Windows phone 7 无法使用finalRect中的无限值或NaN值调用图钉和错误UIElement.Arrange(finalRect)

Windows phone 7 无法使用finalRect中的无限值或NaN值调用图钉和错误UIElement.Arrange(finalRect),windows-phone-7,pushpin,Windows Phone 7,Pushpin,我的windows phone应用程序有问题。我有谷歌的解决方案,但我发现更好的是重写一次,所以我这样做,但我仍然得到这个错误,我不知道为什么。这是我的xaml代码 <phone:PhoneApplicationPage x:Class="GeoWatcher.Watch" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.micros

我的windows phone应用程序有问题。我有谷歌的解决方案,但我发现更好的是重写一次,所以我这样做,但我仍然得到这个错误,我不知道为什么。这是我的xaml代码

<phone:PhoneApplicationPage 
    x:Class="GeoWatcher.Watch"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    SupportedOrientations="Portrait" Orientation="Portrait"
    mc:Ignorable="d" d:DesignHeight="768" d:DesignWidth="480"
    shell:SystemTray.IsVisible="True" xmlns:my="clr-namespace:Microsoft.Phone.Controls.Maps;assembly=Microsoft.Phone.Controls.Maps" Loaded="PhoneApplicationPage_Loaded">

    <!--LayoutRoot is the root grid where all page content is placed-->
    <Grid x:Name="LayoutRoot" Background="Transparent">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <!--TitlePanel contains the name of the application and page title-->
        <StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
            <TextBlock x:Name="AplicationTitleTextBox" Text="GeoWatcher" Style="{StaticResource PhoneTextNormalStyle}"/>
            <TextBlock x:Name="PageTitle" Text="Your trip" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>
        </StackPanel>

        <!--ContentPanel - place additional content here-->
        <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
            <my:Map Height="500" HorizontalAlignment="Left" Margin="0,101,0,0" Name="MyMap" VerticalAlignment="Top" Width="450" CredentialsProvider=""/>
            <Button Content="Button" Height="72" HorizontalAlignment="Left" Margin="290,23,0,0" Name="StopButton" VerticalAlignment="Top" Width="160" />
            <TextBlock Height="30" HorizontalAlignment="Left" Margin="12,47,0,0" Name="DistanceTextBlock" Text="TextBlock" VerticalAlignment="Top" />
        </Grid>
    </Grid>

    <!--Sample code showing usage of ApplicationBar-->
    <!--<phone:PhoneApplicationPage.ApplicationBar>
        <shell:ApplicationBar IsVisible="True" IsMenuEnabled="True">
            <shell:ApplicationBarIconButton IconUri="/Images/appbar_button1.png" Text="Button 1"/>
            <shell:ApplicationBarIconButton IconUri="/Images/appbar_button2.png" Text="Button 2"/>
            <shell:ApplicationBar.MenuItems>
                <shell:ApplicationBarMenuItem Text="MenuItem 1"/>
                <shell:ApplicationBarMenuItem Text="MenuItem 2"/>
            </shell:ApplicationBar.MenuItems>
        </shell:ApplicationBar>
    </phone:PhoneApplicationPage.ApplicationBar>-->

</phone:PhoneApplicationPage>

这是我的C代码

公共部分类监视:PhoneApplicationPage
{
公共隔离存储文件myStore;
地理坐标定点位置;
图钉目的点图钉;
图钉实际位置图钉;
地球坐标观测员;
公众观察()
{
初始化组件();
}
已加载专用void PhoneApplicationPage_(对象发送方,路由目标)
{
this.myStore=IsolatedStorageFile.GetUserStoreForApplication();
this.distance textblock.Text=“”;
loadSelectedPoint();
this.destinationPointPushPin=新的图钉();
this.destinationPointPushPin.Location=this.destinationPointPosition;
this.MyMap.Children.Add(destinationPointPushPin);
this.watcher=new geocordinatewatcher();
this.watcher.PositionChanged+=新事件处理程序(watcher\u PositionChanged);
this.watcher.Start();
this.actualPositionPushPin=新的图钉();
this.actualPositionPushPin.Location=this.watcher.Position.Location;
this.MyMap.Children.Add(this.actualPositionPushPin);
this.MyMap.SetView(this.actualPositionPushPin.Location,12);
}
void watcher_位置已更改(对象发送器,地理位置更改Deventargs e)
{
此.actualPositionPushPin.Location=e.Position.Location;
}
私有void loadSelectedPoint()
{
尝试
{
使用(var isoFileStream=new IsolatedStorageFileStream(“folder\\selected.txt”,FileMode.Open,myStore))
{
//读取数据。
使用(var isoFileReader=新的流阅读器(isoFileStream))
{
String temp=isoFileReader.ReadLine();
字符串[]制表符=临时拆分('@');
GeoCoordinate geo=新的GeoCoordinate(double.Parse(选项卡[1]),double.Parse(选项卡[2]);
this.destinationPointPosition=geo;
}
}
}
捕获(例外b)
{
MessageBox.Show(b.Message);
}
}
}

我检查并正确地从文件中加载数据。问题是我猜是图钉的问题,但我不知道如何修复它。

您不能设置图钉。位置到地理坐标值未知。检查GeoCoordinate的IsUnknown属性,如果是真的,则不要显示图钉。

在哪一行代码处产生错误?
public partial class Watch : PhoneApplicationPage
    {
        public IsolatedStorageFile myStore;
        GeoCoordinate destinationPointPosition;
        Pushpin destinationPointPushPin;
        Pushpin actualPositionPushPin;
        GeoCoordinateWatcher watcher;


        public Watch()
        {
            InitializeComponent();
        }

        private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
        {
            this.myStore = IsolatedStorageFile.GetUserStoreForApplication();
            this.DistanceTextBlock.Text = "";
            loadSelectedPoint();
            this.destinationPointPushPin = new Pushpin();
            this.destinationPointPushPin.Location = this.destinationPointPosition;
            this.MyMap.Children.Add(destinationPointPushPin);
            this.watcher = new GeoCoordinateWatcher();
            this.watcher.PositionChanged += new EventHandler<GeoPositionChangedEventArgs<GeoCoordinate>>(watcher_PositionChanged);
            this.watcher.Start();
            this.actualPositionPushPin = new Pushpin();
            this.actualPositionPushPin.Location = this.watcher.Position.Location;
            this.MyMap.Children.Add(this.actualPositionPushPin);
            this.MyMap.SetView(this.actualPositionPushPin.Location, 12);
        }

        void watcher_PositionChanged(object sender, GeoPositionChangedEventArgs<GeoCoordinate> e)
        {
            this.actualPositionPushPin.Location = e.Position.Location;  
        }
        private void loadSelectedPoint()
        {
            try
            {

                using (var isoFileStream = new IsolatedStorageFileStream("folder\\selected.txt", FileMode.Open, myStore))
                {
                    // Read the data.
                    using (var isoFileReader = new StreamReader(isoFileStream))
                    {
                        String temp = isoFileReader.ReadLine();
                        string[] tab = temp.Split('@');
                        GeoCoordinate geo = new GeoCoordinate(double.Parse(tab[1]), double.Parse(tab[2]));
                        this.destinationPointPosition = geo;
                    }
                }

            }
            catch (Exception b)
            {
                MessageBox.Show(b.Message);
            }

        }
    }