asp.net 没有 mvc 的核心 2.0 razor web 应用程序中的本地化

localization in asp.net core 2.0 razor web application without mvc

我找到的每个示例,包括 https://docs.microsoft.com/en-us/aspnet/core/fundamentals/localization?view=aspnetcore-2.1 上有关本地化的 Microsoft 官方文档,都使用控制器来执行设置和保存所需文化的操作。我的 ASP.NET Core 2.1 网络应用程序不是 MVC,因此没有控制器。我已经尝试了几种方法来解决这个问题,包括向我的项目添加一个虚拟控制器,但我仍然无法让 Culture 开关起作用。

My Startup class Configure 方法包含以下代码:

            var supportedCultures = new[]
        {
            new CultureInfo("en-US"),
            new CultureInfo("hi-IN")
        };

        app.UseRequestLocalization(new RequestLocalizationOptions
        {
            DefaultRequestCulture = new RequestCulture(DefaultCulture.Name),
            // Formatting numbers, dates, etc.
            SupportedCultures = supportedCultures,
            // UI strings that we have localized.
            SupportedUICultures = supportedCultures
        });
        app.UseHttpsRedirection();
        app.UseAuthentication();
        app.UseStaticFiles();
        app.UseCookiePolicy();
        app.UseMvc();

ConfigureServices 方法包含此代码:

            // Add the localization services to the services container
        services.AddLocalization(options => options.ResourcesPath = "Resources");

        // Add MVC Services to the Services Collection.
        services.AddMvc()
            // Add support for finding localized views, based on file name suffix, e.g. Index.fr.cshtml
            .AddViewLocalization(LanguageViewLocationExpanderFormat.Suffix)
            // Add support for localizing strings in data annotations (e.g. validation messages) via the
            // IStringLocalizer abstractions.
            .AddDataAnnotationsLocalization();

        // Configure supported cultures and localization options
        var supportedCultures = new[]
        {
            new CultureInfo("en-US"),
            new CultureInfo("hi-IN")
        };

        services.Configure<RequestLocalizationOptions>(options =>
        {
            // State what the default culture for your application is. This will be used if no specific culture
            // can be determined for a given request.
            options.DefaultRequestCulture = new RequestCulture(DefaultCulture.Name, DefaultCulture.Name);

            // You must explicitly state which cultures your application supports.
            // These are the cultures the app supports for formatting numbers, dates, etc.
            options.SupportedCultures = supportedCultures;

            // These are the cultures the app supports for UI strings, i.e. we have localized resources for.
            options.SupportedUICultures = supportedCultures;
        });

        // Register the email service used for "contacts".
        services.AddSingleton<IEmailSender, EmailSender>();

        // Configure startup to use the SendGrid options.
        services.Configure<AuthMessageSenderOptions>(Configuration);

        // Add cross-origin resource sharing services to the specified IServiceCollection.
        //
        // The Policy specifed as an option will allow any method.
        services.AddCors(options => options.AddPolicy("CorsPolicy", b => b.AllowAnyMethod()));

DefaultCulture 是:

DefaultCulture = new CultureInfo(Configuration["Localization:DefaultCulture"]); 

其中设置文件包含字符串 "en-US"。

然后我使用本地化文档示例中的 _SelectLanguagePartial.cshtml 代码:

<div title="@Localizer["Request culture provider:"] @requestCulture?.Provider?.GetType().Name">
<form id="selectLanguage" asp-controller="Home" 
      asp-action="SetLanguage" asp-route-returnUrl="@returnUrl" 
      method="post" class="form-horizontal" role="form">
    <label asp-for="@requestCulture.RequestCulture.UICulture.Name">@Localizer["Language:"]</label> 
    <select name="culture" onchange="this.form.submit();" asp-for="@requestCulture.RequestCulture.UICulture.Name" asp-items="cultureItems"></select>
</form>

首先,没有Controller。我如何才能在非 MVC ASP.NET 核心 Web 应用程序中实现此功能?

您不必使用控制器,最近我发布了一个 step-by-step 教程,使用 ASP.NET Core Razor Pages 开发多文化 Web 应用程序;你可以在这里找到它:

http://www.ziyad.info/en/articles/10-Developing_Multicultural_Web_Application

我使用了路由值方法,但您可以扩展它以使用查询字符串、cookie 或接受的 header 值来进行区域性选择。

在网站上,您可以在 github 上看到现场演示和项目源代码 link。

此外,您可能还需要检查本地化身份错误消息:

http://ziyad.info/en/articles/20-Localizing_Identity_Error_Messages

希望对您有所帮助:)

[更新]

我提供的示例使用的是共享资源文件。如果要使用与视图相关的资源文件方法,请在“Resources”文件夹中为每个 view/culture 创建资源文件,并保持资源的文件夹结构与其相关视图相似。

例如,如果我们在 pages 文件夹中有一个名为“MyView”的视图:

Pages/MyView.cshtml

资源文件应该如下所示:

Resources/Pages/MyView.tr-TR.resx

Resources/Pages/MyView.ar-SY.resx

Resources/Pages/MyView.hi-IN.resx

在视图中使用本地化注入 IViewLocalizer:

@using Microsoft.AspNetCore.Mvc.Localization    
@inject IViewLocalizer _loc

<h4>@_loc["My view title"]</h4>

并且对于 ViewModel/DataAnnotations,为每种文化创建另一个资源文件:

查看模型:

Pages/MyViewModel.cshtml.cs

资源文件名:

Resources/Pages/MyViewModel.tr-TR.resx

Resources/Pages/MyViewModel.ar-SY.resx

Resources/Pages/MyViewModel.hi-IN.resx

用相关模型填充资源文件属性显示名称和数据注释消息,然后通过清除DataAnnotations的共享资源代码修改startup.cs文件并保持无参数:

services.AddMvc()
                .SetCompatibilityVersion(CompatibilityVersion.Version_2_1)
                .AddViewLocalization(o=>o.ResourcesPath = "Resources")
                
                // Option A: use this for localization with shared resource
                /*
                .AddDataAnnotationsLocalization(o=> {
                    var type = typeof(ViewResource);
                    var assemblyName = new AssemblyName(type.GetTypeInfo().Assembly.FullName);
                    var factory = services.BuildServiceProvider().GetService<IStringLocalizerFactory>();
                    var localizer = factory.Create("ViewResource", assemblyName.Name);
                    o.DataAnnotationLocalizerProvider = (t, f) => localizer;
                })
                */

                // Option B: use this for localization by view specific resource
                .AddDataAnnotationsLocalization() 

                .AddRazorPagesOptions(o => {
                    o.Conventions.Add(new CultureTemplateRouteModelConvention());
                });

顺便说一句,我更新了 GitHub 示例,现在它包含使用视图特定资源文件本地化的“AnotherPage”视图。