1. 程式人生 > >XAML 繫結和結構體不得不說的問題

XAML 繫結和結構體不得不說的問題

遇見一個問題

如果用一個結構體struct。再用一個ListView,然後使用繫結。

<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>
View Code
using System.Windows;

namespace WpfApp1
{
    public struct Project
    {
        public string Name;
    }
    /// <summary>
    /// MainWindow.xaml 的互動邏輯
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            Projects.ItemsSource = InitProject();
        }

        private Project[] InitProject()
        {
            Project[] x = new Project[3];

            x[0].Name = "1";
            x[1].Name = "2";
            x[2].Name = "3";

            return x;
        }
    }
}
View Code

看一看效果

會發現圖片加載出來了,可是繫結的文字資料不見了~

https://stackoverflow.com/questions/13101449/xaml-binding-code-not-working有這樣的答覆

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

因為結構體裡面是欄位不是屬性,所以就沒有作用了。需要改寫成

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

這樣就顯示正常了