Question

我正在尝试在Windows Phone应用程序上使用Bing Maps控件，但是当我启动地图控件所在的页面时，我收到此错误：

Failed to create a 'System.Device.Location.GeoCoordinate' from the text '0,0'. [Line: 32 Position: 58]

这是我的XAML，虽然这里没什么特别的：

<my:Map Height="224"
        HorizontalAlignment="Left"
        Margin="7,4,0,0"
        Name="map1"
        VerticalAlignment="Top"
        Width="443"
        Loaded="map1_Loaded"
        ViewChangeStart="map1_ViewChangeStart">
    <my:MapLayer Name="lMain">
        <Ellipse Fill="Red" Width="20" Height="20"
                 my:MapLayer.Position="0,0"
                 Name="ppLocation"
                 Visibility="Collapsed" />
    </my:MapLayer>
</my:Map>

我尝试使用此代码添加坐标：

GeoCoordinate ld = (Application.Current as App).curentLocation;
Location ppLoc = new Location();
GeoCoordinate g = new GeoCoordinate();

ppLoc.Latitude = ld.Latitude;
ppLoc.Longitude = ld.Longitude;
ppLoc.Altitude = ld.Altitude;

map1.SetView(ppLoc, 10);

//update pushpin location and show
MapLayer.SetPosition(ppLocation, ppLoc);
ppLocation.Visibility = System.Windows.Visibility.Visible;

但它在map1.SetView上抛出“NullReferenceExcpetion”（ppLoc，10）;

Answer 1

问题是当您为my:MapLayer.Position="0,0"设置Ellipse时。您根本不应该设置它，或者您应该将其设置为有效坐标。

此外，当您尝试设置NullReferenceExcpetion时，map1因map1.SetView(ppLoc, 10);为空而导致{。}}。

Bing Maps控制XamlParseException

1 个答案: