相关疑难解决方法(0)

我正在使用Entity Framework 5和Code First Migrations.我有一个DataStore类派生自DbContext:

public class DataStore : DbContext, IDataStore
{
    public int UserID { get; private set; }

    public DataStore(int userId, string connectionString) : base(connectionString)
    {
        UserID = userId;
    }

    public virtual IDbSet<User> Users { get; set; }

    // Rest of code here
}

还有一个创建类实例的工厂DataStore类:

public class DataStoreFactory : Disposable, IDataStoreFactory
{
    private DataStore _database;
    private int _userId;
    private string _connectionString;

    public DataStoreFactory(int userId, string connectionString)
    {
        _userId = userId;
        _connectionString = …

Platform .NET 4.5和Entity Framework 6.

问题 我有以下代码来执行迁移:

//The following function just returns an object of the Configuration() class 
//generated by code migrations
var migratorConfig = currentMigrationProvider.CreateDbMigrationConfiguration(); 
var dbMigrator = new System.Data.Entity.Migrations.DbMigrator(migratorConfig);
dbMigrator.Update();

问题是Update()函数尝试创建我的DbContext类的实例,出于一些好的原因,我需要手动创建上下文并将其提供给dbMigrator.那可能吗？怎么样？