原文:ArcGIS API for Silverlight 实现修改地图上的工程点位置 

  1.  #region 处理工程点点击编辑相关事件
  2.  
  3.         public Graphic editgraphics = null; //待编辑的Graphics图层
  4.         public Graphic oldgraphics = null; //原先Graphics图层
  5.         public Symbol symbolold = null;
  6.  
  7.         /// <summary>
  8.         /// 在地图上点击编辑点处理事件
  9.         /// </summary>
  10.         /// <param name="sender"></param>
  11.         /// <param name="e"></param>
  12.         void myMap_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
  13.         {
  14.             ESRI.ArcGIS.Client.Projection.WebMercator mercator = new ESRI.ArcGIS.Client.Projection.WebMercator();
  15.             try
  16.             {
  17.                 if (editgraphics != null)
  18.                 {
  19.                     if (isedit)
  20.                     {
  21.                         System.Windows.Point screenPoint = e.GetPosition(myMap);
  22.                         ESRI.ArcGIS.Client.Geometry.MapPoint mapPoint = myMap.ScreenToMap(screenPoint);
  23.                         double x = Math.Round(mapPoint.X, 4);
  24.                         double y = Math.Round(mapPoint.Y, 4);
  25.                         MapPoint mp = new MapPoint(x, y);
  26.                         editgraphics.Geometry = mp;
  27.                     }
  28.                     else
  29.                     {
  30.                         editgraphics = oldgraphics;
  31.                     }
  32.                 }
  33.                 else
  34.                 {
  35.  
  36.                 }
  37.             }
  38.             catch (Exception)
  39.             {
  40.                 return;
  41.             }
  42.         }
  43.  
  44.         void graphic_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
  45.         {
  46.             Graphic graphic = sender as Graphic;
  47.             oldgraphics = graphic; //保存原先的Graphics图层
  48.             isedit = true;
  49.             //选工程点
  50.             if (graphic != null)
  51.             {
  52.                 //将上一个图元还原第一个图元
  53.                 if (symbolold != null)
  54.                 {
  55.                     editgraphics.Symbol = symbolold;
  56.                 }
  57.  
  58.                 editgraphics = graphic;
  59.                 symbolold = editgraphics.Symbol;
  60.                 editgraphics.Symbol = ((SimpleMarkerSymbol)this.FindName("SimpleSymbol"));
  61.  
  62.                 ESRI.ArcGIS.Client.Geometry.MapPoint mp = (MapPoint)graphic.Geometry;
  63.                 ESRI.ArcGIS.Client.Projection.WebMercator mercator = new ESRI.ArcGIS.Client.Projection.WebMercator();
  64.                 mp = WKIDConvert.mercator2lonlat(ESRI.ArcGIS.Client.Geometry.Geometry.NormalizeCentralMeridian(mp) as ESRI.ArcGIS.Client.Geometry.MapPoint);
  65.                 //打开Tab进行编辑操作
  66.                 this.gridTab2.Width = new GridLength(278, GridUnitType.Pixel);
  67.                 tbTip1.Text = "<<";
  68.                 string title = graphic.Attributes["NAME"].ToString(); //工程名称
  69.                 this.tbProjectName.Text = title;
  70.                 this.tbLatitute.Text = Math.Round(mp.X, 4).ToString(); //经度
  71.                 this.tbLongitute.Text = Math.Round(mp.Y, 4).ToString(); //纬度
  72.             }
  73.         }
  74.  
  75.         void graphic_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
  76.         {
  77.             Graphic graphic = sender as Graphic;
  78.  
  79.             editgraphics.Symbol = ((SimpleMarkerSymbol)this.FindName("SimpleSymbol"));
  80.  
  81.             ESRI.ArcGIS.Client.Geometry.MapPoint mp = (MapPoint)graphic.Geometry;
  82.             ESRI.ArcGIS.Client.Projection.WebMercator mercator = new ESRI.ArcGIS.Client.Projection.WebMercator();
  83.             mp = WKIDConvert.mercator2lonlat(ESRI.ArcGIS.Client.Geometry.Geometry.NormalizeCentralMeridian(mp) as ESRI.ArcGIS.Client.Geometry.MapPoint);
  84.             string title = graphic.Attributes["NAME"].ToString(); //工程名称
  85.             this.tbProjectName.Text = title;
  86.             this.tblEditName.Text = title;
  87.             this.tbLatitute.Text = Math.Round(mp.X, 4).ToString(); //经度
  88.             this.tbLongitute.Text = Math.Round(mp.Y, 4).ToString(); //纬度
  89.         }
  90.  
