/// <summary>
/// 初始化 <see cref="DefaultContextService"/> 类的新实例。
/// </summary>
/// <param name="context"></param>
/// <param name="databaseFactory">一个用于创建 <see cref="IDatabase"/> 的工厂函数。</param>
public DefaultContextService(EntityContextInitializeContext context, Func <IProvider, ConnectionString, IDatabase> databaseFactory)
: base(context)
{
var options = context.Options;
Func <IDatabase> factory = null;
if (DatabaseScope.Current != null)
{
factory = () => DatabaseScope.Current.Database;
}
else if (databaseFactory != null)
{
factory = () => databaseFactory(context.Provider, context.ConnectionString);
}
else if (context.Provider != null && context.ConnectionString != null)
{
factory = () => new Database(context.ConnectionString, context.Provider);
}
else if (options != null)
{
factory = () => DatabaseFactory.CreateDatabase(options.ConfigName);
}
if (factory != null)
{
Database = EntityDatabaseFactory.CreateDatabase(InstanceName, factory);
Provider = Database.Provider;
}
}
/// <summary>
/// 初始化 <see cref="EntityTransactionScope"/> 类的新实例。
/// </summary>
/// <param name="option">选项。</param>
public EntityTransactionScope(EntityTransactionScopeOption option = null)
{
var database = DatabaseFactory.GetDatabaseFromScope();
if (database != null)
{
SetDatabase(DatabaseScope.Current.InstanceName, database);
EntityDatabaseFactory.StartTransaction(database, option);
}
Option = option;
}