ArcGIS API for Silverlight 绘制降雨路径动画

概述#region 降雨动画演示 2014-04-16 List<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;

        #region 降雨动画演示 2014-04-16        List<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,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"]),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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