dotnet核心没有重载方法,UseInMemoryDatabase()接受0参数

Question

我在https://docs.microsoft.com/en-us/aspnet/core/tutorials/web-api-vsc上尝试dotnet核心教程

TodoContext.cs

using Microsoft.EntityFrameworkCore;
namespace TodoApi.Models
{
    public class TodoContext : DbContext
    {
        public TodoContext(DbContextOptions<TodoContext> options)
            : base(options)
        {
        }
        public DbSet<TodoItem> TodoItems { get; set; }
    }
}

Startup.cs

using ...
using TodoApi.Models;
using Microsoft.EntityFrameworkCore;

namespace TodoApi
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        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)
        {
            services.AddDbContext<TodoContext>(opt => opt.UseInMemoryDatabase());
            services.AddMvc();
            services.AddScoped<ITodoRepository, TodoRepository>();
        }

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

所以我得到了这个"没有重载方法,用于UseInMemoryDatabase()接受0参数"我用google搜索UseInMemoryDatabase()方法签名但找不到任何.

我应该为UseInMemoryDatabase()提供什么参数？

更新:

一旦我将Microsoft.EntityFrameworkCore.InMemory从2.0.0-preview1-final降级到1.1.1并且运行dotnet restore错误消失了.

  <ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.0-preview1-final"/>
    <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="1.1.1"/>
  </ItemGroup>

我怀疑错误是由于Microsoft.EntityFrameworkCore.InMemory没有"2.0.0-preview1-final"？如果这是真的那么错误不是因为参数的数量,而是因为没有安装InMemory db,因此在项目的任何地方都没有定义UseInMemoryDatabase().

Answer 1

您需要提供数据库名称.

services.AddDbContext<ApiContext>(options => options.UseInMemoryDatabase("RazorPagesApp"));