XAML 绑定和结构体不得不说的问题

遇见一个问题

如果用一个结构体struct。再用一个ListView，然后使用绑定。

<Window x:Class="WpfApp1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">

    <Window.Resources>
        <DataTemplate x:Key="ItemProjectTemplate">
            <StackPanel>
                <Image Source="img/1.jpg" Width="50" Height="50" />
                <TextBlock FontSize="22" Text="{Binding Name}" />
            </StackPanel>
        </DataTemplate>
    </Window.Resources>

    <ListView HorizontalAlignment="Left" Height="400"
              VerticalAlignment="Top" Width="423"
              x:Name="Projects"
              ItemTemplate="{StaticResource ItemProjectTemplate}"/>
</Window>

using System.Windows;

namespace WpfApp1
{
    public struct Project
    {
        public string Name;
    }
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            Projects.ItemsSource = InitProject();
        }

        private Project[] InitProject()
        {
            Project[] x = new Project[];

            x[].Name = "";
            x[].Name = "";
            x[].Name = "";

            return x;
        }
    }
}

看一看效果

会发现图片加载出来了，可是绑定的文本数据不见了~

在https://stackoverflow.com/questions/13101449/xaml-binding-code-not-working有这样的答复

DataBinding works for Properties and not on Fields. Replace Struct with class and make your fields as properties-

因为结构体里面是字段不是属性，所以就没有作用了。需要改写成

public struct Project
{
    public string Name { get; set; }
}

这样就显示正常了

或者有更加高端的做法，用一个转化器

using System;
using System.Globalization;
using System.Windows.Data;

namespace WpfApp1
{
    public class Name : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is Project project)
            {
                var name = project.Name;
                return name;
            }

            return null;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}

<Window x:Class="WpfApp1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800"
        xmlns:convert="clr-namespace:WpfApp1">

    <Window.Resources>

        <convert:Name x:Key="Name"/>

        <DataTemplate x:Key="ItemProjectTemplate">
            <StackPanel>
                <Image Source="img/1.jpg" Width="50" Height="50" />
                <TextBlock FontSize="22" Text="{Binding Converter={StaticResource Name}}" />
            </StackPanel>
        </DataTemplate>
    </Window.Resources>

    <ListView HorizontalAlignment="Left" Height="400"
              VerticalAlignment="Top" Width="423"
              x:Name="Projects"
              ItemTemplate="{StaticResource ItemProjectTemplate}"/>
</Window>