在组合框中显示默认值而不显示集合名称(WPF)

定义 string 视图模型中的源属性并绑定 SelectedItem 财产 ComboBox

<ComboBox ItemsSource="{Binding Path=MonthDaysList}" SelectedItem="{Binding SelectedMonthDay}"/>

确保你实现了 INotifyPropertyChanged

public class ViewModel : INotifyPropertyChanged
{
    private ObservableCollection<string> _monthDaysList;
    public ObservableCollection<string> MonthDaysList
    {
        get { return _monthDaysList; }
        internal set { _monthDaysList = value; OnPropertyChanged(); }
    }


    private string _selectedMonthDay;
    public string SelectedMonthDay
    {
        get { return _selectedMonthDay; }
        internal set { _selectedMonthDay = value; OnPropertyChanged(); }
    }

    public void GetMonths()
    {
        MonthDaysList = new ObservableCollection<string>();
        if (MyConceptItems != null && MyConceptItems.Any())
        {
            foreach (var item in MyConceptItems)
            {
                MonthDaysList.Add(item.DateColumn);
            }
            SelectedMonthDay = MonthDaysList[0];
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged([CallerMemberName] String propertyName = "")
    {
        if (PropertyChanged != null)
            PropertyChanged.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}