带有json文件的Asp.net Core本地化 [英] Asp.net Core localization with json files

问题描述

我正在尝试找到一个很好的有关asp.net本地化的教程. 在官方文档中，解释是关于 .resx 文件的，我想使用json文件.

I'm trying to find a good tutorial about asp.net localization. In the official documentation, the explanation are about .resx files and I want to use json files.

如果有人有一个很好的教程，说明如何编写中间件来做到这一点.

If someone have a good tutorial on how to write the middleware to do that.

谢谢

推荐答案

Nutt软件包

https://www.nuget.org/packages/Askmethat.Aspnet.JsonLocalizer /

解决方案

经过一些调查，我终于在Asp/Localization GitHub中找到一个示例.

After some investigations, I finally find an example in Asp/Localization GitHub.

我在这里为不使用默认json的情况下不使用平面json的人提供

I provide here for people that wan't to use a flat json without breaking default culture provider.

数据:

平面json:

[
  {
    "Key": "Hello",
    "LocalizedValue" : {
      "fr-FR": "Bonjour",
      "en-US": "Hello"
    }
  }
]

C#模型:

class JsonLocalization
    {
        public string Key { get; set; }
        public Dictionary<string, string> LocalizedValue = new Dictionary<string, string>();

    }

中间件

工厂

这只是要访问CultureInfo的StringLocalizer.

 public class JsonStringLocalizerFactory : IStringLocalizerFactory
    {
        public IStringLocalizer Create(Type resourceSource)
        {
            return new JsonStringLocalizer();
        }

        public IStringLocalizer Create(string baseName, string location)
        {
            return new JsonStringLocalizer();
        }
    }

本地化程序

从JSON文件获取数据的逻辑

public class JsonStringLocalizer : IStringLocalizer
{
    List<JsonLocalization> localization = new List<JsonLocalization>();
    public JsonStringLocalizer()
    {
        //read all json file
        JsonSerializer serializer = new JsonSerializer();
        localization = JsonConvert.DeserializeObject<List<JsonLocalization>>(File.ReadAllText(@"localization.json"));

    }


    public LocalizedString this[string name]
    {
        get
        {
            var value = GetString(name);
            return new LocalizedString(name, value ?? name, resourceNotFound: value == null);
        }
    }

    public LocalizedString this[string name, params object[] arguments]
    {
        get
        {
            var format = GetString(name);
            var value = string.Format(format ?? name, arguments);
            return new LocalizedString(name, value, resourceNotFound: format == null);
        }
    }

    public IEnumerable<LocalizedString> GetAllStrings(bool includeParentCultures)
    {
        return localization.Where(l => l.LocalizedValue.Keys.Any(lv => lv == CultureInfo.CurrentCulture.Name)).Select(l => new LocalizedString(l.Key, l.LocalizedValue[CultureInfo.CurrentCulture.Name], true));
    }

    public IStringLocalizer WithCulture(CultureInfo culture)
    {
        return new JsonStringLocalizer();
    }

    private string GetString(string name)
    {
        var query = localization.Where(l => l.LocalizedValue.Keys.Any(lv => lv == CultureInfo.CurrentCulture.Name));
        var value = query.FirstOrDefault(l => l.Key == name);
        return value.LocalizedValue[CultureInfo.CurrentCulture.Name];
    }
}

使用此解决方案，您可以在视图和控制器中使用基本的 IStringLocalizer .

With this solution you are able to use the basic IStringLocalizer in your Views and Controllers.

当然，如果您有一个很大的json文件，则可以使用 IMemoryCache 或 IDistributedMemoryCache 来提高性能.

Of course if you have a big json file, you can use IMemoryCache or IDistributedMemoryCache to improve performance.

在应用程序启动中，添加以下行以使用您自己的实现:

In the application Startup add this lines to use your own implementation :

services.AddSingleton<IStringLocalizerFactory, JsonStringLocalizerFactory>();
services.AddSingleton<IStringLocalizer, JsonStringLocalizer>();
services.AddLocalization(options => options.ResourcesPath = "Resources");

之后，您可以根据需要配置全球化首选项.

After that you can configure as you want your globalization preferences.

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