0

我对 Flex 中的 AdvancedDataGrid 有疑问。我有一个带有可绑定 ArrayCollection 作为 DataProvider 的 AdvancedDataGrid。当我设置 ArrayCollection（通过单击按钮 1）时，AdvancedDataGrid 将代表 4 列。

之后我单击按钮 2。在这种情况下，AdvancedDataGrid 仍然显示 4 列而不是预期的 3 列。

方案 2

首先单击 Button2 -> AdvancedDataGrid 显示 3 列单击 Button1 -> AdvancedDataGrid 仍显示 3 列而不是预期的 4 列

如何告诉 AdvancedDataGrid 调整列数？

片段：

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" minWidth="955" minHeight="600" creationComplete="application1_creationCompleteHandler(event)">
    <mx:Script>
        <![CDATA[
            import mx.collections.ArrayCollection;
            import mx.events.FlexEvent;
            [Bindable]
            private var dataProv:ArrayCollection;


            protected function button1_clickHandler(event:MouseEvent):void {
                dataProv = new ArrayCollection([
                    {country:"USA", year2004:3.5, year2005:4.2, year2006:3.7},
                    {country:"UK", year2004:1.7, year2005:3.1, year2006:3.6},
                    {country:"Canada", year2004:2.8, year2005:2.9, year2006:3.4},
                    {country:"Japan", year2004:2.6, year2005:2.3, year2006:2.8},
                    {country:"France", year2004:1.4, year2005:2.1, year2006:2.6},
                    {country:"Brazil", year2004:2.6, year2005:4.9, year2006:4.4},
                    {country:"Russia", year2004:6.4, year2005:7.2, year2006:6.7},
                    {country:"India", year2004:8.0, year2005:7.1, year2006:6.6},
                    {country:"China", year2004:9.9, year2005:10.1, year2006:10.6}
                ]); 
                adg.validateNow();
                adg.dataProvider.refresh();
            }


            protected function button2_clickHandler(event:MouseEvent):void{
                dataProv = new ArrayCollection([
                    {country:"USA", year2004:3.5, year2005:4.2},
                    {country:"UK", year2004:1.7, year2005:3.1},
                    {country:"Canada", year2004:2.8, year2005:2.9},
                    {country:"Japan", year2004:2.6, year2005:2.3},
                    {country:"France", year2004:1.4, year2005:2.1},
                    {country:"Brazil", year2004:2.6, year2005:4.9},
                    {country:"Russia", year2004:6.4, year2005:7.2},
                    {country:"India", year2004:8.0, year2005:7.1},
                    {country:"China", year2004:9.9, year2005:10.1}
                ]); 
                adg.validateNow();
                adg.dataProvider.refresh();
            }

        ]]>
    </mx:Script>

    <mx:HBox width="100%" height="100%">
        <mx:AdvancedDataGrid
            id="adg"
            width="100%"
            height="100%"
            dataProvider="{dataProv}"/>
        <mx:Button label="change" click="button1_clickHandler(event)"/>
        <mx:Button label="changeBack" click="button2_clickHandler(event)"/>
    </mx:HBox>

</mx:Application>
4

1 回答 1

1

您需要扩展 AdvancedDataGrid 类并覆盖 collectionChangeHandler。您需要将受保护的 var generatedColumns 设置为 true，以便动态列代码执行多次。

override protected function collectionChangeHandler(event:Event):void
{
    generatedColumns = true;
    super.collectionChangeHandler(event);
}
于 2012-07-10T15:35:42.460 回答