我有一个WPF组合框,它绑定到这样的枚举:
<Window.Resources>
<local:EnumDescriptionConverter x:Key="enumDescriptionConverter"/>
<ObjectDataProvider MethodName="GetValues" ObjectType="{x:Type sys:Enum}" x:Key="cityNamesDataProvider">
<ObjectDataProvider.MethodParameters>
<x:Type TypeName="local:MyModel+CityNamesEnum"/>
</ObjectDataProvider.MethodParameters>
</ObjectDataProvider>
</Window.Resources>
<ComboBox x:Name="cityNameComboBox" ItemsSource="{Binding Source={StaticResource cityNamesDataProvider}}" SelectionChanged="cityNameComboBox_SelectionChanged">
<ComboBox.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Converter={StaticResource enumDescriptionConverter}}"/>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
我绑定的枚举具有描述属性,如下所示:
public enum CityNamesEnum
{
[Description("New York City")]
NewYorkCity,
[Description("Chicago")]
Chicago,
[Description("Los Angeles")]
LosAngeles
}
我并不总是希望显示每个枚举值。是否可以切换一个或多个枚举值的可见性?如果这些是ComboBoxItems,我想我可以简单地将.Visibility属性设置为隐藏,但由于它们是枚举值,我不确定这是否可行。有谁知道吗?
答案 0 :(得分:7)
为什么不创建一个普通的C#方法,为您进行过滤,然后让ObjectDataProvider指向该方法呢
static method IEnumerable<CityNamesEnum> MyFilter() {
yield return CityNames.NewYorkCity;
yield return CityNames.Chicago;
}
XAML
<ObjectDataProvider
MethodName="MyFilter"
ObjectType="{x:Type local:TheType}"
x:Key="cityNamesDataProvider">
</ObjectDataProvider>