如何从数据库删除项目时动态更新列表

Question

我有一个列表显示我创建的SQlite数据库的内容。但是，当我运行该功能从数据库中删除用户选择的项目之一时，项目仍会显示，直到我刷新视图（现在单击“主页”并重新进入视图）。我怎样才能让列表在用户删除项目时自动更新？

这是我的删除功能和列表代码：

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(); 
      } 

     } 

私有函数复习（）：无效 {VAR 语句：=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”; //刷新列表在这里？ 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> 

感谢您的帮助！ =）

Answer 1

您可以显示您正在为myCardsList分配数据提供者的位置吗？作为一个盲目的猜测，也许这会工作：

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

肖恩