ArcGIS API for Silverlight 当DataGrid选中项时，地图聚焦弹出窗口，并可以播放音频文件

先看效果图，然后上代码：

<UserControl x:Class="MapClient.PicMusic"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    d:DesignHeight="250" d:DesignWidth="300">

    <Grid x:Name="LayoutRoot" Background="White" HorizontalAlignment="Left" Width="300" Height="250" VerticalAlignment="Top">
        <Border Margin="0" BorderBrush="#FF95C8F7" BorderThickness="1" CornerRadius="8">
            <Border.Background>
                <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                    <GradientStop Color="White" Offset="0"/>
                    <GradientStop Color="#FFBBD7EF" Offset="0.194"/>
                </LinearGradientBrush>
            </Border.Background>
            <Border BorderBrush="#FF95C8F7" BorderThickness="1" Margin="7,31,7,7" Background="White">
                <Grid Margin="-5,-26,-11,-8">
                    <Grid.RowDefinitions>
                        <RowDefinition Height="0.096*"/>
                        <RowDefinition Height="0.904*"/>
                    </Grid.RowDefinitions>
                    <Border Margin="6,4,13,96" Grid.Row="1" BorderThickness="0.5">
                        <Border Margin="30,0">
                            <Border.Background>
                                <ImageBrush Stretch="Fill" ImageSource="Images/bg.png"/>
                            </Border.Background>
                            <Image x:Name="gcImg" Margin="8,5"/>
                        </Border>
                    </Border>
                    <Grid Height="86" Margin="0" Grid.Row="1" VerticalAlignment="Bottom">
                        <ScrollViewer Margin="6,-9,12,9" ScrollViewer.HorizontalScrollBarVisibility="Hidden" ScrollViewer.VerticalScrollBarVisibility="Auto" BorderThickness="0.5">
                            <TextBlock x:Name="tbSKShortMes" TextWrapping="Wrap" Text="这里是水库的详细信息介绍内容" FontSize="14.667" FontFamily="Microsoft YaHei" Height="76" Width="276" HorizontalAlignment="Center" VerticalAlignment="Center" />
                        </ScrollViewer>
                    </Grid>
                    <StackPanel HorizontalAlignment="Right" Width="91" Orientation="Horizontal" Margin="0,-4,13,4">
                        <Image x:Name="imgStart"  HorizontalAlignment="Left" Height="25" Margin="3,0,5,-5" Width="22" Source="Images/button_grey_play.png" MouseLeftButtonDown="imgStart_MouseLeftButtonDown" MouseLeftButtonUp="imgStart_MouseLeftButtonUp" ToolTipService.ToolTip="播放" Cursor="Hand"/>
                        <Image x:Name="imgPause" HorizontalAlignment="Left" Height="25" Margin="5,0,5,-5" Width="22" Source="Images/button_grey_pause.png" MouseLeftButtonDown="imgPause_MouseLeftButtonDown" MouseLeftButtonUp="imgPause_MouseLeftButtonUp" ToolTipService.ToolTip="暂停" Cursor="Hand"/>
                        <Image x:Name="imgEnd" HorizontalAlignment="Left" Height="25" Margin="5,0,0,-5" Width="22" Source="Images/button_grey_stop.png" MouseLeftButtonDown="imgEnd_MouseLeftButtonDown" MouseLeftButtonUp="imgEnd_MouseLeftButtonUp" ToolTipService.ToolTip="停止" Cursor="Hand"/>
                    </StackPanel>
                    <TextBlock x:Name="gcNM" Margin="105,0,129,3" TextWrapping="Wrap" Text="东风水库" FontWeight="Bold" Cursor="Hand" FontSize="14.667" FontFamily="Microsoft YaHei" Foreground="#FF0056FF" d:LayoutOverrides="Width, Height"/>
                    <MediaElement x:Name="media" HorizontalAlignment="Right" Margin="0,0,104,3" Width="21"/>
                </Grid>
            </Border>
        