  91.         void graphic_MouseMove(object sender, MouseEventArgs e)
  92.         {
  93.             Graphic graphic = sender as Graphic;
  94.             Grid grid = new Grid();
  95.             grid.Background = new SolidColorBrush(Colors.Blue);
  96.             TextBlock msg = new TextBlock();
  97.             msg.Foreground = new SolidColorBrush(Colors.White);
  98.             msg.FontSize = 13;
  99.             msg.FontFamily = new FontFamily("Microsoft YaHei");
  100.             msg.Text = graphic.Attributes["NAME"].ToString();
  101.             grid.Children.Add(msg);
  102.             graphic.MapTip = grid;
  103.         }
  104.  
  105.         RichTextBox rtb;
  106.  
  107.         void graphic_MouseRightButtonUp(object sender, MouseButtonEventArgs e)
  108.         {
  109.             if (isedit)
  110.             {
  111.                 //只有在选中点开始编辑后，才可以取消编辑
  112.                 RTBContextMenu menu = new RTBContextMenu(rtb, this);
  113.                 menu.Show(e.GetPosition(LayoutRoot));
  114.             }
  115.             else
  116.             {
  117.                 //什么也不执行
  118.             }
  119.         }
  120.  
  121.         void graphic_MouseRightButtonDown(object sender, MouseButtonEventArgs e)
  122.         {
  123.             e.Handled = true;
  124.         }
  125.  
  126.         private void btnModify_Click(object sender, System.Windows.RoutedEventArgs e)
  127.         {
  128.             try
  129.             {
  130.                 if (string.IsNullOrEmpty(this.tbProjectName.Text))
  131.                 {
  132.                     MessageBox.Show("请先选择一个工程点！");
  133.                 }
  134.                 else
  135.                 {
  136.                     MapPoint mp = (MapPoint)editgraphics.Geometry;
  137.                     getDataSoapClient client = new getDataSoapClient();
  138.                     client.updagePositionCompleted += new EventHandler<AsyncCompletedEventArgs>(client_updagePositionCompleted);
  139.                     MapPoint mapPoint = WKIDConvert.mercator2lonlat(ESRI.ArcGIS.Client.Geometry.Geometry.NormalizeCentralMeridian(mp) as ESRI.ArcGIS.Client.Geometry.MapPoint);
  140.                     client.updagePositionAsync(this.tbProjectName.Text, Math.Round(mapPoint.X, 4).ToString(), Math.Round(mapPoint.Y, 4).ToString());
  141.                 }
  142.             }
  143.             catch (Exception)
  144.             {
  145.                 MessageBox.Show("请先选择一个工程点！");
  146.             }
  147.  
  148.         }
  149.  
  150.         void client_updagePositionCompleted(object sender, AsyncCompletedEventArgs e)
  151.         {
  152.             //重新加载数据,这里需要维持地图缩放的比例
  153.             ESRI.ArcGIS.Client.Projection.WebMercator mercator = new ESRI.ArcGIS.Client.Projection.WebMercator();
  154.             ESRI.ArcGIS.Client.Geometry.Envelope selectedFeatureExtent = mercator.ToGeographic(editgraphics.Geometry).Extent; //选中点的位置
  155.             double expandPercentage = 10;
  156.  
  157.             //加数值后，聚焦（这里需要注意，进行地理坐标和墨卡托坐标的转换）
  158.             double widthExpand = (selectedFeatureExtent.Width + 5) * (expandPercentage / 100);
  159.             double heightExpand = (selectedFeatureExtent.Height + 5) * (expandPercentage / 100);
  160.             ESRI.ArcGIS.Client.Geometry.Envelope displayExtent = new Envelope(WKIDConvert.lonlat2mercator(new MapPoint(selectedFeatureExtent.XMin - (widthExpand / 2), selectedFeatureExtent.YMin - (heightExpand / 2))), WKIDConvert.lonlat2mercator(new MapPoint(selectedFeatureExtent.XMax + (widthExpand / 2), selectedFeatureExtent.YMax + (heightExpand / 2))))
  161.             {
  162.                 SpatialReference = new SpatialReference(102100)
  163.             };
  164.  
  165.             MessageBox.Show("工程位置更新成功！");
  166.             //重新加载地图
  167.             GetGCInfoByType(tip_Base.CurrentValue);
  168.             //重新置文本输入框为空
  169.             this.tbProjectName.Text = "";
  170.             this.tbLatitute.Text = "";
  171.             this.tbLongitute.Text = "";
  172.         }
  173.  
  174.         #endregion
  175.  
