在尝试运行ASP.NET Core项目时，我遇到了这个错误。
缺少一个或多个编译引用。请确保项目引用了“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>
HomeController.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);
}
}
}
}
EFCoreWebDemoContext.cs
public class EFCoreWebDemoContext : DbContext
{
public DbSet<Book> Books { get; set; }
public DbSet<Author> Authors { get; set; }
protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
optionsBuilder.UseSqlServer(@"connection string");
}
}
Index.cshtml
@{
ViewData["Title"] = "Home Page";
}
<div>
<span>Home Page</span>
</div>
_Layout.cshtml
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>@ViewData["Title"] - EfDemo</title>
</head>
<body>
@RenderBody()
@RenderSection("Scripts", required: false)
</body>
</html>
_ViewImports.cshtml
@using EfDemo
@using EfDemo.Models
@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers
@addTagHelper *, Microsoft.NET.Sdk
在HomeController.cs文件中添加了断点并检查，执行应用程序时在return View(model)处崩溃。
尝试修改下面所示的HomeController.cs，但仍然存在相同的问题。
public IActionResult Index()
{
return View();
}