.net-core - .NET 5.0 Blazor IStringLocalizer 和区分大小写

Question

我正在使用 IStringLoclizer使用 resx 的方法包含键值对的文件，用于本地化我的应用程序，如 the documentation 中所述.

我刚刚发现:

一方面.resx文件大小写不敏感(存储 key Firstname 和 FirstName 将引发 key 已存在的错误)。

另一方面，当我想检索键时，它是区分大小写(如果键 Firstname 存在并且我想获取 FirstName 的值，则值为未被 IStringLoclizer 检索 - 从键值对的角度来看这是有意义的!)。

有没有办法覆盖 IStringLocalizer setter/getter ，以实现一些逻辑(例如，将所有键更改为小写，并按小写搜索任何键)？有效解决方案的关键是避免更改 .resx 中的所有键。文件和我称之为 IStringLocalizer 的任何地方.

编辑我发现了 ResourceManager.IgnoreCase here , 但我不清楚如何访问资源管理器 - 可能必须在 Startup.cs 中完成不知何故？

Answer 1

这可以通过覆盖 ResourceManagerStringLocalizerFactory 来实现。

public class CaseInsensitiveResourceManagerStringLocalizerFactory : ResourceManagerStringLocalizerFactory
    {
        public CaseInsensitiveResourceManagerStringLocalizerFactory(IOptions<LocalizationOptions> localizationOptions, ILoggerFactory loggerFactory) : base(localizationOptions, loggerFactory)
        {
        }

        //unfortunately we need to use reflection to the the ResourceManager as the field is private 
        private readonly FieldInfo _field = typeof(ResourceManagerStringLocalizer).GetField("_resourceManager", BindingFlags.NonPublic | BindingFlags.Instance);

        //override this method to access the resource manager at the time it is created
        protected override ResourceManagerStringLocalizer CreateResourceManagerStringLocalizer(Assembly assembly, string baseName)
        {
            //call the base method to get the localizer, I would like to override this implementation but the fields used in the construction are private
            var localizer = base.CreateResourceManagerStringLocalizer(assembly, baseName);
            if (_field == null) return localizer;
            //set the resource manager to ignore case
            if (_field.GetValue(localizer) is ResourceManager resourceManager) resourceManager.IgnoreCase = true;
            return localizer;
        }
    }

您需要在添加本地化之前注册工厂。

public void ConfigureServices(IServiceCollection services)
        {
            services.AddSingleton<IStringLocalizerFactory, CaseInsensitiveResourceManagerStringLocalizerFactory>();
            services.AddLocalization(options => { options.ResourcesPath = "Resources"; });

            //other service configurations....
    }

我希望将来这些类更具可扩展性。 ResourceManagerStringLocalizerFactory 和 ResourceManagerStringLocalizer 中的私有(private)字段需要反射。