必应 WPF 将标签添加到图钉

Question

我正在尝试向我的图钉添加标签，并且我正在尝试两种不同的方法来将图钉添加到地图。

测试 1 来自 xaml 代码，我可以添加图钉，但我不知道如何添加文本

测试 2 来自 C# 代码，当我尝试打开地图时，我收到错误消息“对象引用未设置为“myMap.Children.Add(pin);”行上的对象实例

XAML 代码：

<Window x:Class="WPFKiosk.MapWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

         xmlns:m="clr-namespace:Microsoft.Maps.MapControl.WPF;assembly=Microsoft.Maps.MapControl.WPF"

        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WPFKiosk"

        mc:Ignorable="d"
        Title="MapWindow" Height="910" Width="1080" WindowStyle="None" ResizeMode="NoResize">

    <!-- -->
    <Window.Resources>
        <ControlTemplate x:Key="PushpinControlTemplate" TargetType="m:Pushpin">
            <Image x:Name="pinImage" Height="64" Source="/Images/Push_Pin.png"/>
        </ControlTemplate>
    </Window.Resources>
    <Grid Width="1080" Height="915">

        <m:Map x:Name="myMap" CredentialsProvider="My_Key" Mode="Road">

            <m:Pushpin Location="28,-81"/>
            <!-- Test 1 -->
        </m:Map>

        <Image HorizontalAlignment="Left" Height="100" Margin="510,740,0,0" VerticalAlignment="Top" Width="100" Source="Images/iTO Back Arrow.png" MouseLeftButtonDown="Image_MouseLeftButtonDown"/>

    </Grid>

</Window>

C#代码：

using System;
using System.Windows;
using System.Windows.Input;
using System.Windows.Threading;
using Microsoft.Maps.MapControl.WPF;
using Microsoft.Maps.MapControl.WPF.Design;
using Microsoft.Maps.MapControl.WPF.Core;
using Microsoft.Maps.MapControl.WPF.Overlays;
using System.Windows.Controls;

namespace WPFKiosk
{
    /// <summary>
    /// Interaction logic for MapWindow.xaml
    /// </summary>
    public partial class MapWindow : Window
    {
        private DispatcherTimer closeTimer;

        public MapWindow()
        {
            Pushpin pin = new Pushpin();
            pin.Location = new Location(28.5383, -81.3792);
            pin.Content = "text";
            pin.Template = (ControlTemplate)(this.Resources["PushpinControlTemplate"]);
            myMap.Children.Add(pin);
            //Test 2

            this.Left = 0;
            this.Top = 0;
            this.Topmost = true;

            InitializeComponent();

            LocationConverter locConverter = new LocationConverter();
            // Setting the map view... aka Zoom level and center of zoom
            // A string of the coordinates of a location is required
            String OrlandoLoc = "28.5383,-81.3792,0.0";
            // The String is then converted to a location that the map can interpret
            Location center = (Location)locConverter.ConvertFrom(OrlandoLoc);
            myMap.SetView(center, 13);

            closeTimer = new DispatcherTimer();
            closeTimer.Interval = TimeSpan.FromMinutes(2);
            closeTimer.Tick += CloseTimer_Tick;
            closeTimer.Start();
        }

    }
}

Answer 1

Pushpin 是一个 ContentControl，所以你可以添加任何你喜欢的内容：

<m:Pushpin Location="28,-81" Content="Hello"/>

或

<m:Pushpin Location="28,-81">
    <TextBlock Text="Hello"/>
</m:Pushpin>

或任何更复杂的内容，如

<m:Pushpin Location="28,-81">
    <Image Source="..."/>
</m:Pushpin>