以真实项目为例，从.NET Core 2.2迁移到.NET Core 3.1

本文是对nopCommerce项目更新的逻辑延续，该项目是用于创建在线商店的免费开源CMS。上次我们讨论了将项目从ASP.NET MVC迁移到ASP.NET Core 2.2的经验。现在，我们将研究向.NET Core 3.1的迁移过程。鉴于对.Net Core 3.1的官方支持将持续到2022年12月，因此迁移主题非常重要。因此，如果您想获得更新框架的所有好处，紧跟技术创新并紧跟不断增长的全球趋势，那么该开始迁移了。

过渡到.NET Core 3.1期间必须解决哪些任务

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.NET Core 3.1

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Generic Host

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public class Program
{
    public static void Main(string[] args)
    {
        CreateHostBuilder(args).Build().Run();
    }

    public static IHostBuilder CreateHostBuilder(string[] args)
    {
        return Host.CreateDefaultBuilder(args)
            .UseServiceProviderFactory(new AutofacServiceProviderFactory())
            .ConfigureWebHostDefaults(webBuilder =>
            {
                webBuilder
                    .UseStartup<Startup>();
            });
    }
}

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global.json

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{
  "sdk": {
    "version": "3.1.201",
    "rollForward": "latestFeature",
    "allowPrerelease": false
  }
}

GitHub.

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ASP.NET Core Module V2

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<PropertyGroup>
    <TargetFramework>netcoreapp3.1</TargetFramework>
    <Copyright>Copyright (c) Nop Solutions, Ltd</Copyright>
    <Company>Nop Solutions, Ltd</Company>
    <Authors>Nop Solutions, Ltd</Authors>
    <Version>4.4.0.0</Version>
    <Description>Nop.Web is also an MVC web application project, a presentation layer for public store and admin area.</Description>
    <PackageLicenseUrl>https://www.nopcommerce.com/license</PackageLicenseUrl>
    <PackageProjectUrl>https://www.nopcommerce.com/</PackageProjectUrl>
    <RepositoryUrl>https://github.com/nopSolutions/nopCommerce</RepositoryUrl>
    <RepositoryType>Git</RepositoryType>
    <!--Set this parameter to true to get the dlls copied from the NuGet cache to the output of your project-->
    <CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>
    <AspNetCoreHostingModel>InProcess</AspNetCoreHostingModel>
    <!--When true, compiles and emits the Razor assembly as part of publishing the project-->
    <RazorCompileOnPublish>false</RazorCompileOnPublish>
  </PropertyGroup>

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Endpoint Routing

.NET Core 2.1 Middleware ( ASP.NET Core MVC) HTTP-. , , , , , MVC . .NET Core 2.2 , (Endpoints), .

.NET Core 3.1 Endpoint Routing , . middleware:

• EndpointRoutingMiddleware — , URL ,
• EndpointMiddleware —

, , , middleware , .

/// <summary>
/// Configure Endpoints routing
/// </summary>
/// <param name="application">Builder for configuring an application's request pipeline</param>
public static void UseNopEndpoints(this IApplicationBuilder application)
{
    //Add the EndpointRoutingMiddleware
    application.UseRouting();

    //Execute the endpoint selected by the routing middleware
    application.UseEndpoints(endpoints =>
    {
        //register all routes
        EngineContext.Current.Resolve<IRoutePublisher>().RegisterRoutes(endpoints);
    });
}

, .

GitHub.

# 8.0

.NET Core C# 8.0. . , , “ ”.

.

nopCommerce, , .. eCommerce .

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JMeter , . .

20% ( )

(Average) 13.7% ( )

, .. (throughput) 12.7% ( )

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.NET Core - . , , . .NET Core , . 13%. , , , . , , performance refactoring : .

, , , .NET Core , , .NET Core 3.1.0 ( 3.5.1) — security patch.

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将来，我们计划进一步更新nopCommerce应用程序，以添加.NET Core平台提供的越来越多的新功能。其中之一是使用System.Text.Json而不是Newtonsoft.Json的举动。这是一种处理JSON对象的性能更高，更安全，更标准化的方法。我们还计划实现和使用C＃8.0提供的尽可能多的功能。

您可以通过nopcommerce.com或访问GitHub上的存储库来了解有关我们项目的更多信息。