我的问题是下面的代码在启动期间没有注册数据存储.这是我在应用程序的响应中得到的特定"错误"语句:
An unhandled exception occurred while processing the request.
InvalidOperationException: No data stores are configured. Configure a data store by overriding OnConfiguring in your DbContext class or in the AddDbContext method when setting up services.
Microsoft.Data.Entity.Storage.DataStoreSelector.SelectDataStore(ServiceProviderSource providerSource)
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在ConfigureServices(IServiceCollection服务)中,我试图在lambda中为我的DbContext指定DbContextOptions.码:
services.AddEntityFramework(Configuration)
.AddSqlServer()
.AddDbContext<MyDbContext>(
options =>
options.UseSqlServer(Configuration.Get("Data:DefaultConnection:ConnectionString"))
);
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在我的DbContext中,我有一个构造函数,它将选项发送到base,代码:
public MyContext(DbContextOptions options) : base(options) { }
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我的配置文件config.json在启动时读取,包含以下连接字符串:
"Data": {
"DefaultConnection": {
"ConnectionString": "Server=(localdb)\\MSSQLLocalDB;Database=MyDbName;Trusted_Connection=True;MultipleActiveResultSets=True;"
}
}
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我以前用过
protected override void OnConfiguring(DbContextOptions options)
{
options.UseSqlServer(Startup.Configuration.Get("Data:DefaultConnection:ConnectionString"));
}
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在我的DbContext中成功.它注册数据存储并且它正常工作,但我宁愿使用lambda方式.
如果需要更多信息,我会提供.
c# entity-framework dependency-injection entity-framework-core asp.net-core-mvc
c# ×1