原文:ArcGIS API for Silverlight 实现修改地图上的工程点位置
#region 处理工程点点击编辑相关事件
public Graphic editgraphics = null; //待编辑的Graphics图层
public Graphic oldgraphics = null; //原先Graphics图层
public Symbol symbolold = null;
/// <summary>
/// 在地图上点击编辑点处理事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void myMap_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
ESRI.ArcGIS.Client.Projection.WebMercator mercator = new ESRI.ArcGIS.Client.Projection.WebMercator();
try
{
if (editgraphics != null)
{
if (isedit)
{
System.Windows.Point screenPoint = e.GetPosition(myMap);
ESRI.ArcGIS.Client.Geometry.MapPoint mapPoint = myMap.ScreenToMap(screenPoint);
double x = Math.Round(mapPoint.X, 4);
double y = Math.Round(mapPoint.Y, 4);
MapPoint mp = new MapPoint(x, y);
editgraphics.Geometry = mp;
}
else
{
editgraphics = oldgraphics;
}
}
else
{
}
}
catch (Exception)
{
return;
}
}
void graphic_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
Graphic graphic = sender as Graphic;
oldgraphics = graphic; //保存原先的Graphics图层
isedit = true;
//选工程点
if (graphic != null)
{
//将上一个图元还原第一个图元
if (symbolold != null)
{
editgraphics.Symbol = symbolold;
}
editgraphics = graphic;
symbolold = editgraphics.Symbol;
editgraphics.Symbol = ((SimpleMarkerSymbol)this.FindName("SimpleSymbol"));
ESRI.ArcGIS.Client.Geometry.MapPoint mp = (MapPoint)graphic.Geometry;
ESRI.ArcGIS.Client.Projection.WebMercator mercator = new ESRI.ArcGIS.Client.Projection.WebMercator();
mp = WKIDConvert.mercator2lonlat(ESRI.ArcGIS.Client.Geometry.Geometry.NormalizeCentralMeridian(mp) as ESRI.ArcGIS.Client.Geometry.MapPoint);
//打开Tab进行编辑操作
this.gridTab2.Width = new GridLength(278, GridUnitType.Pixel);
tbTip1.Text = "<<";
string title = graphic.Attributes["NAME"].ToString(); //工程名称
this.tbProjectName.Text = title;
this.tbLatitute.Text = Math.Round(mp.X, 4).ToString(); //经度
this.tbLongitute.Text = Math.Round(mp.Y, 4).ToString(); //纬度
}
}
void graphic_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
Graphic graphic = sender as Graphic;
editgraphics.Symbol = ((SimpleMarkerSymbol)this.FindName("SimpleSymbol"));
ESRI.ArcGIS.Client.Geometry.MapPoint mp = (MapPoint)graphic.Geometry;
ESRI.ArcGIS.Client.Projection.WebMercator mercator = new ESRI.ArcGIS.Client.Projection.WebMercator();
mp = WKIDConvert.mercator2lonlat(ESRI.ArcGIS.Client.Geometry.Geometry.NormalizeCentralMeridian(mp) as ESRI.ArcGIS.Client.Geometry.MapPoint);
string title = graphic.Attributes["NAME"].ToString(); //工程名称
this.tbProjectName.Text = title;
this.tblEditName.Text = title;
this.tbLatitute.Text = Math.Round(mp.X, 4).ToString(); //经度
this.tbLongitute.Text = Math.Round(mp.Y, 4).ToString(); //纬度
}
void graphic_MouseMove(object sender, MouseEventArgs e)
{
Graphic graphic = sender as Graphic;
Grid grid = new Grid();
grid.Background = new SolidColorBrush(Colors.Blue);
TextBlock msg = new TextBlock();
msg.Foreground = new SolidColorBrush(Colors.White);
msg.FontSize = 13;
msg.FontFamily = new FontFamily("Microsoft YaHei");
msg.Text = graphic.Attributes["NAME"].ToString();
grid.Children.Add(msg);
graphic.MapTip = grid;
}
RichTextBox rtb;
void graphic_MouseRightButtonUp(object sender, MouseButtonEventArgs e)
{
if (isedit)
{
//只有在选中点开始编辑后，才可以取消编辑
RTBContextMenu menu = new RTBContextMenu(rtb, this);
menu.Show(e.GetPosition(LayoutRoot));
}
else
{
//什么也不执行
}
}
void graphic_MouseRightButtonDown(object sender, MouseButtonEventArgs e)
{
e.Handled = true;
}
private void btnModify_Click(object sender, System.Windows.RoutedEventArgs e)
{
try
{
if (string.IsNullOrEmpty(this.tbProjectName.Text))
{
MessageBox.Show("请先选择一个工程点！");
}
else
{
MapPoint mp = (MapPoint)editgraphics.Geometry;
getDataSoapClient client = new getDataSoapClient();
