.NET 5升级.NET 6后Azure部署wwwroot路径错误求助

将Web应用从.NET 5升级至.NET 6，部署到Azure后出现wwwroot文件夹找不到的问题，异常信息显示的是开发环境的路径。在.NET 5中该路径会被动态处理为当前文件夹，尝试多种方法均无效，求助遗漏了什么以及修复方案。

异常信息

System.IO.DirectoryNotFoundException: C:\vsts\rs_source\Lakemedelshantering\LakemedelshanteringApi\LakemedelshanteringApi\wwwroot
at Microsoft.Extensions.FileProviders.PhysicalFileProvider..ctor(String root, ExclusionFilters filters)
at Microsoft.Extensions.FileProviders.PhysicalFileProvider..ctor(String root)
at Microsoft.AspNetCore.Hosting.StaticWebAssets.StaticWebAssetsLoader.<>c.b__1_0(String contentRoot)
at Microsoft.AspNetCore.StaticWebAssets.ManifestStaticWebAssetFileProvider..ctor(StaticWebAssetManifest manifest, Func`2 fileProviderFactory)
at Microsoft.AspNetCore.Hosting.StaticWebAssets.StaticWebAssetsLoader.UseStaticWebAssetsCore(IWebHostEnvironment environment, Stream manifest)
at Microsoft.AspNetCore.Hosting.StaticWebAssets.StaticWebAssetsLoader.UseStaticWebAssets(IWebHostEnvironment environment, IConfiguration configuration)
at Microsoft.AspNetCore.WebHost.<>c.b__9_0(WebHostBuilderContext ctx, IConfigurationBuilder cb)
at Microsoft.AspNetCore.Hosting.GenericWebHostBuilder.<>c__DisplayClass9_0.b__0(HostBuilderContext context, IConfigurationBuilder builder)
at Microsoft.Extensions.Hosting.HostBuilder.BuildAppConfiguration()
at Microsoft.Extensions.Hosting.HostBuilder.Build()
at LakemedelshanteringApi.Program.Main(String[] args) in C:\vsts\rs_source\Lakemedelshantering\LakemedelshanteringApi\LakemedelshanteringApi\Program.cs:line 17

Program.cs代码

public static void Main(string[] args) 
{
    CreateHostBuilder(args).Build().Run();         
}  
  
public static IHostBuilder CreateHostBuilder(string[] args) => Host.CreateDefaultBuilder(args).ConfigureWebHostDefaults(webBuilder =>             
{   
    webBuilder.UseContentRoot(Directory.GetCurrentDirectory());
    webBuilder.ConfigureAppConfiguration((hostingContext, config) =>   
        {   
            config.SetBasePath(Directory.GetCurrentDirectory());  
            config.AddJsonFile("appsettings.json", optional: false, reloadOnChange: true);
            config.AddEnvironmentVariables(); 
            config.Build();
        });  
       webBuilder.UseStartup<Startup>();   
   });
}

这个问题核心是.NET 6对静态Web资产的处理逻辑变化，部署时错误加载了开发环境生成的静态资产清单，导致硬编码的本地路径被带入生产环境。以下是具体修复步骤：

• 仅在开发环境启用静态Web资产
  修改Program.cs，添加环境判断，避免生产环境加载开发模式的静态资产配置：

  public static IHostBuilder CreateHostBuilder(string[] args) => 
      Host.CreateDefaultBuilder(args)
          .ConfigureWebHostDefaults(webBuilder =>             
          {   
              webBuilder.UseContentRoot(Directory.GetCurrentDirectory());
              webBuilder.ConfigureAppConfiguration((hostingContext, config) =>   
              {   
                  config.SetBasePath(Directory.GetCurrentDirectory());  
                  config.AddJsonFile("appsettings.json", optional: false, reloadOnChange: true);
                  config.AddEnvironmentVariables(); 
              });
              // 仅开发环境启用静态Web资产加载
              webBuilder.ConfigureServices((context, services) =>
              {
                  if (context.HostingEnvironment.IsDevelopment())
                  {
                      StaticWebAssetsLoader.UseStaticWebAssets(context.HostingEnvironment, context.Configuration);
                  }
              });
              webBuilder.UseStartup<Startup>();   
          });
  

• 清理残留文件并重新发布
  删除项目根目录下的obj和bin文件夹，避免残留开发环境的清单文件；使用dotnet publish命令重新生成部署包，确保生产环境静态资产配置正确；重新部署到Azure覆盖原有文件。

• 检查Azure环境配置
  确认Azure App Service的应用设置中，ASPNETCORE_ENVIRONMENT值为Production；检查部署包内是否包含wwwroot文件夹，确保静态文件已被正确打包。

• 简化冗余配置
  .NET 6的CreateDefaultBuilder已经默认处理了ContentRoot和BasePath的设置，可移除代码中重复的UseContentRoot和SetBasePath调用，减少配置出错概率。

内容的提问来源于stack exchange，提问作者Carl-Johan Uhlin