WP8.1 Study2:MapControl控件的应用

总的界面布局如下：

其xaml代码如下：

    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="450"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <Maps:MapControl Grid.Row="0" Name="myMap"/>
        
        <StackPanel Grid.Row="1">
            <TextBlock Name="sliderTextblock" HorizontalAlignment="Center" Style="{ThemeResource ControlHeaderTextBlockStyle}" />
            <Slider Name="mapSlider" ValueChanged="mapSlider_ValueChanged" Maximum="18" Minimum="0"/>
            <StackPanel Orientation="Horizontal">
                <Button Name="GetPositionButton" Content="Get" Click="GetPositionButton_Click"/>
                <Button Name="SetPositonButton" Content="Set" Click="SetPositonButton_Click"/>
            </StackPanel>
            <TextBlock Name="showMapTextblock" />
            
        </StackPanel>

    </Grid>

对应的主要的C#代码如下：

 protected async override void OnNavigatedTo(NavigationEventArgs e)
        {
            var locator = new Geolocator();//开启位置
            locator.DesiredAccuracyInMeters = 50;//设置位置服务的准确度  50米

            var position = await locator.GetGeopositionAsync(); //得到当前的位置
            await myMap.TrySetViewAsync(position.Coordinate.Point,18D);// MapControl控件显示当前位置（point是纬度和经度；18D为当前精度
            mapSlider.Value = myMap.ZoomLevel;
            
        }

        private void GetPositionButton_Click(object sender, RoutedEventArgs e)
        {
            showMapTextblock.Text = string.Format("{0},{1}", myMap.Center.Position.Longitude, myMap.Center.Position.Latitude);
        }

        private async void SetPositonButton_Click(object sender, RoutedEventArgs e)
        {
            var setposition = new Windows.Devices.Geolocation.BasicGeoposition();
            setposition.Latitude=47;
            setposition.Longitude=-122;
            var mypoint=new Windows.Devices.Geolocation.Geopoint(setposition);
            if (await myMap.TrySetViewAsync(mypoint, 18D))
            {
                //
            }
        }
      

        private void mapSlider_ValueChanged(object sender, RangeBaseValueChangedEventArgs e)
        {
            if (myMap!=null)
            {
                myMap.ZoomLevel = e.NewValue;
                double tt;
                tt = e.NewValue / 18 * 100;
                sliderTextblock.Text = string.Format("{0}%", (int)tt);
            }
        }
    }

同时还需注意在Package文件中把位置功能打开，相应步骤如下：