C# 首先使用ASP.NET代码创建SQL Server Express数据库

我有一个包含少量数据模型的现有项目，我正在尝试使用Visual Studio 2015创建一个SQL Server Express数据库，并在SQL Server Management Studio中打开该数据库

我在Visual Studio中启用了迁移，它生成了一个migration Configuration.cs文件，如下所示：

internal sealed class Configuration : DbMigrationsConfiguration<MyDbContext>
{
    public Configuration()
    {
        AutomaticMigrationsEnabled = true;
        ContextKey = "Fully.Qualified.Namespace.MyDbContext";
    }
}

<add name="MyDatabaseName" connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\MyDatabaseName.mdf;Initial Catalog=MyDatabaseName;Integrated Security=True;User Instance=True" providerName="System.Data.SqlClient" />

我确信有办法解决版本控制错误，但为什么Visual Studio不为我创建.mdf文件？

您尝试过这个吗

Unable to open the physical file "<path>\App_Data\MyDatabaseName.mdf". Operating system error 2: "2(The system cannot find the file specified.)".

The database 'MyDatabaseName' cannot be opened because it is version 852. This server supports version 706 and earlier. A downgrade path is not supported.