在Startup.cs中添加DbContextOptions而不註冊數據存儲

我的問題是下面的代碼在啟動期間沒有註冊數據存儲。這是我從應用程序的響應中得到的特定“錯誤”語句：

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)

在ConfigureServices（IServiceCollection服務）中，我試圖在lambda中為我的DbContext指定DbContextOptions。碼：

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)

在我的DbContext中，我有一個構造函數，它將選項發送到base，代碼：

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)

我的配置文件config.json在啟動時讀取，包含以下連接字符串：

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)

我以前用過

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)

在我的DbContext中成功。它註冊數據存儲並且它正常工作，但我寧願使用lambda方式。

如果需要更多信息，我會提供。