Windows store app ResourceLoader at design time

问题

I've started creating a Windows Store App for Windows 8.1 and now I encountered a problem concerning localization.

I would like to display a string resource from a .resw file at design time, but every attempt to do so has failed, even though it works at runtime.

When using the x:Uid attribute, I still have to supply the Text property (i.e. for a TextBlock) and I don't like to write the text twice.

I also tried creating a property for the string on the viewmodel:

public string Title
{
    get { return ResourceLoader.GetForCurrentView("Strings").GetString("MainView_Title"); }
}

This is working at runtime, but at design time it is blank.

So the question is, is there a way to display resources from a .resw file in the XAML-designer?

More specifically, does the ResourceManager class allow .resw files to be read at design time?

Thanks for your help, Lucas

回答1:

Old Method

So, there are a couple of things you can do.

The first (and simplest, given that you're using x:Uid already) is to just supply the text into the Text field. The x:Uid-related value will overwrite whatever is in there.

<TextBlock Text="MyText" x:Uid="MainView_Title"/>

The second method is to use the property like you already have, and then check to see if the app is in Design Time (through a couple of different methods), then return a constant value if it is and the Resource if it is not.

public string Title
{
     if(ViewModelBase.IsInDesignTimeStatic) //Mvvm Light's easy accessor
         return "My Text";
     return ResourceLoader.GetForCurrentView("Strings").GetString("MainView_Title");
}

Hope this helps and happy coding!

Edit: There appears to be a new way to do this, at least as of Windows 8.1.

New Method

Create a class which references a ResourceLoader (similar to the property described above).

Create an indexed property accessor which accepts a string key and return the value from the ResourceLoader.

public class LocalizedStrings
{
    public string this[string key]
    {
        get
        {
            return App.ResourceLoader.GetForViewIndependentUse().GetString(key);
        }
    }
}

In your App.xaml, define a StaticResource of this type.

<Application.Resources>
    <ResourceDictionary>
        <common:LocalizedStrings x:Key="Localized"/>
    </ResourceDictionary>
</Application.Resources>

Now, when you want to access your property with entry key MainView_Title, use this. It's more verbose, but it should translate both in the designer and in the app itself.

<TextBlock Text="{Binding Source={StaticResource Localized}, Path=[MainView_Title]}" />

You can shuffle it around to be a bit more readable if you'd like, such as:

<TextBlock Text="{Binding [MainView_Title], Source={StaticResource Localized}}" />

回答2:

This is an old thread, but since Nate provided such an elegant solution to the problem for Win8.1 I figured I'd ask here...

After much investigation and experimentation, Nate's solution does not appear to work for UWP apps for Win10 under VS2017 Community. The LocalizedString approach works just fine at runtime, but it appears

App.ResourceLoader.GetForViewIndependentUse().GetString(key);

refuses to return anything except String.Empty during design time. I've done a lot of experimenting and things like

ResourceContext.GetForViewIndependentUse().QualifierValues

Seem to be identical between runtime (working) and design time (not working).

I was wondering if anyone has encountered this and solved it. Nate? :)

来源：https://stackoverflow.com/questions/20004634/windows-store-app-resourceloader-at-design-time

标签

xaml

windows-store-apps

embedded-resource

designer