Flex GroupingCollection：循环子级

发布于 2024-08-10 23:18:52 字数 178 浏览 5 评论 0原文

我正在使用 GroupingCollection 来绑定我的高级数据网格。我使用 groupingcollection 按日期对数据进行分组。

现在我需要通过代码选择数据网格中的数据。有谁知道如何做到这一点？我需要循环访问 adg 的数据提供程序并选择与选择标准相匹配的项目。

请指教

谢谢:)

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哑 2024-08-17 23:18:52

好的，根据问题的解释方式，此代码将找到与所选分组年份匹配的项目。我向 mx:AdvancedDataGrid 添加了一个 click=findStuff(event)，如下所示：

[Bindable]  
public var myData:ArrayCollection = new ArrayCollection([
    {name:'Denise', grad:'2000'},
    {name:'Steph', grad:'1990'},
    {name:'Jane', grad:'2000'},
    {name:'Nicole', grad:'2000'},
    {name:'Donna', grad:'1990'}]);

public function findStuff(e:Event):void {
    var groupColl:GroupingCollection = adGrid.dataProvider.source;
    var items:Object = groupColl.source;

    var ac:ArrayCollection = new ArrayCollection();
    for (var i:int=0; i<items.length; i++) {
        if (items[i].grad == e.target.text) {
            ac.addItem(items[i].name);
        }
    }
    Alert.show("selected items: " + ac.toArray());
}

<mx:GroupingCollection id="coll" source="{myData}">
    <mx:Grouping>
        <mx:GroupingField name="grad" />
    </mx:Grouping>
</mx:GroupingCollection>

<mx:AdvancedDataGrid id="adGrid" dataProvider="{coll}"
                         click="findStuff(event)"
                         initialize="coll.refresh()">
    <mx:columns>
        <mx:AdvancedDataGridColumn headerText="name" dataField="name"/>
    </mx:columns>
</mx:AdvancedDataGrid>

请注意，首先我从 AdvancedDataGrid dataProvider 获取 GroupingCollection，然后获取项目来自分组集合。这些可以合并为一个步骤，但这种方式对于示例来说更具可读性。由于不确切知道您要查找的数据，我只是从数据 item 中获取 name 字段，但您没有理由无法获取整个 item< /代码>。

希望这对您来说是朝着正确方向迈出的一步。

Okay, depending on how the question in interpreted, this code will find the items that match the grouping year that is selected. I added a click=findStuff(event) to the mx:AdvancedDataGrid, as shown here:

[Bindable]  
public var myData:ArrayCollection = new ArrayCollection([
    {name:'Denise', grad:'2000'},
    {name:'Steph', grad:'1990'},
    {name:'Jane', grad:'2000'},
    {name:'Nicole', grad:'2000'},
    {name:'Donna', grad:'1990'}]);

public function findStuff(e:Event):void {
    var groupColl:GroupingCollection = adGrid.dataProvider.source;
    var items:Object = groupColl.source;

    var ac:ArrayCollection = new ArrayCollection();
    for (var i:int=0; i<items.length; i++) {
        if (items[i].grad == e.target.text) {
            ac.addItem(items[i].name);
        }
    }
    Alert.show("selected items: " + ac.toArray());
}

<mx:GroupingCollection id="coll" source="{myData}">
    <mx:Grouping>
        <mx:GroupingField name="grad" />
    </mx:Grouping>
</mx:GroupingCollection>

<mx:AdvancedDataGrid id="adGrid" dataProvider="{coll}"
                         click="findStuff(event)"
                         initialize="coll.refresh()">
    <mx:columns>
        <mx:AdvancedDataGridColumn headerText="name" dataField="name"/>
    </mx:columns>
</mx:AdvancedDataGrid>

Note that first I get the GroupingCollection from the AdvancedDataGrid dataProvider, then I get the items from the GroupingCollection. These could be combined into one step, but this way is more readable for the example. Not knowing exactly what data you're looking for I just grab the name field from the data item but there's no reason you couldn't grab the whole item.

Hopefully this is a step in the right direction for you.

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