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 false

EfDemo.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.cs

namespace 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。