获取SqlDataReader中正在读取的列的ID

using (SqlConnection connection = new SqlConnection(connectionString))
{
    SqlCommand command = new SqlCommand(queryString, connection);
    connection.Open();
    SqlDataReader reader = command.ExecuteReader();
    
    while (reader.Read())
    {
        int columnId = reader.GetOrdinal("ColumnName");
        // 使用columnId获取正在读取的列的ID
        // 其他操作...
    }
    
    reader.Close();
}