如何從數據庫刪除項目時動態更新列表

Question

我有一個列表顯示我創建的SQlite數據庫的內容。但是，當我運行該功能從數據庫中刪除用戶選擇的項目之一時，項目仍會顯示，直到我刷新視圖（現在單擊「主頁」並重新進入視圖）。我怎樣才能讓列表在用戶刪除項目時自動更新？

這是我的刪除功能和列表代碼：

protected function getAllcards():void // retrieve the cards from the DB and display 
     { 
      var stmt:SQLStatement = new SQLStatement(); 
      var conn:SQLConnection = new SQLConnection(); 
      stmt.sqlConnection = conn; 
      conn.open(File.applicationStorageDirectory.resolvePath("FlashCards.db")); 
      stmt.text = "SELECT cTitle FROM cardItems"; 
      stmt.execute(); 
      myCardsList.dataProvider = new ArrayCollection(stmt.getResult().data); 

     } 

     protected function myCardsList_creationCompleteHandler(event:FlexEvent):void //executed when the List completes loading 
     { 
      getAllcards(); 
     } 



protected function deleteButton_clickHandler(event:MouseEvent):void // pushed delete button 
     { 
      if(myCardsList.selectedItem != null) 
      { 
      var stmt:SQLStatement = new SQLStatement(); 
      var conn:SQLConnection = new SQLConnection(); 
      stmt.sqlConnection = conn; 
      conn.open(File.applicationStorageDirectory.resolvePath("FlashCards.db")); 
      stmt.text= "DELETE FROM cardItems WHERE cTitle = ?"; 
      stmt.parameters[0] = myCardsList.selectedItem.cTitle; 
      stmt.execute(); 
      refresher(); 
      } 

     } 

私有函數複習（）：無效 {VAR 語句：=的SQLStatement新的SQLStatement（）; var conn：SQLConnection = new SQLConnection（）; stmt.sqlConnection = conn; conn.open（File.applicationStorageDirectory.resolvePath（「FlashCards.db」））; stmt.text =「SELECT * FROM cardItems」; //刷新列表在這裏？ stmt.execute（）; myCardsList.dataProvider = new ArrayCollection（stmt.getResult（）。data）; }

列表：

<s:List id="myCardsList" x="10" y="10" left="0" right="0" top="0" bottom="0" width="1004" 
     height="500" 
     creationComplete="myCardsList_creationCompleteHandler(event)" enabled="true"> 
    <s:itemRenderer> 
     <fx:Component> 
      <s:MobileItemRenderer label = "{data.cTitle}"/> // The Application is a mobile app 
     </fx:Component> 
    </s:itemRenderer> 
</s:List> 

感謝您的幫助！ =）

Answer 1

您可以顯示您正在爲myCardsList分配數據提供者的位置嗎？作爲一個盲目的猜測，也許這會工作：

myCardsList.dataProvider.refresh(); //Normally used to apply a sort or filter function 

肖恩