从 .NET Framework 应用程序启动 AspNetCore 托管

Question

所以我有一个 .NET 4.6.1 应用程序，它使用 Topshelf 作为 Windows 服务运行，我还有一个 ASP.NET Core Web 应用程序（MVC 和 API），它当前作为服务运行并将自身托管在使用Microsoft.AspNetCore.Hosting 和Microsoft.AspNetCore.Hosting.WindowsServices 拥有自己的进程。我想要实现的是，我可以从 .NET 应用程序中启动 AspNetCore Hosting，所以我只有一个进程。

但是，当我使用此代码尝试时：

bool isService = true;
if(Debugger.IsAttached || args.Contains("--console"))
{
    isService = false;
}

var pathToContentRoot = Directory.GetCurrentDirectory();
if(isService)
{
    var pathToExe = Process.GetCurrentProcess().MainModule.FileName;
    pathToContentRoot = Path.GetDirectoryName(pathToExe);
}

var host = new WebHostBuilder()
.UseKestrel()
.UseContentRoot(pathToContentRoot)
.UseIISIntegration()
.UseStartup<Startup>()
.UseApplicationInsights()
.Build();

host.Run();

我遇到了很多错误。起初我以为是因为使用了不同的目标 .net 平台，但是即使将两者都调整到 4.6.1 并将 asp.net 核心 nugets 更新到最新版本，它仍然会输出这些错误（这就像 1/ 30的原始长度错误）：

    fail: Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware[1]
          An unhandled exception has occurred while executing the request.
    Microsoft.AspNetCore.Mvc.Razor.Compilation.CompilationFailedException: One or more compilation failures occurred:
    imlmfapg.yxl(4,41): error CS0234: The type or namespace name 'Razor' does not exist in the namespace 'Microsoft.AspNetCore' (are you missing an assembly reference?)
    imlmfapg.yxl(5,62): error CS0012: The type 'Attribute' is defined in an assembly that is not referenced. You must add a reference to assembly 'netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'.
    imlmfapg.yxl(4,82): error CS0518: Predefined type 'System.Type' is not defined or imported
    imlmfapg.yxl(4,118): error CS0518: Predefined type 'System.String' is not defined or imported
    imlmfapg.yxl(4,135): error CS0518: Predefined type 'System.String' is not defined or imported
    imlmfapg.yxl(5,81): error CS0518: Predefined type 'System.String' is not defined or imported
    imlmfapg.yxl(5,109): error CS0518: Predefined type 'System.Type' is not defined or imported
    imlmfapg.yxl(5,11): error CS0518: Predefined type 'System.Void' is not defined or imported
    imlmfapg.yxl(9,11): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?)
    imlmfapg.yxl(10,11): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?)
    imlmfapg.yxl(11,11): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?)
    imlmfapg.yxl(12,11): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?)
    imlmfapg.yxl(15,36): error CS0234: The type or namespace name 'ViewFeatures' does not exist in the namespace 'Microsoft.AspNetCore.Mvc' (are you missing an assembly reference?)
    imlmfapg.yxl(26,35): error CS0234: The type or namespace name 'Razor' does not exist in the namespace 'Microsoft.AspNetCore' (are you missing an assembly reference?)
    imlmfapg.yxl(27,35): error CS0234: The type or namespace name 'Razor' does not exist in the namespace 'Microsoft.AspNetCore' (are you missing an assembly reference?)

更新：

因此，对于每个尝试做我所做的事情的人来说，通过将 Web 项目托管在控制台项目之外（两者都针对 .NET FW 4.6.1）。看来这不起作用的原因是在编译时，当 ASP 尝试使用 razor 呈现页面时，它无法以正确的方式解析名称空间，因此无法找到要使用的正确 DLL。另一种方式很好。通过简单地运行 aspnet 核心项目的其他功能，使用控制台和自托管。

Answer 1

也许尝试像这样在 web.config 中添加 netstandard 参考：

<system.web> 
<compilation debug="true" targetFramework="4.7.1" > <assemblies> <add `assembly="netstandard, Version=2.0.0.0, Culture=neutral,` PublicKeyToken=cc7b13ffcd2ddd51"/> </assemblies> </compilation> <httpRuntime targetFramework="4.7.1" />