asp.net core-12.dotnet watch run 和attach到进程调试

1.打开visual studio code 创建一个项目 打开终端 输出：  dotnet new web --name hellocore

2.用visual studio code打开项目文件夹 输入dotnet run 运行 打开浏览器

如果在Startup文件里修改输出(Hello World!11111)，再去刷新浏览器，这里输出是不会变的，除非关掉调试再重新启动

 public class Startup
    {
        // This method gets called by the runtime. Use this method to add services to the container.
        // For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940
        public void ConfigureServices(IServiceCollection services)
        {
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.Run(async (context) =>
            {
                await context.Response.WriteAsync("Hello World!11111");
            });
        }
    }

　　

core中有一个工具DotNetWatcherRun可以改变在运行中修改输出

在helloCore.csproj文件中添加：<DotNetCliToolReference Include="Microsoft.DotNet.Watcher.Tools" Version="2.0.0" />

<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>netcoreapp2.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <Folder Include="wwwroot" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.3" />
    <DotNetCliToolReference Include="Microsoft.DotNet.Watcher.Tools" Version="2.0.0" />
  </ItemGroup>

</Project>

然后在终端上使用命令 dotnet restore 手动更新包

输入dotnet watch run 运行

再去修改

 public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.Run(async (context) =>
            {
                await context.Response.WriteAsync("Hello World!22222");
            });
        }

　　保存 ，刷新页面