c# – 内部循环中的ExecuteNonQuery

它在我硬编码这样的值时起作用：

string query3 = "INSERT INTO furniture (room_id,member_id) VALUES (222,333);";
    SqlCommand cmd3 = new SqlCommand(query3,sqlConnection3);
    sqlConnection3.Open();

    for (int i = 0; i < arrItemsPlanner.Length; i++)
    {
        try
            {
                cmd3.ExecuteNonQuery();
            }
            catch
            {
                return "Error: Item could not be saved";
            }
            finally
            {
                //Fail
            }
        }

但是,当我使用参数化查询时,它不起作用 – 即使我将值硬编码到参数化查询中,如下所示：

string query3 = "INSERT INTO furniture (room_id,member_id) VALUES (@room_id,sqlConnection3);
    sqlConnection3.Open();

    for (int i = 0; i < arrItemsPlanner.Length; i++)
    {
        try
            {
                cmd3.Parameters.Add("@room_id",System.Data.SqlDbType.Int);
                cmd3.Parameters["@room_id"].Value = 222;
                cmd3.ExecuteNonQuery();
            }
            catch
            {
                return "Error: Item could not be saved";
            }
            finally
            {
                //Fail
            }
        }

有人能看到我在哪里错了吗？

非常感谢！