private static DbInstance CreateDbInstance(DbInstanceType type, Database database, DbTransaction transaction)
{
if (type == DbInstanceType.Default)
{
return(new DbInstance(database, transaction));
}
return(new AutoParameterDbInstance(database, transaction));
}
private static DbInstance GetDbInstance(DbInstanceType type, string databaseName)
{
if (string.IsNullOrEmpty(databaseName))
{
throw new ArgumentNullException("databaseName", "数据库名称不能为空。");
}
string key = GenerateKey(databaseName);
if (ServiceContext.Current.Contains(key))
{
DataAccessContext context = (DataAccessContext)ServiceContext.Current[key];
return(CreateDbInstance(type, context.Database, context.Transaction));
}
return(CreateDbInstance(type, GetDatabase(databaseName), null));
}
