Abp源码分析之虚拟文件系统Volo.Abp.VirtualFileSystem
前言Volo.Abp.VirtualFileSystem 是ABP（ASP.NET Boilerplate）框架中的一个重要组件，它提供了一种抽象文件系统的方式，使得应用程序可以轻松地访问和管理文件资源，无论这些资源是来自于物理文件系统、嵌入资源，还是远程存储。
通过Volo.Abp.VirtualFileSystem，开发者可以使用统一的接口来处理文件和目录，而不用关心这些文件和目录的实际存储位置。这使得应用程序更加灵活，可以轻松地切换不同的文件存储方式，而不用修改大量的代码。
新建mvc项目
引用以下nuget包
新建BookAppWebModule.cs
using Volo.Abp.Localization.ExceptionHandling;using Volo.Abp.Localization;using Volo.Abp.Modularity;using Volo.Abp.VirtualFileSystem;using Volo.Abp.Autofac;using Volo.Abp.AspNetCore.Mvc;using Volo.Abp;using Volo.Abp.AspNetCore.Mvc.Localization;using Microsoft.AspNetCore.Mvc.Razor;using Microsoft.Extensions.Hosting.Internal;using BookApp.Localization;using BookCategory;namespace BookApp{ public class BookAppWebModule: AbpModule { public override void PreConfigureServices(ServiceConfigurationContext context) { var hostingEnvironment = context.Services.GetHostingEnvironment(); var configuration = context.Services.GetConfiguration(); context.Services.PreConfigure<AbpMvcDataAnnotationsLocalizationOptions>(options => { options.AddAssemblyResource( typeof(BookStoreResource) ); }); } public override void ConfigureServices(ServiceConfigurationContext context) { var hostingEnvironment = context.Services.GetHostingEnvironment(); ConfigureVirtualFileSystem(hostingEnvironment); Configure<AbpLocalizationOptions>(options => { options.Languages.Add(new LanguageInfo("ar", "ar", "العربية")); options.Languages.Add(new LanguageInfo("cs", "cs", "Čeština")); options.Languages.Add(new LanguageInfo("en", "en", "English")); options.Languages.Add(new LanguageInfo("en-GB", "en-GB", "English (UK)")); options.Languages.Add(new LanguageInfo("hu", "hu", "Magyar")); options.Languages.Add(new LanguageInfo("fi", "fi", "Finnish")); options.Languages.Add(new LanguageInfo("fr", "fr", "Français")); options.Languages.Add(new LanguageInfo("hi", "hi", "Hindi")); options.Languages.Add(new LanguageInfo("it", "it", "Italiano")); options.Languages.Add(new LanguageInfo("pt-BR", "pt-BR", "Português")); options.Languages.Add(new LanguageInfo("ru", "ru", "Русский")); options.Languages.Add(new LanguageInfo("sk", "sk", "Slovak")); options.Languages.Add(new LanguageInfo("tr", "tr", "Türkçe")); options.Languages.Add(new LanguageInfo("zh-Hans", "zh-Hans", "简体中文")); options.Languages.Add(new LanguageInfo("zh-Hant", "zh-Hant", "繁體中文")); options.Languages.Add(new LanguageInfo("de-DE", "de-DE", "Deutsch")); options.Languages.Add(new LanguageInfo("es", "es", "Español")); options.Resources .Add<BookStoreResource>("en") .AddVirtualJson("/Localization/BookStore"); options.DefaultResourceType = typeof(BookStoreResource); }); } public override void OnApplicationInitialization(ApplicationInitializationContext context) { var app = context.GetApplicationBuilder(); var env = context.GetEnvironment(); app.UseAbpRequestLocalization(); if (env.IsDevelopment()) { app.UseDeveloperExceptionPage(); } app.UseHttpsRedirection(); app.UseStaticFiles(); app.UseRouting(); } private void ConfigureVirtualFileSystem(IWebHostEnvironment hostingEnvironment) { Configure<AbpVirtualFileSystemOptions>(options => { options.FileSets.AddEmbedded<BookAppWebModule>(); if (hostingEnvironment.IsDevelopment()) { options.FileSets.ReplaceEmbeddedByPhysical<BookAppWebModule>(hostingEnvironment.ContentRootPath); options.FileSets.ReplaceEmbeddedByPhysical<BookCategoryModule>(Path.Combine(hostingEnvironment.ContentRootPath, string.Format("..{0}BookCategory", Path.DirectorySeparatorChar))); } }); } }}修改Program.cs
using BookApp;using Microsoft.Extensions.DependencyInjection;var builder = WebApplication.CreateBuilder(args);builder.Host .AddAppSettingsSecretsJson() .UseAutofac();await builder.AddApplicationAsync<BookAppWebModule>();var app = builder.Build();await app.InitializeApplicationAsync();app.MapControllerRoute( name: "default", pattern: "{controller=Home}/{action=Index}/{id?}");await app.RunAsync();新建资源文件
新建BookCategory类库项目
新建BookCategoryModule.cs
using Volo.Abp.Localization;using Volo.Abp.Modularity;using Volo.Abp.VirtualFileSystem;using Volo.Abp;using Microsoft.Extensions.Hosting;using Microsoft.Extensions.DependencyInjection;using Volo.Abp.AspNetCore.Mvc;using BookApp.Localization;namespace BookCategory{ public class BookCategoryModule: AbpModule { public override void ConfigureServices(ServiceConfigurationContext context) { var hostingEnvironment = context.Services.GetHostingEnvironment(); var configuration = context.Services.GetConfiguration(); Configure<AbpVirtualFileSystemOptions>(options => { options.FileSets.AddEmbedded<BookCategoryModule>();//添加程序集到虚拟文件系统 if (hostingEnvironment.IsDevelopment()) { } }); Configure<AbpLocalizationOptions>(options => { options.Resources .Add<BookCategoryResource>("en") .AddVirtualJson("/Localization/BookCategory"); //这里必需添加，不然本地化时找不到相应的json文件 }); } public override void OnApplicationInitialization(ApplicationInitializationContext context) { } }}新建BookCategoryResource.cs
using Volo.Abp.Localization;namespace BookApp.Localization;public class BookCategoryResource{}新建资源文件
修改mvc项目的HomeController.cs中的Privacy方法
public IActionResult Privacy() { var resourcePath = "/Localization/BookCategory/en.json"; var fileInfo = _fileProvider.GetFileInfo(resourcePath); if (fileInfo.Exists) { using (var stream = fileInfo.CreateReadStream()) using (var reader = new StreamReader(stream)) { var content = reader.ReadToEnd(); return Content(content); } } return Content("Resource not found"); }此时我们就可以访问BookCategory类库中的资源文件
修改mvc项目中的视图Index.cshtml
@using Microsoft.Extensions.Localization@using Microsoft.AspNetCore.Mvc.Localization@using BookApp.Controllers@using BookApp.Localization@inject IHtmlLocalizer<BookStoreResource> HtmlLocalizer@inject IStringLocalizer<BookCategoryResource> StringLocalizer@{ ViewData["Title"] = "Home Page";}<div>string: @StringLocalizer["AppName"]</div><div>html: @HtmlLocalizer["AppName"]</div>IStringLocalizer StringLocalizer 这里就可以读取BookCategory类库中的资源文件
作者
吴晓阳（手机：13736969112微信同号）
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