Question

所以我编写了一个简单的数据绑定练习项目，但我有一点问题。我有一个ObservableCollection，我数据绑定到ListBox。当我运行程序时，似乎一开始ListBox中没有任何东西，但是当我将鼠标悬停在它上面时，我可以看到与ObservableCollections完全相同数量的项目的轮廓，但没有任何内容。这是我的代码：

XAML：

 <ListBox Margin="0, 40, 0, 0" x:Name="lb1" ScrollViewer.CanContentScroll="True">
        <ListBox.ItemTemplate>
            <DataTemplate>
                <DockPanel>
                    <TextBlock DockPanel.Dock="Left" x:Name="_age" Text="{Binding Path=Age}"/>
                    <TextBlock DockPanel.Dock="Right" x:Name="_cash" Text="{Binding Path=Cash}" />
                    <TextBlock DockPanel.Dock="Top" x:Name="_name" Text="{Binding Path=FullName}"/>
                    <TextBlock DockPanel.Dock="Top" x:Name="_gender" Text="{Binding Path=Gender}"/>
                </DockPanel>
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>

代码隐藏：

public class Person{
    public Person(string _FullName, int _Age, string _Gender, string _AboutMe, decimal _Cash)
    {
        this.FullName = _FullName;
        this.Age = _Age;
        this.Gender = _Gender;
        this.AboutMe = _AboutMe;
        this.Cash = _Cash;

    }
    public string FullName;
    public int Age;
    public string Gender;
    public string AboutMe;
    public decimal Cash;
}

public partial class MainWindow : Window
{

   public ObservableCollection<Person>People = new ObservableCollection<Person>();

    public MainWindow()
    {
        People.Add(new Person("John Doe", 35, "M", "My name is John Doe", 1500));
        People.Add(new Person("Sarah Maine", 28, "F", "My name is Sarah Maine", 2150));
        People.Add(new Person("George Smith", 65, "M", "My name is George Smith", 4999));
        People.Add(new Person("Rachel Ramsey", 46, "F", "My name is Rachel Ramsey", 3199));
        People.Add(new Person("Rachel Ramsey", 46, "F", "My name is Rachel Ramsey", 3199));
        InitializeComponent();

        lb1.ItemsSource = People;

    }
}

有什么想法吗？感谢

Answer 1

您的Person-Class需要一些属性而不仅仅是字段：

public class Person {
    public Person(string _FullName, int _Age, string _Gender, string _AboutMe, decimal _Cash) {
      this.FullName = _FullName;
      this.Age = _Age;
      this.Gender = _Gender;
      this.AboutMe = _AboutMe;
      this.Cash = _Cash;

    }
    private string fullName;
    private int age;
    private string gender;
    private string aboutMe;
    private decimal cash;

    public string FullName {
      get {
        return fullName;
      }

      set {
        this.fullName = value;
      }
    }

    public int Age {
      get {
        return age;
      }

      set {
        this.age = value;
      }
    }

    public string Gender {
      get {
        return gender;
      }

      set {
        this.gender = value;
      }
    }

    public string AboutMe {
      get {
        return aboutMe;
      }

      set {
        this.aboutMe = value;
      }
    }

    public decimal Cash {
      get {
        return cash;
      }

      set {
        this.cash = value;
      }
    }
  }

考虑实施INotifyPropertyChanged

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