        </Border>
    </Grid>
</UserControl>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Text;
using System.Windows.Controls.Primitives;
using System.Windows.Media.Imaging;
using MapClient.ServiceReference1;
using System.Collections.ObjectModel;

namespace MapClient
{
    public partial class PicMusic : UserControl
    {
        SK sk; //水库
        HL hl; //河流
        PGZ pgz; //排灌站
        DF df; //堤防
        SZ sz; //水闸
        PWK pwk; //排污口
        GSZ gsz; //供水站

        string l_name;
        string l_Id;
        string l_type;

        public PicMusic()
        {
            InitializeComponent();
        }

        #region 通用方法，只需要更改Show，在实例化窗体的时候，传入不同的参数即可

        private Point _location;
        private bool _isShowing;
        private Popup _popup;
        private Grid _grid;
        private Canvas _canvas;
        private FrameworkElement _content;

        //初始化并显示弹出窗体.公共方法在显示菜单项时调用
        public void Show(Point location, string name, string Id, string type)
        {
            this.l_name = name;
            this.l_Id = Id;
            this.l_type = type;
            /***************2013-05-22**************************/
            this.gcNM.Text = name; //显示工程名称
            if (_isShowing)
                throw new InvalidOperationException();
            _isShowing = true;
            _location = location;
            ConstructPopup(this);
            _popup.IsOpen = true;

            //处理标题的间距问题
            string tmp = name;
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < tmp.Length; i++)
            {
                sb.Append(tmp[i] + " ");
            }

            getDataSoapClient client = new getDataSoapClient();
            client.getGCMediaByIdCompleted += new EventHandler<getGCMediaByIdCompletedEventArgs>(client_getGCMediaByIdCompleted);
            client.getGCMediaByIdAsync(Id, type);
        }

        void client_getGCMediaByIdCompleted(object sender, getGCMediaByIdCompletedEventArgs e)
        {
            try
            {
                ObservableCollection<tb_GCMEDIA> lists = e.Result;
                if (lists.Count > 0)
                {
                    foreach (tb_GCMEDIA item in lists)
                    {
                        //工程名称
                        this.gcNM.Text = item.GCNM.Trim();
                        string[] s = { "ClientBin" };
                        //音频MP3文件
                        string urlM = App.Current.Host.Source.OriginalString.ToString().Split(s, StringSplitOptions.RemoveEmptyEntries)[0] + item.MP3URL.ToString().Trim(new char[] { '.', '/' });

                        this.media.Source = new Uri(urlM, UriKind.RelativeOrAbsolute);
                        //图片文件
                        string urlA = App.Current.Host.Source.OriginalString.ToString().Split(s, StringSplitOptions.RemoveEmptyEntries)[0] + item.PICURL.ToString().Trim(new char[] { '.', '/' });
                        Uri uri = new Uri(urlA, UriKind.RelativeOrAbsolute);
                        BitmapImage image = new BitmapImage(uri);
                        this.gcImg.Source = image;
                        //工程简要说明
                        this.tbSKShortMes.Text = item.MEMO;
                    }
                }
                else
                {
                    this.media.Source = new Uri("sound.mp3", UriKind.Relative); //音频资料
                    Uri uri = new Uri("Images/noPic.jpg", UriKind.Relative);
                    BitmapImage image = new BitmapImage(uri);
                    this.gcImg.Source = image; //工程图片
                    this.tbSKShortMes.Text = "暂无资料，请上传！"; //工程简要说明
                }
            }
            catch (Exception)
            {
                this.media.Source = new Uri("sound.mp3", UriKind.Relative); //音频资料
                Uri uri = new Uri("Images/noPic.jpg", UriKind.Relative);
                BitmapImage image = new BitmapImage(uri);
                this.gcImg.Source = image; //工程图片
                this.tbSKShortMes.Text = "暂无资料，请上传！"; //工程简要说明
            }
        }

        public void Show(Point location)
        {
            if (_isShowing)
                throw new InvalidOperationException();
            _isShowing = true;
            _location = location;
            ConstructPopup(this);
            _popup.IsOpen = true;
        }

