private static async Task <IEnumerable <TReturn> > MultiMapAsync <TFirst, TSecond, TThird, TFourth, TFifth, TSixth, TSeventh, TReturn>(this IDbConnection cnn, CommandDefinition command, Delegate map, string splitOn)
{
object param = command.Parameters;
var identity = new Identity(command.CommandText, command.CommandType, cnn, typeof(TFirst), param == null ? null : param.GetType(), new[] { typeof(TFirst), typeof(TSecond), typeof(TThird), typeof(TFourth), typeof(TFifth), typeof(TSixth), typeof(TSeventh) });
var info = GetCacheInfo(identity, param, command.AddToCache);
bool wasClosed = cnn.State == ConnectionState.Closed;
try
{
if (wasClosed)
{
await((DbConnection)cnn).OpenAsync(command.CancellationToken).ConfigureAwait(false);
}
using (var cmd = (DbCommand)command.SetupCommand(cnn, info.ParamReader))
using (var reader = await cmd.ExecuteReaderAsync(wasClosed ? CommandBehavior.CloseConnection | CommandBehavior.SequentialAccess : CommandBehavior.SequentialAccess, command.CancellationToken).ConfigureAwait(false))
{
if (!command.Buffered)
{
wasClosed = false; // handing back open reader; rely on command-behavior
}
var results = MultiMapImpl <TFirst, TSecond, TThird, TFourth, TFifth, TSixth, TSeventh, TReturn>(null, CommandDefinition.ForCallback(command.Parameters), map, splitOn, reader, identity, true);
return(command.Buffered ? results.ToList() : results);
}
}
finally
{
if (wasClosed)
{
cnn.Close();
}
}
}
