silverlight 连接google map

string baseUrl = "http://mt2.google.cn/vt/lyrs=s@167000000&hl=zh-CN&gl=cn&s=Galil&x=";//卫星图
string cbaseUrl = "http://mt2.google.cn/vt/lyrs=m@167000000&hl=zh-CN&gl=cn&x=0&y=0&z=0&s=Galil";//市区图

页面

<UserControl x:Class="SilverlightApplication6.MainPage"
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"
xmlns:open="clr-namespace:ESRI.ArcGIS.Client.Toolkit.DataSources;assembly=ESRI.ArcGIS.Client.Toolkit.DataSources"
xmlns:Classgoole="SilverlightApplication6"
mc:Ignorable="d"

d:DesignHeight="300" d:DesignWidth="400" xmlns:esri="http://schemas.esri.com/arcgis/client/2009">

<Grid x:Name="LayoutRoot" Background="White">
<esri:Map Background="White" HorizontalAlignment="Left" Name="map1" VerticalAlignment="Top" Height="300" Width="400">
</esri:Map>
</Grid>
</UserControl>

后台

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;
namespace SilverlightApplication6
{
public partial class MainPage : UserControl
{
public MainPage()
{
InitializeComponent();
map1.Loaded += LoadMap;
}
private void LoadMap(object sender, RoutedEventArgs e)
{
GoogleMapLayer gm = new GoogleMapLayer();

map1.Layers.Add(gm);
}

}
}

GoogleMapLayer

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 ESRI.ArcGIS.Client;
using ESRI.ArcGIS.Client.Geometry;

public class GoogleMapLayer : TiledMapServiceLayer
{
private const double cornerCoordinate = 20037508.3427892;
public override void Initialize()
{
//this.Opacity = 0.5;

this.FullExtent = new

ESRI.ArcGIS.Client.Geometry.Envelope(-20037508.342787, -20037508.342787, 20037508.342787, 20037508.342787);//(-180,-85.0511287798066,180, 85.0511287798066)

{

SpatialReference = new ESRI.ArcGIS.Client.Geometry.SpatialReference(102100);

};

this.SpatialReference = new ESRI.ArcGIS.Client.Geometry.SpatialReference(102100);

//this.InitialExtent = this.FullExtent;

this.TileInfo = new TileInfo()

{

Height = 256,

Width = 256,

Origin = new ESRI.ArcGIS.Client.Geometry.MapPoint(-20037508.342787,20037508.342787)//Origin = new ESRI.ArcGIS.Geometry.MapPoint(-180, 90)

{

SpatialReference = new ESRI.ArcGIS.Client.Geometry.SpatialReference(102100)

},

Lods = new Lod[20]

};

double resolution = 156543.033928;

for(int i = 0; i < TileInfo.Lods.Length; i++)

{

TileInfo.Lods[i] = new Lod() { Resolution = resolution };

resolution /= 2;

}

base.Initialize();

//this.FullExtent = new ESRI.ArcGIS.Client.Geometry.Envelope(-20037508.3427892, -20037508.3427892, 20037508.3427892, 20037508.3427892)
//{
// SpatialReference = new SpatialReference(102100)
//};
//// This layer's spatial reference
//this.SpatialReference = new SpatialReference(102100);
//// Set up tile information. Each tile is 256x256px, 19 levels.
//this.TileInfo = new TileInfo()
//{
// Height = 256,
// Width = 256,
// Origin = new MapPoint(-cornerCoordinate, cornerCoordinate) { SpatialReference = new ESRI.ArcGIS.Client.Geometry.SpatialReference(102100) },
// Lods = new Lod[19]
//};
//// Set the resolutions for each level. Each level is half the resolution of the previous one.
//double resolution = cornerCoordinate * 2 / 256;
//for (int i = 0; i < TileInfo.Lods.Length; i++)
//{
// TileInfo.Lods[i] = new Lod() { Resolution = resolution };
// resolution /= 2;
//}
//// Call base initialize to raise the initialization event
//base.Initialize();
}

public override string GetTileUrl(int level, int row, int col)
{
// int num = (col + (2 * row)) % 4;
// string str = "&s=";
// string str2 = "Galileo";
// int length = ((col * 3) + row) % 8;
// str = str + str2.Substring(0, length);
// if (row >= 0x2710)
// {
// }
// string str3 = "http://khm" + num.ToString() + ".google.com/kh=49&x=";
// return (str3 + col.ToString() + "&y=" + row.ToString() + "&z=" + level.ToString() + str);

string baseUrl = "http://mt2.google.cn/vt/lyrs=s@167000000&hl=zh-CN&gl=cn&s=Galil&x=";//卫星图
string cbaseUrl = "http://mt2.google.cn/vt/lyrs=m@167000000&hl=zh-CN&gl=cn&x=0&y=0&z=0&s=Galil";//市区图
string url = baseUrl + col.ToString() + "&y=" + row.ToString() + "&z=" + level.ToString() + "";
return url;
}
}