Update-Database不会创建db

Question

我尝试使用Update-Database创建数据库;但是，虽然一切似乎都很好，但是当我点击SQL Server对象资源管理器时，我看不到任何新的数据库。

PM> Update-Database -Verbose
Using StartUp project 'Stats'.
Using NuGet project 'Stats'.
Specify the '-Verbose' flag to view the SQL statements being applied to the target database.
Target database is: 'Stats.DataAccess.StatsDbContext' (DataSource: .\SQLEXPRESS, Provider: System.Data.SqlClient, Origin: Convention).
Applying explicit migrations: [201511280800579_Initial].
Applying explicit migration: 201511280800579_Initial.
INSERT [dbo].[__MigrationHistory]([MigrationId], [ContextKey], [Model], [ProductVersion])
VALUES (N'201511280800579_Initial', N'Stats.Migrations.Configuration',  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

Running Seed method.
PM> Update-Database -Verbose
Using StartUp project 'Stats'.
Using NuGet project 'Stats'.
Specify the '-Verbose' flag to view the SQL statements being applied to the target database.
Target database is: 'Stats.DataAccess.StatsDbContext' (DataSource: .\SQLEXPRESS, Provider: System.Data.SqlClient, Origin: Convention).
No pending explicit migrations.
Running Seed method.
PM> 

我不明白为什么我没有收到错误消息，如果它没有创建数据库。另外，我应该在配置文件中有一个connectionStrings元素吗？它不在那里。我以为它是默认自动创建的。

试图重做每一步都无济于事：

PM> Enable-Migrations
Checking if the context targets an existing database...
Code First Migrations enabled for project Stats.
PM> Add-Migration Initial
Scaffolding migration 'Initial'.
The Designer Code for this migration file includes a snapshot of your current Code First model. This snapshot is used to calculate the changes to your model when you scaffold the next migration. If you make additional changes to your model that you want to include in this migration, then you can re-scaffold it by running 'Add-Migration Initial' again.

A previous migration called 'Initial' was already applied to the target database. If you meant to re-scaffold 'Initial', revert it by running 'Update-Database -TargetMigration 201511280718053_Initial', then delete '201511280832547_Initial.cs' and run 'Add-Migration Initial' again.
PM> Update-Database
Specify the '-Verbose' flag to view the SQL statements being applied to the target database.
Applying explicit migrations: [201511280832547_Initial].
Applying explicit migration: 201511280832547_Initial.
Running Seed method.
PM> 

Answer 1

这通常是评论，但我正在展示一张照片。

如果单击App_Data文件夹图标，您将看到此图标。 单击此图标将显示/隐藏项目中的某些文件。

如果文件夹中有任何文件，它们将显示为灰色。

由于update-database命令运行了种子方法，因此表示数据库存在。

此外，您可以查看sql server的数据文件夹或物理应用程序的App_Data文件夹。