WPF案例展示 - 技术栈

WPF案例展示

苜柠2025-06-14 11:40

下拉框的数据绑定

枚举转换成对应的中文

设置数据上下文，设置数据源，设置数据格式转换器

复制代码

<UserControl.DataContext>
        <ViewModels:SelfViewModelAll />
</UserControl.DataContext>
<UserControl.Resources>
        <Model:SelfModelC x:Key="SelfModelC" d:IsDataSource="True"/>
        <DataTemplate x:Key="EnumItemTemplate">
            <TextBlock Text="{Binding Converter={StaticResource SelfModelC}}" />
        </DataTemplate>
</UserControl.Resources>

下拉框的设置：

复制代码

 <ComboBox Name="ModelChoose" 
          ItemsSource="{Binding ModelList //数据来源（链表）,diagnostics:PresentationTraceSources.TraceLevel=High}" //测试
          SelectedItem="{Binding SelectedModel, Mode=TwoWay}" //选择的项
          ItemTemplate="{StaticResource EnumItemTemplate}" //转换器
          HorizontalAlignment="Stretch" 
          VerticalAlignment="Stretch" Grid.Row="3" Grid.Column="1" 
          Height="25" />

注意ModelList必须为属性，写Get/set方法并且是Public类型，否则会找不到

复制代码

 public ObservableCollection<SelfModel> ModelList { get;  set ; } = new ObservableCollection<SelfModel>();
        private SelfModel _selectedModel;
        public SelfModel SelectedModel
        {
            get => _selectedModel;
            set => SetProperty(ref _selectedModel, value);
        }

        public SelfViewModelAll()
        {
            // 填充枚举值
            foreach (SelfModel type in Enum.GetValues(typeof(SelfModel)))
            {
                ModelList.Add(type);
            }
        }

枚举：

复制代码

 public enum SelfModel : int
    {
        A= 0,
        B,
        C,
    }

转换器：必须自己一个文档，否则写路径时找不到

复制代码

 public class SelfModelC : IValueConverter
    {

        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is SelfModel model)
            {
                switch (model)
                {
                    case SelfModel.A:
                        return "AA";
                    case SelfModel.C:
                        return "CC";
                    case SelfModel.B:
                        return "BB";
                    default:
                        return string.Empty;
                }
            }
            return string.Empty;
        }
        
        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }