Question

我是Wpf的新手，我遇到了在列表框中获取所选项目的问题我创建了一个带有列表框和文本框的简单xaml。我使用绑定来填充我的列表框，包括我想要稍后使用的触发器（已检查或未检查）。

Xaml代码：

<ListBox x:Name="LstB_Checklist" HorizontalAlignment="Left" Height="190" Margin="39,45,0,0" VerticalAlignment="Top" Width="275" Background="#FF363636" BorderBrush="{x:Null}" FontSize="18" Foreground="White" BorderThickness="2" SelectionChanged="LstB_Checklist_SelectionChanged" SelectedItem="{Binding SelectedProperty,Mode=TwoWay}" >
        <ListBox.ItemContainerStyle>
            <Style TargetType="ListBoxItem">
                <Style.Triggers>
                    <Trigger Property="IsSelected" Value="True" >
                        <Setter Property="FontWeight" Value="Bold" />
                        <Setter Property="Background" Value="#FFFFDC00" />
                        <Setter Property="Foreground" Value="Black" />
                    </Trigger>
                </Style.Triggers>
                <Style.Resources>
                    <SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="LightGray"/>
                </Style.Resources>
            </Style>
        </ListBox.ItemContainerStyle>
        <ListBox.ItemTemplate>
            <DataTemplate>
                <StackPanel Orientation="Horizontal">
                    <Image>
                        <Image.Style>
                            <Style TargetType="{x:Type Image}">
                                <Style.Triggers>
                                    <DataTrigger Binding="{Binding Checked}" Value="false">

                                    </DataTrigger>
                                    <DataTrigger Binding="{Binding Checked}" Value="true">

                                    </DataTrigger>
                                </Style.Triggers>
                            </Style>
                        </Image.Style>
                    </Image>

                    <TextBlock Text="{Binding  Path=Title, Mode=TwoWay}" />
                </StackPanel>
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>
    <TextBox x:Name="txtb_Selection" HorizontalAlignment="Left" Height="23" Margin="60,264,0,0" TextWrapping="Wrap" Text="TextBox" VerticalAlignment="Top" Width="120"/>

中的代码

public MainWindow()
    {
        InitializeComponent();
        List<LstB_Item> items = new List<LstB_Item>();
        items.Add(new LstB_Item() { Title = "Items 1", Checked = false });
        items.Add(new LstB_Item() { Title = "Items 2", Checked = false });
        items.Add(new LstB_Item() { Title = "Items 3", Checked = false });
        LstB_Checklist.ItemsSource = items;
    }

    public class LstB_Item : INotifyPropertyChanged
    {
        public string Title { get; set; }

        private bool _checked;

        public bool Checked
        {
            get { return _checked; }
            set { _checked = value; NotifyPropertyChanged(); }
        }

        public event PropertyChangedEventHandler PropertyChanged;
        private void NotifyPropertyChanged([CallerMemberName] string propertyName = "")
        {
            if (PropertyChanged != null)
                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }
    }

    private void LstB_Checklist_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        txtb_Selection.Text = LstB_Checklist.SelectedItem.ToString();
    }

正确填充了lisbox。我的问题是：获取值选择项的正确代码是什么。

非常感谢您的支持

Answer 1

我担心这个问题不是那么明确或答案明显，但我发了一个答案，这可能会有所帮助：

可能的答案：

var selected = LstB_Checklist.SelectedItem as LstB_Item;
txtb_Selection.Text = selected.Title;

列表框绑定获取所选项目值

1 个答案: