Question

我已经仔细阅读了本网站上的所有相关问题，但出于某些原因，我无法用两个ListBox填充我的两个ObservableCollection es。是我的绑定问题还是模型中的某个地方？

型号：

public class DataModel : INotifyPropertyChanged
{
    public ObservableCollection<object> List1
    {
        get
        {
            return this.List1;
        }
        set
        {
            this.List1 = value;
            this.OnPropertyChanged("List1");
        }
    }

    public ObservableCollection<object> List2
    {
        get
        {
            return this.List2;
        }
        set
        {
            this.List2 = value;
            this.OnPropertyChanged("List2");
        }
    }

    public DataModel(ObservableCollection<object> _list1, ObservableCollection<object> _list2)
    {
        this.List1 = _list1;
        this.List2 = _list2;
    }

    public event PropertyChangedEventHandler PropertyChanged;

    [NotifyPropertyChangedInvocator]
    protected virtual void OnPropertyChanged(string propertyName)
    {
        PropertyChangedEventHandler handler = PropertyChanged;
        if (handler != null)
        {
            handler(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}

XAML.cs：

public partial class UserControl1 : UserControl
{
    public ObservableCollection<object> l;
    public ObservableCollection<object> m;

    public UserControl1()
    {
        l = new ObservableCollection<object> { "test1a", "test1b" };
        m = new ObservableCollection<object> { "test2a", "test2b" };
        InitializeComponent();
        DataModel inst = new DataModel(l, m);
        this.DataContext = inst;
        this.TelProps.ItemsSource = l;
        this.SurProps.ItemsSource = m;
    }
}

XAML：

<Grid Name="Grid" DataContext="inst">
    <ListBox Name="FirstProps" 
             DataContext="{Binding Source=inst}"
             ItemsSource="{Binding List1}"
             DisplayMemberPath="List1" />
    <ListBox Name="SecondProps" 
             DataContext="{Binding Source=inst}"
             ItemsSource="{Binding List2}"
             DisplayMemberPath="List2" />
</Grid>

Answer 1

您需要删除DisplayMemberPath说明符。这是为了在List1的每个项目上查找List1属性。由于List1仅包含一组字符串，因此List1上没有System.String属性，因此您会收到绑定错误。

使用ObservableCollection填充ListBox（WPF）

1 个答案: