Question

我有一个List，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一个用户选择的项目时，这些项目仍然会显示，直到我刷新视图（现在通过单击“主页”并重新进入视图）。如何在用户删除项目时让列表自动更新？

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();
            }

        }

private function refresher（）：void { var stmt：SQLStatement = new SQLStatement（）; var conn：SQLConnection = new SQLConnection（）; stmt.sqlConnection = conn; conn.open（File.applicationStorageDirectory.resolvePath（ “FlashCards.db”））; stmt.text =“SELECT * FROM cardItems”; // REFRESH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

你能否展示你为myCardsList分配数据提供者的位置？作为一个盲目的猜测，这可能会起作用：

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

肖恩

如何从数据库中删除项目时动态更新List

1 个答案: