这里介绍如何进行Bing Maps的开发。首先我们需要在我们的程序中引入Bing Map的SDK。具体方法,这里推荐一个链接<win8>使用Bing地图。这样一个hello world便出来了。这里主要介绍一些基本的API,进行一些基础性的开发。
在整个开发中,给我感触最深的是,在网上资料稀少的情况下,查看研究Bing Map给出的API是最有效的方法(Map API)。也许API的注释是模棱两可,但只要我们去试,便能了解这些方法的功能。
如果遇到hello world不能显示地图,在C#文件中类的构造方法中添加myMap.HomeRegion = "US"(myMap是XAML中定义的Map,具体见下面的示例代码)
using Windows.UI; using Windows.UI.Popups; using Windows.UI.Xaml; using Windows.UI.Xaml.Controls; using Windows.UI.Xaml.Controls.Primitives; using Windows.UI.Xaml.Data; using Windows.UI.Xaml.Input; using Windows.UI.Xaml.Media; using Windows.UI.Xaml.Navigation; // “空白页”项模板在 http://go.microsoft.com/fwlink/?LinkId=234238 上有介绍 namespace demo02 { /// <summary> /// 可用于自身或导航至 Frame 内部的空白页。 /// </summary> public sealed partial class BingMap : Page { public BingMap() { this.InitializeComponent(); myMap.HomeRegion = "US"; } } }
(一)添加图钉:
<Page x:Class="demo02.BingMap" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="using:demo02" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:bm="using:Bing.Maps" xmlns:m="clr-namespace:Microsoft.Maps.MapControl.WPF;assembly=Microsoft.Maps.MapControl.WPF" mc:Ignorable="d"> <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"> <bm:Map Credentials="AjOotBEFXeb3VJcFYETEqh3TesW_gf0_r5n54lBYg7pHBZWpVGuMusmccZXyMx--" x:Name="myMap"> <bm:Map.Center> <bm:Location Latitude="37.52" Longitude="121.39" /> </bm:Map.Center> <bm:Map.Children> <bm:Pushpin Tapped="JinanTapped" > <bm:MapLayer.Position> <bm:Location Latitude="36.65" Longitude="117" /> </bm:MapLayer.Position> </bm:Pushpin> <bm:Pushpin Tapped="BeijingTapped"> <bm:MapLayer.Position> <bm:Location Latitude="39.92" Longitude="116.46" /> </bm:MapLayer.Position> </bm:Pushpin> <bm:Pushpin Tapped="GuangzhouTapped"> <bm:MapLayer.Position> <bm:Location Latitude="23.16" Longitude="113.23" /> </bm:MapLayer.Position> </bm:Pushpin> </bm:Map.Children> </bm:Map> </Grid> </Page>
xmlns:bm="using:Bing.Maps"将SDK引入程序。Pushpin是图钉,Tapped是点击该图钉触发的方法,方法在C#文件中定义。Location的属性有经纬度,这是图钉在地图上的坐标。除了在XAML中静态设置图钉,我们还可以通过编程动态添加。
using Bing.Maps; using demo02.DataStructure; using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Runtime.InteropServices.WindowsRuntime; using Windows.Foundation; using Windows.Foundation.Collections; using Windows.UI; using Windows.UI.Popups; using Windows.UI.Xaml; using Windows.UI.Xaml.Controls; using Windows.UI.Xaml.Controls.Primitives; using Windows.UI.Xaml.Data; using Windows.UI.Xaml.Input; using Windows.UI.Xaml.Media; using Windows.UI.Xaml.Navigation; // “空白页”项模板在 http://go.microsoft.com/fwlink/?LinkId=234238 上有介绍 namespace demo02 { /// <summary> /// 可用于自身或导航至 Frame 内部的空白页。 /// </summary> public sealed partial class BingMap : Page { public BingMap() { this.InitializeComponent(); myMap.HomeRegion = "US"; myMap.SetZoomLevel(4.3, MapAnimationDuration.None); // 设置缩放尺度,这样地图便会放大到想要的区域,现在整个画面显示的是中国地区 //用代码标注图钉 //用图钉标注华北区 var pushpin = new Pushpin(); ToolTipService.SetToolTip(pushpin, "北京"); //鼠标放在图钉上会出现的文字提示 MapLayer.SetPosition(pushpin, new Location(39.92, 116.46)); //图钉的经纬度 pushpin.Tapped += BJTapped; //点击图钉触发的方法 myMap.Children.Add(pushpin); } private void BJTapped(object sender, Windows.UI.Xaml.Input.TappedRoutedEventArgs e) { myMap.MapType = MapType.Birdseye; //设置鸟瞰模式 Location location = new Location(); //北京经纬度 location.Latitude = 39.92; location.Longitude = 116.46; myMap.SetView(location, 12); //将视图放大到北京地区 //用图钉标注北京大学 var pushpin = new Pushpin(); ToolTipService.SetToolTip(pushpin, "Peking University 北京大学"); MapLayer.SetPosition(pushpin, new Location(39.9890077, 116.302251)); myMap.Children.Add(pushpin); //用图钉标注清华大学 var pushpin01 = new Pushpin(); ToolTipService.SetToolTip(pushpin01, "Tsinghua University 清华大学"); MapLayer.SetPosition(pushpin01, new Location(40.000531, 116.326319)); myMap.Children.Add(pushpin01); } } }
也许对于鼠标移到图钉上的文字显示的样式不满意,比如某个图钉是一个景点,当我们将鼠标移到它上面是时,最好能出现照片。这时可借助样式Style。
在App.xaml中添加如下:
