如何在 C# WPF 中拥有多列下拉框？

Question

我正在尝试在 c# wpf 中创建一个多列组合框，如下所示。有任何想法吗？

当选择一行时，仅显示州代码，但所有详细信息都可以显示在下拉选择中。

Answer 1

你可以发挥一点创意来解决这个问题。假设您有一个宽度仅为 60 像素的组合框。因此，您希望组合项显示为完整的州名称和缩写，例如CA - California，但如果选择，您只需要缩写。CA。我声明一个类来代表一个状态，如下所示：public class State{&nbsp; &nbsp; public string ShortName { get; set; }&nbsp; &nbsp; public string FullName { get; set; }&nbsp; &nbsp; private string _displayName;&nbsp; &nbsp; public string DisplayName&nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; set&nbsp; &nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; _displayName = value;&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; get&nbsp; &nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (string.IsNullOrEmpty(_displayName))&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; return string.Format("{0} - {1}", ShortName, FullName);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; else&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; return _displayName;&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; }}技巧是您用来DisplayName在组合框中显示项目。然后，在getof中DisplayName，如果它已经有值，则返回它，如果没有，则连接状态的短名称和全名称。然后，当您进行数据绑定时，您将拥有一个状态列表以及SelectedState，并且在该属性的设置器中，您将DisplayName设为ShortName。所以，我的XAML：<Grid>&nbsp; &nbsp; <ComboBox ItemsSource="{Binding States}"&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; SelectedValue="{Binding SelectedState}"&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; DisplayMemberPath="DisplayName"&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Name="CmbStates" Width="60" Height="32"/></Grid>然后，在我的代码中：public partial class MainWindow : Window, INotifyPropertyChanged{&nbsp; &nbsp; public event PropertyChangedEventHandler PropertyChanged;&nbsp; &nbsp; protected void OnPropertyChanged(string propertyName)&nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));&nbsp; &nbsp; }&nbsp; &nbsp; private List<State> _states;&nbsp; &nbsp; public List<State> States&nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; get { return _states; }&nbsp; &nbsp; &nbsp; &nbsp; set&nbsp; &nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; _states = value;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; OnPropertyChanged("States");&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; }&nbsp; &nbsp; private State _selectedState;&nbsp; &nbsp; public State SelectedState&nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; get { return _selectedState; }&nbsp; &nbsp; &nbsp; &nbsp; set&nbsp; &nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; _selectedState = value;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; SelectedState.DisplayName = SelectedState.ShortName;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; OnPropertyChanged("SelectedState");&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; }&nbsp; &nbsp; public MainWindow()&nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; InitializeComponent();&nbsp; &nbsp; &nbsp; &nbsp; States = new List<State>&nbsp; &nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; new State() { FullName = "California", ShortName = "CA" },&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; new State() { FullName = "New York", ShortName = "NY" },&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; new State() { FullName = "Oregon", ShortName = "OR" }&nbsp; &nbsp; &nbsp; &nbsp; };&nbsp; &nbsp; &nbsp; &nbsp; DataContext = this;&nbsp; &nbsp; }}现在列表中应该有完整的串联名称：但只有选择时的缩写：