Xamarin - using binding and Translation - xamarin

Question

I try to create something like that:
<Label Text="{Binding oResult.hi, StringFormat='Hallo: {0}'}" />
And it works fine! But i wish that the String "Hallo" should get out from the resx file.
Like this:
<Entry Placeholder="{i18n:TranslateExtension Text=password}" IsPassword="true" />
Also i will do a combination of both.
Thank you!

Answer 1

You could achieve this with a simple markup extension and strings in resx files.
Xaml extension:
using System;
using Xamarin.Forms.Xaml;
using Xamarin.Forms;
using System.Resources;
namespace i18n
{
[ContentProperty("Key")]
public class TranslateExtension : IMarkupExtension
{
public string Key { get; set; }
static ResourceManager ResourceManagerInstance;
#region IMarkupExtension implementation
public static void Init(ResourceManager r){
ResourceManagerInstance = r;
}
public object ProvideValue(IServiceProvider serviceProvider)
{
if (ResourceManagerInstance == null)
{
throw new InvalidOperationException("Call TranslateExtension.Init(ResourceManager) in your App.cs");
}
return ResourceManagerInstance.GetString(this.Key);
}
#endregion
}
}
Example App.cs:
using Xamarin.Forms;
using i18n;
namespace ResourceLocalizationMarkup
{
public class App : Application
{
public App()
{
TranslateExtension.Init(Localization.Strings.ResourceManager);
MainPage = new NavigationPage(new MyPage());
}
}
}
Example Xaml:
<?xml version="1.0" encoding="UTF-8"?>
<ContentPage
xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:i18n="clr-namespace:i18n"
x:Class="ResourceLocalizationMarkup.MyPage">
<ContentPage.Content>
<StackLayout Orientation="Vertical">
<Label Text="{i18n:TranslateExtension hello_world}"/>
<Label Text="{Binding Name, StringFormat={i18n:TranslateExtension thanks_user}}"/>
</StackLayout>
</ContentPage.Content>
</ContentPage>