Flex DataGrid数据的多种显示方式

Flex DataGrid单元格显示数据有多种方式。

1.默认的是截取模式，就是对于显示不下的内容进行自动截取，会被下一列所遮盖。看下图：

2. 但是有时候我们需要能够方便的显示所有内容，但又不希望这一列变得很宽。有一个方法就是自动隐藏该单元的内容，对于数据量大的自动在后面加...，当鼠标移动到该单元格上时，能够以ToolTip的形式完全显示该单元的内容，这个我们可以采用将Label作为该列的itemRenderer办法，具体效果如下：


3. 有时候我们需要DataGrid的每行内容能够显示全所有的内容，如果该列的内容比较多，那么我们希望能够自动换行显示在该列中。其实很简单，我们可以利用DataGridColumn的wordWrap属性，设为true之后的效果如下


效果2的代码如下：实际上只要设定itemRenderer="mx.controls.Label"就可以了

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" backgroundColor="white" layout="vertical">  
    <mx:Array id="arr">
        <mx:Object articleName="Finding out a characters Unicode character code" data="15" />
        <mx:Object articleName="Setting an icon in an Alert control" data="14" />
        <mx:Object articleName="Setting an icon in a Button control" data="13" />
        <mx:Object articleName="Installing the latest nightly Flex 3 SDK build into Flex Builder 3" data="10" />
        <mx:Object articleName="Detecting which button a user pressed to dismiss an Alert dialog" data="9" />
        <mx:Object articleName="Using the Alert control" data="8" />
        <mx:Object articleName="Formatting data tips in a Slider" data="7" />
        <mx:Object articleName="Downloading the latest Adobe Labs version of Flex 3 SDK/Flex Builder 3 (codename: Moxie)" data="6" />
    </mx:Array>
    <mx:ArrayCollection id="arrColl" source="{arr}" />
    <mx:DataGrid id="dataGrid" dataProvider="{arrColl}" variableRowHeight="true" width="100%" height="100%">
        <mx:columns>
            <mx:DataGridColumn id="articleName" dataField="articleName" headerText="Name of the article in question" itemRenderer="mx.controls.Label" />
            <mx:DataGridColumn id="data" dataField="data" headerText="ID of the article" />
        </mx:columns>
    </mx:DataGrid>
</mx:Application>

效果3的代码如下：实际上只要设定wordWrap="true"就可以了
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" backgroundColor="white" layout="vertical">  
    <mx:Array id="arr">
        <mx:Object articleName="Finding out a characters Unicode character code" data="15" />
        <mx:Object articleName="Setting an icon in an Alert control" data="14" />
        <mx:Object articleName="Setting an icon in a Button control" data="13" />
        <mx:Object articleName="Installing the latest nightly Flex 3 SDK build into Flex Builder 3" data="10" />
        <mx:Object articleName="Detecting which button a user pressed to dismiss an Alert dialog" data="9" />
        <mx:Object articleName="Using the Alert control" data="8" />
        <mx:Object articleName="Formatting data tips in a Slider" data="7" />
        <mx:Object articleName="Downloading the latest Adobe Labs version of Flex 3 SDK/Flex Builder 3 (codename: Moxie)" data="6" />
    </mx:Array>
    <mx:ArrayCollection id="arrColl" source="{arr}" />
    <mx:DataGrid id="dataGrid" dataProvider="{arrColl}" variableRowHeight="true" width="100%" height="100%">
        <mx:columns>
            <mx:DataGridColumn id="articleName" dataField="articleName" headerText="Name of the article in question" wordWrap="true" />
            <mx:DataGridColumn id="data" dataField="data" headerText="ID of the article" />
        </mx:columns>
    </mx:DataGrid>
</mx:Application>