Flex datagrid和嵌套的Array dataprovider

时间:2011-08-05 16:27:51

标签: flex actionscript-3 datagrid flex3

我在许多项目中使用了datagrid,使用以下“常用数据结构”填充网格,并带来标准o / p,如下图所示。 但是现在对于一个赋值,我想使用下面提到的“复杂数据结构”(嵌套数组)来获得相同的网格结果。我有一些想法是在将数据推送到网格之前处理数据,但问题是我需要执行一些更新,通过网格渲染器编辑删除操作,同样也应该反映到源集合中。请让我知道有没有办法可以使用“复杂结构”并使用任何flex in build属性带来预期的o / p。提前致谢。

通常的数据结构

steps = [a,b,c];
a = {x:100,y:y1,z:z1};
b = {x:200,y:y2,z:z2};
c = {x:300,y:y3,z:z3};

复杂的数据结构

[] is an Array collection not Array type.    
a = [100,y1,z1];
b = [200,y2,z2];
c = [300,y3,z3];
steps = [[a,some objects],[b,some objects],[c,some objects]];

enter image description here

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="init()">
<mx:Script>
    <![CDATA[

        import mx.collections.ArrayCollection;

        private var a:ArrayCollection = new ArrayCollection(['x1','y1','z1']);
        private var b:ArrayCollection = new ArrayCollection(['x2','y2','z2']);
        private var c:ArrayCollection = new ArrayCollection(['x3','y3','z3']);
        [Bindable]
        private var stepsObjs:ArrayCollection = new ArrayCollection([{ items: a},{ items: b},{ items: c}]);

    ]]>
</mx:Script>

<mx:DataGrid dataProvider="{stepsObjs}" >
    <mx:columns>
        <mx:DataGridColumn dataField="items.0" headerText="x" />
        <mx:DataGridColumn dataField="items.1" headerText="y" />
        <mx:DataGridColumn dataField="items.2" headerText="z" />
    </mx:columns>
</mx:DataGrid>  
</mx:Application>

2 个答案:

答案 0 :(得分:3)

编辑更换代码以解决新问题。


这个对我有用:

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
               xmlns:s="library://ns.adobe.com/flex/spark" 
               xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600"
               >
    <fx:Script>
        <![CDATA[
            import mx.collections.ArrayCollection;

            private var a:ArrayCollection = new ArrayCollection([100,'y1','z1']);
            private var b:ArrayCollection = new ArrayCollection([200,'y2','z2']);
            private var c:ArrayCollection = new ArrayCollection([300,'y3','z3']);

            private var stepsObjs:ArrayCollection = new ArrayCollection([{ items: a},{ items: b},{ items: c}]);
            private var stepsColl:ArrayCollection = new ArrayCollection([[a],[b],[c]]);

        ]]>
    </fx:Script>
    <s:layout>
        <s:VerticalLayout />
    </s:layout>
    <mx:DataGrid dataProvider="{stepsObjs}" >
        <mx:columns>
            <mx:DataGridColumn dataField="items.0" headerText="x" />
            <mx:DataGridColumn dataField="items.1" headerText="y" />
            <mx:DataGridColumn dataField="items.2" headerText="z" />
        </mx:columns>
    </mx:DataGrid>

    <mx:DataGrid dataProvider="{stepsColl}" >
        <mx:columns>
            <mx:DataGridColumn dataField="0.0" headerText="x" />
            <mx:DataGridColumn dataField="0.1" headerText="y" />
            <mx:DataGridColumn dataField="0.2" headerText="z" />
        </mx:columns>
    </mx:DataGrid>

</s:Application>

答案 1 :(得分:1)

itemRenderers应该发送一个描述应该发生什么的事件,然后应该将其处理得更高。

像这样:

//inside item renderer
dispatchEvent(new ItemEvent(ItemEvent.DELETE_ITEM, true, item));//where true tells the event to bubble (you'll need to create this event)

//somewhere above the DataGrid
dataGrid.addEventListener(ItemEvent.DELETE_ITEM, deleteItemFromSource);

protected function deleteItemFromSource(e:ItemEvent):void {
    var lcv:ListCollectionView = (dataGrid.dataProvider as ListCollectionView);
    lcv.removeItemAt(lcv.getItemIndex(e.item));
}

请注意,如果您希望数据网格在更改时自动更新,那么您应该使用某种ListCollectionView,数组。

HTH;

艾米