/// <summary>
/// /// 异步查询数据集合
/// </summary>
/// <typeparam name="T">实体</typeparam>
/// <param name="connection">连接字符串</param>
/// <param name="cmd">sql语句</param>
/// <param name="param">参数</param>
/// <param name="flag">true存储过程，false sql语句</param>
/// <returns>t</returns>
public Task <IList <T> > GetListAsync <T>(string connection, string cmd, DynamicParameters param, bool flag = false) where T : class, new()
{
return(_sqlhelper.GetListAsync <T>(connection, cmd, param, flag));
}