禁止Form上某个字段以外其他字段全部不可编辑

public int active()
{
    int ret;
    dictTable m_dictTable = new DictTable(tableNum(Dbwork));
    dictField m_dictField;
    int       i;
    ;

    for (i =1 ;i <=m_dictTable.fieldCnt();i++)
    {
        m_dictfield = new dictField(tableNum(Dbwork),m_dictTable.fieldCnt2Id(i));
        if(!m_dictField.isSystem())
        {
            if(!(m_dictField.id() == fieldNum(Dbwork,choose)))
                Dbwork_ds.object(m_dictfield.id()).allowEdit(false);

        }
    }
    ret = super();

    return ret;
}