问题描述
我有一个绑定到枚举的 WPF 组合框,如下所示:
I have a WPF combobox that is bound to an enum like this:
<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>
我绑定到的枚举具有描述属性,如下所示:
The enum that I'm binding to has description attributes and looks like this:
public enum CityNamesEnum
{
[Description("New York City")]
NewYorkCity,
[Description("Chicago")]
Chicago,
[Description("Los Angeles")]
LosAngeles
}
我并不总是想显示每个枚举值.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 hidden 但由于它们是枚举值,我不确定这是否可行.有人知道吗?
I don't always want to display each enum value. Is it possible to toggle the visibility of one or more of the enum values? If these were ComboBoxItems, I think I could simply set the .Visibility property to hidden but since they're enum values, I'm not sure if this is possible. Does anyone know?
推荐答案
为什么不创建一个普通的 C# 方法来为您进行过滤,然后让 ObjectDataProvider 指向该方法
Why not just create a normal C# method which does the filtering for you and then have the ObjectDataProvider point to that method instead
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>
这篇关于将 WPF ComboBox 绑定到枚举并隐藏某些值的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!