数据绑定组合框中的本地化无法正常工作

发布于 2024-12-06 16:29:11 字数 1100 浏览 1 评论 0原文

我想翻译我的组合框中的项目。因此，我使用个性化转换器 KeyToTranslationConverter 将枚举值转换为翻译后的字符串。

[ValueConversion(typeof(object), typeof(string))]
public class KeyToTranslationConverter : IValueConverter
{
    public object Convert(object value, Type targetType, 
                                  object parameter, CultureInfo culture)
    {
        return LocalizationResourcesManager.GetTranslatedText(value);
    }
}

我的组合框绑定到可观察集合 LanguagesEntries，selectItem 绑定到 LanguageEntry 属性。

<ComboBox ItemsSource="{Binding LanguageEntries}" 
              SelectedItem="{Binding LanguageEntry}">
    <ComboBox.ItemTemplate>
        <DataTemplate>
            <Label Content="{Binding Converter={StaticResource Converter}}"/>
        </DataTemplate>
    </ComboBox.ItemTemplate>
</ComboBox>

我的问题是：当用户更改语言时，将调用该方法：

CollectionViewSource.GetDefaultView(this.LanguageEntries).Refresh();

除了重复的所选项目之外，所有项目集合都将被翻译：

例如，所选项目“Anglais”不会被翻译，但单词英语位于组合框列表中。

有人可以帮助我吗？

阿诺。

原文

I want to translate items of my combo box.
So I use a personalized converter KeyToTranslationConverter which convert an Enum value to a translated string.

[ValueConversion(typeof(object), typeof(string))]
public class KeyToTranslationConverter : IValueConverter
{
    public object Convert(object value, Type targetType, 
                                  object parameter, CultureInfo culture)
    {
        return LocalizationResourcesManager.GetTranslatedText(value);
    }
}

My combo box is bound to the observable collection LanguagesEntries and the selectItem is bound to LanguageEntry attribute.

<ComboBox ItemsSource="{Binding LanguageEntries}" 
              SelectedItem="{Binding LanguageEntry}">
    <ComboBox.ItemTemplate>
        <DataTemplate>
            <Label Content="{Binding Converter={StaticResource Converter}}"/>
        </DataTemplate>
    </ComboBox.ItemTemplate>
</ComboBox>

My problem is:
When the user change the language the method is called :

CollectionViewSource.GetDefaultView(this.LanguageEntries).Refresh();

All items collections are translated except the selected item which is duplicated :

For example the selected item "Anglais" is not translated but the word English is in the combo box list.

Can someone help me.

Arnaud.

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从来不烧饼 2024-12-13 16:29:11

我遇到了这个问题，我通过将转换器绑定到 itemssource 而不是 itemtemplate 来解决它。

<ComboBox ItemsSource="{Binding LanguageEntries, Converter={StaticResource LanguageEntriesConverter}}">

并且转换需要处理集合而不是每个项目：

    public object Convert(object value, Type targetType, object parameter, string language)
    {
        if (value is System.Collections.ObjectModel.Collection<string>)
        {
            foreach (var c in (System.Collections.ObjectModel.Collection<string>)value)
            {
                c = LocalizationResourcesManager.GetTranslatedText(c);
            }
        }
        return value;
    }

每次更新项目源时都会调用转换器，方法是将其分配给新值或调用 OnPropertyChanged。

I had this exact problem, I solved it by binding the converter to the itemssource instead of the itemtemplate.

<ComboBox ItemsSource="{Binding LanguageEntries, Converter={StaticResource LanguageEntriesConverter}}">

And the convert need to handle the collection instead of each item:

    public object Convert(object value, Type targetType, object parameter, string language)
    {
        if (value is System.Collections.ObjectModel.Collection<string>)
        {
            foreach (var c in (System.Collections.ObjectModel.Collection<string>)value)
            {
                c = LocalizationResourcesManager.GetTranslatedText(c);
            }
        }
        return value;
    }

The converter is called every time you update your itemssource either by assigning it to a new value or calling OnPropertyChanged.

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