        //关闭弹出窗体
        public void Close()
        {
            _isShowing = false;
            if (_popup != null)
            {
                _popup.IsOpen = false;
            }
        }

        //弹出框外面点击则关闭该窗口
        protected virtual void OnClickOutside()
        {
            Close();
        }

        // 用Grid来布局，初始化弹出窗体
        //在Grid里面添加一个Canvas，用来监测菜单项外面的鼠标点击事件
        private void ConstructPopup(FrameworkElement _element)
        {
            if (_popup != null)
                return;
            _popup = new Popup();
            _grid = new Grid();
            _popup.Child = _grid;
            _canvas = new Canvas();
            _canvas.MouseLeftButtonDown += (sender, args) => { OnClickOutside(); };
            _canvas.MouseRightButtonDown += (sender, args) => { args.Handled = true; OnClickOutside(); };
            _canvas.Background = new SolidColorBrush(Colors.Transparent);
            _grid.Children.Add(_canvas);
            _content = _element;
            _content.HorizontalAlignment = HorizontalAlignment.Left;
            _content.VerticalAlignment = VerticalAlignment.Top;
            _content.Margin = new Thickness(_location.X, _location.Y, 0, 0);
            _grid.Children.Add(_content);
            UpdateSize();
        }

        /// <summary>
        /// 更新大小
        /// </summary>
        private void UpdateSize()
        {
            _grid.Width = Application.Current.Host.Content.ActualWidth;
            _grid.Height = Application.Current.Host.Content.ActualHeight;
            if (_canvas != null)
            {
                _canvas.Width = _grid.Width;
                _canvas.Height = _grid.Height;
            }
        }

        #endregion

        #region WebService 调用方法及关闭窗体方法



        public void closeWindow(SK mp)
        {
            mp.LayoutRoot.Children.RemoveAt(mp.LayoutRoot.Children.Count - 1);
        }

        public void closeWindow(HL mp)
        {
            mp.LayoutRoot.Children.RemoveAt(mp.LayoutRoot.Children.Count - 1);
        }

        public void closeWindow(DF mp)
        {
            mp.LayoutRoot.Children.RemoveAt(mp.LayoutRoot.Children.Count - 1);
        }

        public void closeWindow(PGZ mp)
        {
            mp.LayoutRoot.Children.RemoveAt(mp.LayoutRoot.Children.Count - 1);
        }

        public void closeWindow(GSZ mp)
        {
            mp.LayoutRoot.Children.RemoveAt(mp.LayoutRoot.Children.Count - 1);
        }

        public void closeWindow(PWK mp)
        {
            mp.LayoutRoot.Children.RemoveAt(mp.LayoutRoot.Children.Count - 1);
        }

        public void closeWindow(SZ mp)
        {
            mp.LayoutRoot.Children.RemoveAt(mp.LayoutRoot.Children.Count - 1);
        }

        private void imgStart_MouseLeftButtonDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
        {
            // 在此处添加事件处理程序实现。
            e.Handled = true;
            Uri uri = new Uri("Images/button_blue_play.png", UriKind.Relative);
            BitmapImage image = new BitmapImage(uri);
            this.imgStart.Source = image;

            //其他变成灰色图案
            uri = new Uri("Images/button_grey_pause.png", UriKind.Relative);
            BitmapImage image2 = new BitmapImage(uri);
            this.imgPause.Source = image2;

            uri = new Uri("Images/button_grey_stop.png", UriKind.Relative);
            BitmapImage image3 = new BitmapImage(uri);
            this.imgEnd.Source = image3;
        }

        private void imgStart_MouseLeftButtonUp(object sender, System.Windows.Input.MouseButtonEventArgs e)
        {
            // 在此处添加事件处理程序实现。
            this.media.Play();
        }

        private void imgPause_MouseLeftButtonDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
        {
            // 在此处添加事件处理程序实现。
            e.Handled = true;
            Uri uri = new Uri("Images/button_blue_pause.png", UriKind.Relative);
            BitmapImage image = new BitmapImage(uri);
            this.imgPause.Source = image;

