缺少参考。确保项目引用“Microsoft.NET.Sdk.web”

Question

尝试运行 asp.net 核心项目时出现此错误。缺少一个或多个编译参考。确保项目引用“Microsoft.NET.Sdk.web”且 PreserveCompilationContext 属性未设置为 falseEfDemo.csproj<Project Sdk="Microsoft.NET.Sdk.Web">  <PropertyGroup>    <TargetFramework>netcoreapp2.0</TargetFramework>  </PropertyGroup>  <ItemGroup>    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.6" />    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="2.1.1" />    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="2.1.1" />    <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="2.1.1" />  </ItemGroup>  <ItemGroup>    <DotNetCliToolReference Include="Microsoft.EntityFrameworkCore.Tools.DotNet" Version="2.0.0" />    <DotNetCliToolReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Tools" Version="2.0.0" />  </ItemGroup></Project>家庭控制器.csnamespace EfDemo.Controllers{    public class HomeController : Controller    {        async public Task<IActionResult> Index()        {            using (var context = new EFCoreWebDemoContext())            {                var model = await context.Authors.AsNoTracking().ToListAsync();                return View(model);            }        }    }}

Answer 1

我有同样的问题。当我卸载 nuget 中的软件包并再次安装时，我能够解决以下问题。之后，我编译了该项目，它再次运行。