如何在 asp.net core 中即时编译代码？

Question

我使用 Visual Studio 2015 在 asp.net 核心中创建一个应用程序。（.net 核心版本：1.0.1）当我对 cs 文件进行任何更改然后保存文件并刷新浏览器时，我的代码更改未反映在浏览器。那么我怎样才能获得动态的代码反射呢？

project.json

{
  "compilationOptions": {
  "emitEntryPoint": true
},
  "dependencies": {
    "Microsoft.NETCore.App": {
      "version": "1.0.1",
      "type": "platform"
    },
    "Microsoft.AspNetCore.Diagnostics": "1.0.0",
    "Microsoft.AspNetCore.Mvc": "1.0.1",
    "Microsoft.AspNetCore.Razor.Tools": {
      "version": "1.0.0-preview2-final",
      "type": "build"
    },
    "Microsoft.AspNetCore.Routing": "1.0.1",
    "Microsoft.AspNetCore.Server.IISIntegration": "1.0.0",
    "Microsoft.AspNetCore.Server.Kestrel": "1.0.1",
    "Microsoft.AspNetCore.StaticFiles": "1.0.0",
    "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0",
    "Microsoft.Extensions.Configuration.Json": "1.0.0",
    "Microsoft.Extensions.Logging": "1.0.0",
    "Microsoft.Extensions.Logging.Console": "1.0.0",
    "Microsoft.Extensions.Logging.Debug": "1.0.0",
    "Microsoft.Extensions.Options.ConfigurationExtensions": "1.0.0",
    "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0",
    //"Microsoft.VisualStudio.Web.CodeGenerators.Mvc": "1.0.0-preview2-final",
    //"Microsoft.VisualStudio.Web.CodeGeneration.Tools": "1.0.0-preview2-final",
    "Microsoft.VisualStudio.Web.CodeGenerators.Mvc": {
      "version": "1.0.0-preview2-final",
      "type": "build"
    },
    "Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
      "version": "1.0.0-preview2-final",
      "imports": [
        "portable-net45+win8"
      ]
    },

    //Database Provider for EF Core
    "Microsoft.EntityFrameworkCore.SqlServer": "1.0.1",
    //EF Core Package Manager Console Tools
    //"Microsoft.EntityFrameworkCore.Tools": "1.0.0-preview2-final",
    //EF Core Funtionality for MSSQL Server
    "Microsoft.EntityFrameworkCore.SqlServer.Design": "1.0.1",
    "Microsoft.EntityFrameworkCore.Design": "1.0.0-preview2-final"
  },

  "tools": {
    "BundlerMinifier.Core": "2.0.238",
    "Microsoft.AspNetCore.Razor.Tools": "1.0.0-preview2-final",
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final",
    "Microsoft.DotNet.Watcher.Tools": {
      // "version": "1.0.0-preview2-final",
        "version": "1.0.0-*",
      "imports": "portable-net451+win8"
    },

    "Microsoft.EntityFrameworkCore.Tools": {
      "version": "1.0.0-preview2-final",
      "imports": [
        "portable-net45+win8+dnxcore50",
        "portable-net45+win8"
      ]
    },
    "Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
      "version": "1.0.0-preview2-final",
      "imports": [
        "portable-net45+win8"
      ]
    }


  },

  "frameworks": {
    "netcoreapp1.0": {
      "imports": [
        "dotnet5.6",
        "portable-net45+win8"
      ]
    }
  },

  "buildOptions": {
    "emitEntryPoint": true,
    "preserveCompilationContext": true,
    "debugType": "portable"
  },
  "runtimes": {
    "win10-x64": {},
    "osx.10.10-x64": {},
    "ubuntu.14.04-x64": {}
  },
  "runtimeOptions": {
    "configProperties": {
      "System.GC.Server": true
    }
  },

  "publishOptions": {
    "include": [
      "wwwroot",
      "**/*.cshtml",
      "appsettings.json",
      "web.config"
    ]
  },

  "scripts": {
    "prepublish": [ "bower install", "dotnet bundle" ],
    "postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
  }
}

Answer 1

真的没有“即时编译代码”这样的东西。

微软提供的唯一方法是在更改文件时重新编译整个项目/程序集。这可以通过dotnet watch run 完成。这是一个监视文件系统更改的工具（做得很差），然后关闭 dotnet 进程并重新运行 dotnet start 以再次启动该进程。

我不得不说这是非常缓慢的，不可能在大型项目中使用。

我的建议是实现你自己的观察者。而是每次都将其构建到不同的目录，因此您只能在成功构建项目后停止当前进程（并开始这个新的成功构建）。您可以使用简单的节点脚本或 python 脚本来做到这一点。

简单的脚本如下所示：

• 监视目录中 *.cs 文件的更改
• Watcher 包含一个运行 dotnet build -o /TempDir 的回调
• 在此过程给出退出代码 0 后（表示成功）
  • 杀死旧进程
  • 运行dotnet run /Tempdir/your.dll 启动新进程