.net core3.1 mvc視圖運行時編譯

有時為了方便調試，當修改cshtml文件時，不需要重新編譯，操作方法如下

• 如果是新項目，在創建項目時“啟用Razor運行時編譯”打勾即可　　

　　

 

• 如果是現有項目

　　方法1（原理同上）：

　　1.項目右鍵->編輯項目文件：

<Project Sdk="Microsoft.NET.Sdk.Web">
  <PropertyGroup>
    <TargetFramework>netcoreapp3.1</TargetFramework>
    <CopyRefAssembliesToPublishDirectory>false</CopyRefAssembliesToPublishDirectory>
  </PropertyGroup>
  <ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation" Version="3.1.3" />
  </ItemGroup>
</Project>

　　2.launchSettings.json

  "profiles": {
    "IIS Express": {
      "commandName": "IISExpress",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development",
        "ASPNETCORE_HOSTINGSTARTUPASSEMBLIES": "Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation"
      }
    },
    "WebApplication4": {
      "commandName": "Project",
      "launchBrowser": true,
      "applicationUrl": "http://localhost:5000",
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development",
        "ASPNETCORE_HOSTINGSTARTUPASSEMBLIES": "Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation"
      }
    }
  }

  

 方法2：

1.編輯項目文件如下

<Project Sdk="Microsoft.NET.Sdk.Web">
  <PropertyGroup>
    <TargetFramework>netcoreapp3.1</TargetFramework>
  </PropertyGroup>
  <ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation" Version="3.1.3" Condition="'$(Configuration)' == 'Debug'" />
  </ItemGroup>
</Project>

2.修改startp.cs文件　　

    public class Startup
    { 
        public Startup(IConfiguration configuration, IWebHostEnvironment env)
        {
            Configuration = configuration;
            Env = env;
        }
        public IWebHostEnvironment Env { get; set; }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
 IMvcBuilder mvcBuilder = services.AddControllersWithViews();
#if DEBUG
            if (Env.IsDevelopment())
                mvcBuilder.AddRazorRuntimeCompilation(); 
#endif
        }

 

最后：以上無論哪種方法都加上這個條件后，會使用發布后的文件夾比較干凈

<PackageReference Include="Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation" Version="3.1.3" Condition="'$(Configuration)' == 'Debug'" />

未添加 Condition="'$(Configuration)' == 'Debug'"

添加 Condition="'$(Configuration)' == 'Debug'"后：