C# 组合框不显示所选项目

代码：

private ObservableCollection<State> allStates = new ObservableCollection<State>();

在xaml中：

<ComboBox Name="MyComboBox" 
Width="60" Height="20" 
IsEnabled="False" 
SelectedValue="{Binding Path=OneArrow, UpdateSourceTrigger=PropertyChanged}"/>

装订很好，但我还有一个问题。 组合框不显示所选项目。我的意思是，在下拉列表中，会突出显示一个正确的项目，但当下拉列表隐藏时，不会显示任何内容

---

没有看到你们所有的班级，很难猜出是什么地方出了问题。 这是我对你的代码的解释

Xaml：

代码隐藏：

 /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            AllStates.Add(new State { Index = 1 });
            AllStates.Add(new State { Index = 2 });
            AllStates.Add(new State { Index = 3 });
            AllStates.Add(new State { Index = 4 });
        }

        private ObservableCollection<State> allStates = new ObservableCollection<State>();
        public ObservableCollection<State> AllStates 
        {
            get { return allStates; }
            set { allStates = value; }
        }

        private int oneArrow;
        public int OneArrow
        {
            get { return oneArrow; }
            set { oneArrow = value; }
        }

    }

    public class State : INotifyPropertyChanged
    {
        private int index;
        public int Index
        {
            get { return index; }
            set { index = value; NotifyPropertyChanged("Index"); }
        }


        public event PropertyChangedEventHandler PropertyChanged;
        public void NotifyPropertyChanged(string property)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(property));
            }
        }
    }

---

这似乎还可以，但就像我说的，我不知道你的State类是什么样子，也不知道OneArrow在mainform或State的什么位置

你能粘贴你的State类吗，它是State的索引部分，OneArrow的数据类型是否与Indexpublic int OneArrow{get{return intGetValueOneArrowProperty；}set相同{SetValueOneArrowProperty，value；}}public int Index{get{return Index；}set{Index=value；this.IndexTextBlock.Text=q+value.ToString；}}OneArrow和Index都是完整的。您是否将ItemsSource设置为状态集合并尝试选择int？这对我没有任何意义

 /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            AllStates.Add(new State { Index = 1 });
            AllStates.Add(new State { Index = 2 });
            AllStates.Add(new State { Index = 3 });
            AllStates.Add(new State { Index = 4 });
        }

        private ObservableCollection<State> allStates = new ObservableCollection<State>();
        public ObservableCollection<State> AllStates 
        {
            get { return allStates; }
            set { allStates = value; }
        }

        private int oneArrow;
        public int OneArrow
        {
            get { return oneArrow; }
            set { oneArrow = value; }
        }

    }

    public class State : INotifyPropertyChanged
    {
        private int index;
        public int Index
        {
            get { return index; }
            set { index = value; NotifyPropertyChanged("Index"); }
        }


        public event PropertyChangedEventHandler PropertyChanged;
        public void NotifyPropertyChanged(string property)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(property));
            }
        }
    }