有值的也被过滤掉if (Convert.ToDouble(tipGraphic.Attributes["RainV"]) != 0){Color color = new Color();double V = double.Parse(tipGraphic.Attributes["RainV"].ToString());if (V < 10){color = ColorRevert.ToColor("#FF3FC816");}else if (V >= 10 && V < 25){color = ColorRevert.ToColor("#FF1016FE");}else if (V >= 25 && V < 50){color = ColorRevert.ToColor("#FFFFEB00");}else if (V >= 50 && V < 100){color = ColorRevert.ToColor("#FFFF871C");}else if (V >= 100 && V < 200){color = ColorRevert.ToColor("#FFEB27A5");}else if (V >= 200){color = ColorRevert.ToColor("#FFE8353B");}//第一步：绘制降雨点DrawPoint(WKIDConvert.lonlat2mercator(new MapPoint(Convert.ToDouble(tipGraphic.Attributes["LGTD"]),Convert.ToDouble(tipGraphic.Attributes["LTTD"]))), tipGraphic);//第二步：绘制站点连接线if (INDEX_2 == 1){DrawLine(new MapPoint(Convert.ToDouble(tipGraphic.Attributes["LGTD"]),Convert.ToDouble(tipGraphic.Attributes["LTTD"])), new MapPoint(Convert.ToDouble(tipGraphic.Attributes["LGTD"]),Convert.ToDouble(tipGraphic.Attributes["LTTD"])));}else{DrawLine(GLOBAL, new MapPoint(Convert.ToDouble(tipGraphic.Attributes["LGTD"]),Convert.ToDouble(tipGraphic.Attributes["LTTD"])));}//第三步：绘制降雨圈this.DrawEllipse(myMap, circleCanvas, WKIDConvert.lonlat2mercator(new MapPoint(Convert.ToDouble(tipGraphic.Attributes["LGTD"]),Convert.ToDouble(tipGraphic.Attributes["LTTD"]))), ref circleLayer,Convert.ToDouble(tipGraphic.Attributes["CDNUM"]), color, color);}GisMap.AddLayersToMap(myMap, new ElementLayer[] { circleLayer });}DispatcherTimer timer = new DispatcherTimer();private void btnDW_Click(object sender, System.Windows.RoutedEventArgs e){DrawRainEllipseFromDatabase(); // 先绘点并保存数据double d = 1;try{d = double.Parse(this.tbSecond.Text.Trim());}catch (Exception){MessageBox.Show("请输入数字！");}timer.Interval = TimeSpan.FromSeconds(d);timer.Tick += new EventHandler(timer_Tick);timer.Start();}void timer_Tick(object sender, EventArgs e){try{if (INDEX < graphics.Count){DrawEllipseHourRainCircle(myMap, graphics[INDEX]);this.tb_SJ.Text = "";this.tb_ZM.Text = "";this.tb_YL.Text = "";this.tb_SJ.Text = DateTime.Parse(graphics[INDEX].Attributes["TM"].ToString()).ToString("yyyy-MM-dd HH:mm");this.tb_ZM.Text = graphics[INDEX].Attributes["STCD"].ToString().Trim();this.tb_YL.Text = graphics[INDEX].Attributes["RainV"].ToString().Trim();INDEX++; //自增}else{//INDEX = 0;timer.Stop(); //动画过程停止}}catch (Exception ex){return;}}#endregion

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