Data form wizard 數(shù)據(jù)窗體向?qū)?i class="labawb" onClick="playMp3('sound_c_1')">
You can then use your formatted and typed dataset in your application development , including the ability to generate data forms using the data form wizard 然后,您可以在應(yīng)用程序開(kāi)發(fā)中使用格式化和類型化的數(shù)據(jù)集,包括可以使用數(shù)據(jù)窗體向?qū)蓴?shù)據(jù)窗體。
If the primary key or the " not null " column of the database is not selected in the data form wizard when you create the data form , the add - creates a new record option is not disabled 如果創(chuàng)建數(shù)據(jù)窗體時(shí)在“數(shù)據(jù)窗體向?qū)А敝形催x擇數(shù)據(jù)庫(kù)的主鍵或“非null ”列,則不會(huì)禁用“添加-創(chuàng)建一條新記錄”選項(xiàng)。
To work around this problem , select the following columns of the selected table when you add a data form by using the data form wizard : the primary column and a column that does not permit nulls 若要解決此問(wèn)題,請(qǐng)?jiān)谔砑訑?shù)據(jù)窗體時(shí)通過(guò)使用“數(shù)據(jù)窗體向?qū)А边x擇所選表中的以下列:主列和不允許null的列。
If you use the navigation buttons to move through the records of a database table on a data form , this exception may be thrown with the additional information , " column column does not allow nulls . " this behavior occurs because the primary key or the " not null " column of the database table was not selected in the data form wizard 如果使用導(dǎo)航按鈕在數(shù)據(jù)窗體上的數(shù)據(jù)庫(kù)表的記錄之間移動(dòng),則可能會(huì)引發(fā)此異常,并顯示附加信息: “列column不允許空值。 ”此行為的發(fā)生是由于在“數(shù)據(jù)窗體向?qū)А敝形催x擇數(shù)據(jù)庫(kù)表的主鍵或“非null ”列。