PetaPoco ORM 增加返回DataTable的方法

public DataTable ExecuteDataTable(Sql sql)
{
    return ExecuteDataTable(sql.SQL, sql.Arguments);
}
public DataTable ExecuteDataTable(string sql, params object[] args)
{
    try
    {
        OpenSharedConnection();
        try
        {
            using (var cmd = CreateCommand(_sharedConnection, sql, args))
            {
                var val = cmd.ExecuteReader();
                OnExecutedCommand(cmd);
                var dt = new DataTable();
                dt.Load(val);
                return dt; //(T)Convert.ChangeType(val, typeof(T));
            }
        }
        finally
        {
            CloseSharedConnection();
        }
    }
    catch (Exception x)
    {
        OnException(x);
        throw;
    }
}