将值绑定到必应地图上的纬度和经度
本文关键字：纬度 经度 地图 绑定 | 更新日期: 2023-09-27 18:04:53
我有一个包含Map的DataTemplate
<DataTemplate x:Key="MyMeetingsWithMapSquares">
<Grid Width="350" Height="290" DataContext="{Binding}" >
<StackPanel >
<StackPanel.Background>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0,1" >
<GradientStop Color="#FF0072C6" Offset="0"/>
<GradientStop Color="#FF008FD4" Offset="1"/>
</LinearGradientBrush>
</StackPanel.Background>
<Grid DataContext="{Binding}">
<Grid.RowDefinitions>
<RowDefinition Height="90"/>
<RowDefinition Height="60"/>
<RowDefinition Height="50"/>
<RowDefinition Height="150"/>
</Grid.RowDefinitions>
<Border BorderBrush="#0166a0" BorderThickness="0,0,0,1" Margin="10,0,10,0">
<StackPanel Grid.Row="0">
<Grid DataContext="{Binding}">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="220"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid Grid.Column="0">
<Grid.RowDefinitions>
<RowDefinition Height="50"/>
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<StackPanel Orientation="Horizontal">
<TextBlock Grid.Row="0" Margin="0,16,0,0" Text="{Binding MyMeetingSquareDayNumber}" Width="40" FontFamily="Segoe UI Semibold" FontSize="33" FontWeight="SemiBold" VerticalAlignment="Top"/>
<TextBlock Grid.Row="0" Margin="0,16,0,0" Text="{Binding MyMeetingSquareMonthText}" Width="60" FontFamily="Segoe UI Regular" FontSize="33" FontWeight="Normal" VerticalAlignment="Top"/>
<TextBlock Grid.Row="0" Margin="0,16,0,0" Text="{Binding MyMeetingSquareYearText}" Width="60" FontFamily="Segoe UI Light" FontSize="33" FontWeight="Light" VerticalAlignment="Top" HorizontalAlignment="Left"/>
</StackPanel>
<TextBlock Grid.Row="1" Margin="0,5,0,0" Text="Business meeting" FontFamily="Segoe UI Semibold" FontSize="24" FontWeight="SemiBold" VerticalAlignment="Center"/>
</Grid>
<StackPanel Grid.Column="1" VerticalAlignment="Center">
<TextBlock Text="{Binding MyMeetingSquareDayHour}" HorizontalAlignment="Right" VerticalAlignment="Center" Margin="0,0,10,0"/>
</StackPanel>
</Grid>
</StackPanel>
</Border>
<Border Grid.Row="1" BorderBrush="#0166a0" BorderThickness="0,0,0,1" Margin="10,0,10,0">
<StackPanel >
<TextBlock Text="{Binding MyMeetingSquareSummary}" FontFamily="Segoe UI Light" FontSize="16" Margin="0,10,0,10" TextWrapping="Wrap"/>
</StackPanel>
</Border>
<StackPanel Grid.Row="2">
<Border BorderBrush="#0166a0" BorderThickness="0,0,0,1" Margin="10,0,10,0">
<ScrollViewer VerticalScrollBarVisibility="Hidden" VerticalScrollMode="Disabled" HorizontalScrollBarVisibility="Hidden" HorizontalScrollMode="Enabled">
<GridView ItemContainerStyle="{StaticResource GridViewItemStyle2}" ItemsSource="{Binding MyMeetingsSquareUsers}" ItemTemplateSelector="{StaticResource meetingSelector}" Grid.Row="1" Margin="0,10,0,0" SelectionMode="None" HorizontalContentAlignment="Left" VerticalContentAlignment="Bottom">
<GridView.ItemsPanel>
<ItemsPanelTemplate>
<ItemsWrapGrid Orientation="Vertical" MaximumRowsOrColumns="1"/>
</ItemsPanelTemplate>
</GridView.ItemsPanel>
</GridView>
</ScrollViewer>
</Border>
</StackPanel>
<StackPanel Grid.Row="3" Height="150" DataContext="{Binding}">
<Maps:Map Tag="{Binding MyMeetingSquareLat}" Margin="0,10,0,0" DoubleTappedOverride="Map_DoubleTappedOverride" ShowBreadcrumb="False" Height="150" ShowNavigationBar="False" ShowScaleBar="False" ShowTraffic="False" Width="350" Credentials="AnZKLHgAfKSwa5BAB2Kr-g8KENJBm1US3txxxxxxzCDUAgxhgJZVXyUgRIwM" ViewChanged="Map_ViewChanged" >
<Maps:Map.Center>
<Maps:Location Latitude="{Binding MyMeetingSquareLat}" Longitude="{Binding MyMeetingSquareLng}"/>
</Maps:Map.Center>
</Maps:Map>
</StackPanel>
</Grid>
</StackPanel>
</Grid>
</DataTemplate>
我试图将值绑定到它的纬度和经度，但由于某种原因，它们总是0。我尝试将其中一个值绑定到Map标签，它工作了，标签是49.597378，但纬度是0。
如何将值传递给地图lat和LNG ?
编辑
所以我已经改变了我的代码中的一些东西，并添加了一个图钉
<StackPanel Grid.Row="3" Height="150" DataContext="{Binding}">
<Maps:Map Tag="{Binding MyMeetingSquareLat}" DataContext="{Binding}" ZoomLevel="5" Margin="0,10,0,0" DoubleTappedOverride="Map_DoubleTappedOverride" ShowBreadcrumb="False" Height="150" ShowNavigationBar="False" ShowScaleBar="False" ShowTraffic="False" Width="350" Credentials="AnZKLHgAfKSwa5BAB2Kr-g8KENJBmxxxxxxyOCEwbJzCDUAgxhgJZVXyUgRIwM" ViewChanged="Map_ViewChanged" >
<Maps:Map.Center>
<Maps:Location Latitude="{Binding MyMeetingSquareLat}" Longitude="{Binding MyMeetingSquareLng}"/>
</Maps:Map.Center>
<Maps:Map.Children>
<Maps:Pushpin >
<Maps:Pushpin.Background>
<ImageBrush Stretch="Fill" ImageSource="ms-appx:///Assets/Pdf/edit.png"/>
</Maps:Pushpin.Background>
<Maps:MapLayer.Position>
<Maps:Location Latitude="{Binding MyMeetingSquareLat}" Longitude="{Binding MyMeetingSquareLng}" />
</Maps:MapLayer.Position>
</Maps:Pushpin>
</Maps:Map.Children>
</Maps:Map>
</StackPanel>
</Grid>
</StackPanel>
图钉出现在正确的位置，但地图中心继续移动到0 0点，由于某种原因，它没有读取绑定的值
您正在将字符串(如您在评论中所说)绑定到Maps:Location的Latitude属性。然而，Maps:Location期望此值为double。
您需要使用以下代码将该值转换为双精度类型:
Double.Parse(myStringValue);
如果值MyMeetingSquareLat本身不能更改为字符串，则添加另一个像这样的属性，并绑定到它:
public Double MyMeetingSquareLatDouble
{
get
{
return Double.Parse(this.MyMeetingSquareLat);
}
}