  176. using System;
  177. using System.Net;
  178. using System.Windows;
  179. using System.Windows.Controls;
  180. using System.Windows.Documents;
  181. using System.Windows.Ink;
  182. using System.Windows.Input;
  183. using System.Windows.Media;
  184. using System.Windows.Media.Animation;
  185. using System.Windows.Shapes;
  186. using System.Windows.Media.Imaging;
  187. using System.Windows.Media.Effects;
  188. using ESRI.ArcGIS.Client.FeatureService.Symbols;
  189. using ESRI.ArcGIS.Client.Geometry;
  190.  
  191. namespace MapClient.CommonClass
  192. {
  193.     public class RTBContextMenu : ContextMenu
  194.     {
  195.         RichTextBox rtb;
  196.         GCSiteM _gcSite;
  197.  
  198.         public RTBContextMenu(RichTextBox rtb, GCSiteM gcSite)
  199.         {
  200.             this.rtb = rtb;
  201.             _gcSite = gcSite;
  202.         }
  203.  
  204.         //构造菜单按钮并返回一个FrameworkElement对象
  205.         protected override FrameworkElement GetContent()
  206.         {
  207.             Border border = new Border() { BorderBrush = new SolidColorBrush(Color.FromArgb(255, 167, 171, 176)), BorderThickness = new Thickness(1), Background = new SolidColorBrush(Colors.White) };
  208.             border.Effect = new DropShadowEffect() { BlurRadius = 3, Color = Color.FromArgb(255, 230, 227, 236) };
  209.  
  210.             //取消选中
  211.             Button tjspButton = new Button() { Height = 22, Margin = new Thickness(0, 0, 0, 0), HorizontalAlignment = HorizontalAlignment.Stretch, VerticalAlignment = VerticalAlignment.Top, HorizontalContentAlignment = HorizontalAlignment.Left };
  212.             tjspButton.Style = Application.Current.Resources["ContextMenuButton"] as Style;
  213.             tjspButton.Click += new RoutedEventHandler(tjspButton_Click);
  214.  
  215.             tjspButton.Content = "取消选中";
  216.  
  217.             border.Child = tjspButton;
  218.             return border;
  219.         }
  220.  
  221.         void tjspButton_Click(object sender, RoutedEventArgs e)
  222.         {
  223.             //恢复原来的颜色
  224.             _gcSite.editgraphics.Symbol = new SimpleMarkerSymbol()
  225.             {
  226.                 Color = new SolidColorBrush(ColorRevert.ToColor("#FF0551A7")),
  227.                 Size = 10,
  228.                 Style = ESRI.ArcGIS.Client.FeatureService.Symbols.SimpleMarkerSymbol.SimpleMarkerStyle.Circle
  229.             };
  230.             _gcSite.isedit = false;
  231.  
  232.             //重新加载数据,这里需要维持地图缩放的比例
  233.             ESRI.ArcGIS.Client.Projection.WebMercator mercator = new ESRI.ArcGIS.Client.Projection.WebMercator();
  234.             ESRI.ArcGIS.Client.Geometry.Envelope selectedFeatureExtent = mercator.ToGeographic(_gcSite.oldgraphics.Geometry).Extent; //原先选中点的位置
  235.             double expandPercentage = 10;
  236.  
  237.             //加数值后，聚焦（这里需要注意，进行地理坐标和墨卡托坐标的转换）
  238.             double widthExpand = (selectedFeatureExtent.Width + 5) * (expandPercentage / 100);
  239.             double heightExpand = (selectedFeatureExtent.Height + 5) * (expandPercentage / 100);
  240.             ESRI.ArcGIS.Client.Geometry.Envelope displayExt http:// ent = new Envelope(WKIDConvert.lonlat2mercator(new MapPoint(selectedFeatureExtent.XMin - (widthExpand / 2), selectedFeatureExtent.YMin - (heightExpand / 2))), WKIDConvert.lonlat2mercator(new MapPoint(selectedFeatureExtent.XMax + (widthExpand / 2), selectedFeatureExtent.YMax + (heightExpand / 2))))
  241.             {
  242.                 SpatialReference = new SpatialReference(102100)
  243.             };
  244.  
  245.             //重新加载地图
  246.             _gcSite.GetGCInfoByType(tip_Base.CurrentValue);
  247.             //重新置文本输入框为空
  248.             _gcSite.tbProjectName.Text = "";
  249.             _gcSite.tbLatitute.Text = "";
  250.             _gcSite.tbLongitute.Text = "";
  251.             Close();
  252.         }
  253.     }
  254. }

以上使用到的右键菜单功能ContextMenu.cs类请参考：http://blog.csdn.net/taomanman/article/details/7333612

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