            //其他变成灰色图案
            uri = new Uri("Images/button_grey_play.png", UriKind.Relative);
            BitmapImage image2 = new BitmapImage(uri);
            this.imgStart.Source = image2;

            uri = new Uri("Images/button_grey_stop.png", UriKind.Relative);
            BitmapImage image3 = new BitmapImage(uri);
            this.imgEnd.Source = image3;
        }

        private void imgPause_MouseLeftButtonUp(object sender, System.Windows.Input.MouseButtonEventArgs e)
        {
            // 在此处添加事件处理程序实现。
            this.media.Pause();
        }

        private void imgEnd_MouseLeftButtonDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
        {
            // 在此处添加事件处理程序实现。
            e.Handled = true;
            Uri uri = new Uri("Images/button_blue_stop.png", UriKind.Relative);
            BitmapImage image = new BitmapImage(uri);
            this.imgEnd.Source = image;

            //其他变成灰色图案
            uri = new Uri("Images/button_grey_pause.png", UriKind.Relative);
            BitmapImage image2 = new BitmapImage(uri);
            this.imgPause.Source = image2;

            uri = new Uri("Images/button_grey_play.png", UriKind.Relative);
            BitmapImage image3 = new BitmapImage(uri);
            this.imgStart.Source = image3;
        }

        private void imgEnd_MouseLeftButtonUp(object sender, System.Windows.Input.MouseButtonEventArgs e)
        {
            // 在此处添加事件处理程序实现。
            this.media.Stop();
        }

        #endregion
    }
}

/// <summary>
        /// 排灌站列表聚焦
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void dgPGZList_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            ESRI.ArcGIS.Client.Projection.WebMercator mercator = new ESRI.ArcGIS.Client.Projection.WebMercator();
            // 高亮和选中行相关的地图元素
            DataGrid dataGrid = sender as DataGrid;
            int selectedIndex = dataGrid.SelectedIndex;
            if (selectedIndex > -1)
            {
                tb_PGZ findResult = (tb_PGZ)dgPGZList.SelectedItem; //获取DataGrid的选中行，该DataGrid是数据的DataGrid的Name属性值
                Graphic g = new Graphic()
                {
                    Geometry = mercator.FromGeographic(new MapPoint(double.Parse(findResult.Latitute.ToString().Trim()), double.Parse(findResult.Longitute.ToString().Trim()))),
                    Symbol = LayoutRoot.Resources["DefaultMarkerSymbol"] as Symbol
                };
                //保存属性
                g.Attributes["Latitute"] = findResult.Latitute; //纬度
                g.Attributes["Longitute"] = findResult.Longitute; //经度
                g.Attributes["NM"] = findResult.BZNM; //名称
                g.Attributes["ID"] = findResult.ID;//序号
                ESRI.ArcGIS.Client.Geometry.Envelope selectedFeatureExtent = mercator.ToGeographic(g.Geometry).Extent; //选中点的位置
                double expandPercentage = 1;

                //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)
                };

                try
                {
                    //聚焦
                    myMap.ZoomTo(displayExtent);
                    ShowFocus(g);
                }
                catch (Exception)
                {
                }

                //聚焦之后，将DataGrid中被选中记录的选中状态置空
                dataGrid.SelectedIndex = -1;

                //聚焦是加载到SL中间显示并自动添加Tip信息
                GeneralTransform gt = this.TransformToVisual(Application.Current.RootVisual as UIElement);
                double x = Browser.ClientWidth;
                double y = Browser.ClientHeight;
                Point offset = gt.Transform(new Point(x / 2, y / 2));
                double controlTop = offset.Y - 125;
                double controlLeft = offset.X - 300;
                Point p = new Point(controlLeft, controlTop);
                tip_Base.g_PicMusic = new PicMusic();
                tip_Base.g_PicMusic.Show(p, g.Attributes["NM"].ToString(), g.Attributes["ID"].ToString(), "4");
            }
            else
            {
                //不进行任何处理
            }
        }