<Style TargetType="ToolTip" x:Key="okStyle"> <Setter Property="Background" Value="Transparent" /> <Setter Property="BorderBrush" Value="Transparent" /> <Setter Property="BorderThickness" Value="0" /> <Setter Property="Template"> <Setter.Value> <ControlTemplate> <Border CornerRadius="5"> <Border.Background> <SolidColorBrush Color="Black" Opacity="0.5"/> </Border.Background> <ContentPresenter Margin="5"> <ContentPresenter.Content> <StackPanel Margin="5" MaxWidth="200" MinHeight="80"> <TextBlock Text="山东大学 SHANDONG UNIVERSITY" FontSize="12" Foreground="White"/> <Image Source="Images/EC/SD/SDU/sdu.jpg" Grid.ColumnSpan="5" Margin="0,0,0,10" Stretch="Fill" /> </StackPanel> </ContentPresenter.Content> </ContentPresenter> </Border> </ControlTemplate> </Setter.Value> </Setter> </Style>
位置是:
<Application x:Class="demo02.App" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="using:demo02" xmlns:RssData="using:demo02.EasyAccess.RssReader" xmlns:localData="using:demo02.Data"> <Application.Resources> <!-- 应用程序特定的资源--> <!--<x:String x:Key="AppName">WhereWeGo</x:String>--> <ResourceDictionary> <ResourceDictionary.MergedDictionaries> <!-- Styles that define common aspects of the platform look and feel Required by Visual Studio project and item templates --> <!--<ResourceDictionary Source="Common/StandardStyles.xaml"/>--> <!-- Add app resurces to this resource dictionary --> <ResourceDictionary> <RssData:FeedDataSource x:Key="feedDataSource"/> <!-- Add the DateConverter here. --> <!--<RssData:DateConverter x:Key="dateConverter" />--> </ResourceDictionary> </ResourceDictionary.MergedDictionaries> <Style TargetType="ToolTip" x:Key="okStyle"> <Setter Property="Background" Value="Transparent" /> <Setter Property="BorderBrush" Value="Transparent" /> <Setter Property="BorderThickness" Value="0" /> <Setter Property="Template"> <Setter.Value> <ControlTemplate> <Border CornerRadius="5"> <Border.Background> <SolidColorBrush Color="Black" Opacity="0.5"/> </Border.Background> <ContentPresenter Margin="5"> <ContentPresenter.Content> <StackPanel Margin="5" MaxWidth="200" MinHeight="80"> <TextBlock Text="山东大学 SHANDONG UNIVERSITY" FontSize="12" Foreground="White"/> <Image Source="Images/EC/SD/SDU/sdu.jpg" Grid.ColumnSpan="5" Margin="0,0,0,10" Stretch="Fill" /> </StackPanel> </ContentPresenter.Content> </ContentPresenter> </Border> </ControlTemplate> </Setter.Value> </Setter> </Style> </ResourceDictionary> </Application.Resources> </Application>
这样样式便定义好了,接下来看如何使用:
//用图钉标注山东大学36.677549,117.054218 var pushpin = new Pushpin(); //ToolTipService.SetToolTip(pushpin, "山东大学"); ToolTipService.SetToolTip(pushpin, new ToolTip() { Style = Application.Current.Resources["okStyle"] as Style }); MapLayer.SetPosition(pushpin, new Location(36.677549, 117.054218)); pushpin.Tapped += SDU01Tapped; myMap.Children.Add(pushpin);
(二)连线:
有了点,下面是线,能描绘出一块指定区域。下面的代码将山大济南六个校区连接起来。(PS:可以通过谷歌地图获得某个地点的API,方法是将鼠标放在某个地点,右键选择“这是哪里?”便会在搜索框中出现精确的经纬度)
//连接六大校区 MapLayer mPinLayer = new MapLayer(); myMap.Children.Add(mPinLayer); MapShapeLayer mShapeLayer = new MapShapeLayer(); myMap.ShapeLayers.Add(mShapeLayer); //定义要连接起来的点 LocationCollection mPolyShapeLocations01 = new LocationCollection(); mPolyShapeLocations01.Add(new Location(36.666818, 117.133137)); //软件园 mPolyShapeLocations01.Add(new Location(36.68525, 117.060184)); //洪家楼 mPolyShapeLocations01.Add(new Location(36.678625, 117.050547)); //中心 mPolyShapeLocations01.Add(new Location(36.650681, 117.013094)); //趵突泉 mPolyShapeLocations01.Add(new Location(36.650414, 117.022868)); //千佛山 mPolyShapeLocations01.Add(new Location(36.602489, 117.049045)); //兴隆山 mPolyShapeLocations01.Add(new Location(36.666818, 117.133137)); //软件园 for (int i = 0; i < mPolyShapeLocations01.Count; i++) { Pushpin pin = new Pushpin(); pin.Text = i.ToString(); mPinLayer.Children.Add(pin); MapLayer.SetPosition(pin, mPolyShapeLocations01[i]); } //MapPolylines是连线的API,将上面定义的点连接起来 MapPolyline polyline01 = new MapPolyline(); polyline01.Color = Windows.UI.Colors.Red; polyline01.Locations = mPolyShapeLocations01; polyline01.Width = 5.0; mShapeLayer.Shapes.Add(polyline01);