DisplayMemberPath 在 WPF 中不起作用

我要显示CustomerList\CustomerName财产项目ListBox using ItemsSource DisplayMemberPath仅限财产。但它不起作用。我不想使用DataContext或我的问题中的任何其他绑定。请帮忙。 我的代码如下：

MainWindow.xaml.cs

namespace BindingAnItemControlToAList
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
    }

    public class Customer
    {
        public string Name {get;set;}
        public string LastName { get; set; }
    }
    public class CustomerList 
    { 
        public List<Customer> Customers { get; set; }
        public List<string> CustomerName { get; set; }
        public List<string> CustomerLastName { get; set; }
        public CustomerList() 
        { 
            Customers = new List<Customer>();
            CustomerName = new List<string>();
            CustomerLastName = new List<string>();
            CustomerName.Add("Name1");
            CustomerLastName.Add("LastName1");
            CustomerName.Add("Name2");
            CustomerLastName.Add("LastName2");

            Customers.Add(new Customer() { Name = CustomerName[0], LastName = CustomerLastName[0] });
            Customers.Add(new Customer() { Name = CustomerName[1], LastName = CustomerLastName[1] });
        } 
    } 
}

**MainWindow.Xaml**
<Window x:Class="BindingAnItemControlToAList.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:BindingAnItemControlToAList"
        Title="MainWindow" Height="350" Width="525" Loaded="Window_Loaded" >
    <Window.Resources>
        <local:CustomerList x:Key="Cust"/>
    </Window.Resources>
    <Grid Name="Grid1">
        <ListBox ItemsSource="{Binding Source={StaticResource Cust}}"  DisplayMemberPath="CustomerName" Height="172" HorizontalAlignment="Left" Margin="27,23,0,0" Name="lstStates" VerticalAlignment="Top" Width="245" />
           </Grid>
</Window>

您没有将“集合”设置为 ItemsSource...因此您没有任何可供选择的内容。这将选择列表CustomerName.

<ListBox ItemsSource="{Binding Source={StaticResource Cust}, Path=CustomerName}" 
    Height="172" HorizontalAlignment="Left" Margin="27,23,0,0" Name="lstStates" 
    VerticalAlignment="Top" Width="245" />

但实际上，你应该重组你的CustomerList类...不需要有单独的列表来复制Name and LastName的领域Customer- 这意味着您不必要地重复数据，并且数据也可能与每个集合不同步。

您还应该考虑使用 INotifyPropertyChanged，并在您的类上使用 INotifyCollectionChanged（例如，使用ObservableCollection代替List，并实施INotifyPropertyChanged on the Customer类）如果可以更改集合或数据。

e.g.

public class CustomerList
{
    public ObservableCollection<Customer> Customers { get; set; }
    public CustomerList()
    {
        Customers = new ObservableCollection<Customer>();
        Customers.Add(new Customer { Name = "Name1", LastName = "LastName1" });
        Customers.Add(new Customer { Name = "Name2", LastName = "LastName2" });
    }
}

<ListBox ItemsSource="{Binding Source={StaticResource Cust}, Path=Customers}" DisplayMemberPath="Name" Height="172" HorizontalAlignment="Left" Margin="27,23,0,0" Name="lstStates" VerticalAlignment="Top" Width="245" />