client.updagePositionCompleted += new EventHandler<AsyncCompletedEventArgs>(client_updagePositionCompleted);
MapPoint mapPoint = WKIDConvert.mercator2lonlat(ESRI.ArcGIS.Client.Geometry.Geometry.NormalizeCentralMeridian(mp) as ESRI.ArcGIS.Client.Geometry.MapPoint);
client.updagePositionAsync(this.tbProjectName.Text, Math.Round(mapPoint.X, 4).ToString(), Math.Round(mapPoint.Y, 4).ToString());
}
}
catch (Exception)
{
MessageBox.Show("请先选择一个工程点！");
}
}
void client_updagePositionCompleted(object sender, AsyncCompletedEventArgs e)
{
//重新加载数据,这里需要维持地图缩放的比例
ESRI.ArcGIS.Client.Projection.WebMercator mercator = new ESRI.ArcGIS.Client.Projection.WebMercator();
ESRI.ArcGIS.Client.Geometry.Envelope selectedFeatureExtent = mercator.ToGeographic(editgraphics.Geometry).Extent; //选中点的位置
double expandPercentage = 10;
//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）
double widthExpand = (selectedFeatureExtent.Width + 5) * (expandPercentage / 100);
double heightExpand = (selectedFeatureExtent.Height + 5) * (expandPercentage / 100);
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))))
{
SpatialReference = new SpatialReference(102100)
};
MessageBox.Show("工程位置更新成功！");
//重新加载地图
GetGCInfoByType(tip_Base.CurrentValue);
//重新置文本输入框为空
this.tbProjectName.Text = "";
this.tbLatitute.Text = "";
this.tbLongitute.Text = "";
}
#endregion
using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Media.Imaging;
using System.Windows.Media.Effects;
using ESRI.ArcGIS.Client.FeatureService.Symbols;
using ESRI.ArcGIS.Client.Geometry;
namespace MapClient.CommonClass
{
public class RTBContextMenu : ContextMenu
{
RichTextBox rtb;
GCSiteM _gcSite;
public RTBContextMenu(RichTextBox rtb, GCSiteM gcSite)
{
this.rtb = rtb;
_gcSite = gcSite;
}
//构造菜单按钮并返回一个FrameworkElement对象
protected override FrameworkElement GetContent()
{
Border border = new Border() { BorderBrush = new SolidColorBrush(Color.FromArgb(255, 167, 171, 176)), BorderThickness = new Thickness(1), Background = new SolidColorBrush(Colors.White) };
border.Effect = new DropShadowEffect() { BlurRadius = 3, Color = Color.FromArgb(255, 230, 227, 236) };
//取消选中
Button tjspButton = new Button() { Height = 22, Margin = new Thickness(0, 0, 0, 0), HorizontalAlignment = HorizontalAlignment.Stretch, VerticalAlignment = VerticalAlignment.Top, HorizontalContentAlignment = HorizontalAlignment.Left };
tjspButton.Style = Application.Current.Resources["ContextMenuButton"] as Style;
tjspButton.Click += new RoutedEventHandler(tjspButton_Click);
tjspButton.Content = "取消选中";
border.Child = tjspButton;
return border;
}
void tjspButton_Click(object sender, RoutedEventArgs e)
{
//恢复原来的颜色
_gcSite.editgraphics.Symbol = new SimpleMarkerSymbol()
{
Color = new SolidColorBrush(ColorRevert.ToColor("#FF0551A7")),
Size = 10,
Style = ESRI.ArcGIS.Client.FeatureService.Symbols.SimpleMarkerSymbol.SimpleMarkerStyle.Circle
};
_gcSite.isedit = false;
//重新加载数据,这里需要维持地图缩放的比例
ESRI.ArcGIS.Client.Projection.WebMercator mercator = new ESRI.ArcGIS.Client.Projection.WebMercator();
ESRI.ArcGIS.Client.Geometry.Envelope selectedFeatureExtent = mercator.ToGeographic(_gcSite.oldgraphics.Geometry).Extent; //原先选中点的位置
double expandPercentage = 10;
//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）
double widthExpand = (selectedFeatureExtent.Width + 5) * (expandPercentage / 100);
double heightExpand = (selectedFeatureExtent.Height + 5) * (expandPercentage / 100);
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))))
{
SpatialReference = new SpatialReference(102100)
};
//重新加载地图
_gcSite.GetGCInfoByType(tip_Base.CurrentValue);
//重新置文本输入框为空
_gcSite.tbProjectName.Text = "";
_gcSite.tbLatitute.Text = "";
_gcSite.tbLongitute.Text = "";
Close();
}
}
}
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