The following example(s) require Flash Player 10 and the beta Adobe Flex Hero SDK. To download the Adobe Flash Builder 4 trial, see http://www.adobe.com/products/flex/. To download the latest nightly build of the Flex Hero SDK, see http://opensource.adobe.com/wiki/display/flexsdk/Download+Flex+Hero.

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2010/10/24/setting-explicit-columns-on-a-spark-datagrid-control-in-flex-hero/ -->
<s:Application name="Spark_DataGrid_columns_test"
        xmlns:fx="http://ns.adobe.com/mxml/2009" 
        xmlns:s="library://ns.adobe.com/flex/spark" 
        xmlns:mx="library://ns.adobe.com/flex/mx">
 
    <s:DataGrid id="dg" horizontalCenter="0" verticalCenter="0">
        <s:columns>
            <s:ArrayList>
                <s:GridColumn dataField="fontName" />
            </s:ArrayList>
        </s:columns>
        <s:dataProvider>
            <s:ArrayList source="{Font.enumerateFonts(true).sortOn('fontName')}" />
        </s:dataProvider>
    </s:DataGrid>
 
</s:Application>

This entry is based on a beta version of the Flex Hero SDK and therefore is very likely to change as development of the Flex SDK continues. The API can (and will) change causing examples to possibly not compile in newer versions of the Flex Hero SDK.

 

Full code after the jump.

View MXML

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/03/04/dynamically-adding-new-columns-to-a-datagrid-control-in-flex/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white">

    <mx:Script>
        <![CDATA[
            import mx.controls.dataGridClasses.DataGridColumn;

            private function addDataGridColumn(dataField:String):void {
                var dgc:DataGridColumn = new DataGridColumn(dataField);
                var cols:Array = dataGrid.columns;
                cols.push(dgc);
                dataGrid.columns = cols;
            }

            private function init():void {
                addDataGridColumn("col4");
            }
        ]]>
    </mx:Script>

    <mx:ArrayCollection id="arrColl">
        <mx:source>
            <mx:Array>
                <mx:Object col1="A.1" col2="A.2" col3="A.3" col4="A.4"/>
                <mx:Object col1="B.1" col2="B.2" col3="B.3" col4="B.4"/>
                <mx:Object col1="C.1" col2="C.2" col3="C.3" col4="C.4"/>
                <mx:Object col1="D.1" col2="D.2" col3="D.3" col4="D.4"/>
                <mx:Object col1="E.1" col2="E.2" col3="E.3" col4="E.4"/>
                <mx:Object col1="F.1" col2="F.2" col3="F.3" col4="F.4"/>
            </mx:Array>
        </mx:source>
    </mx:ArrayCollection>

    <mx:ApplicationControlBar dock="true">
        <mx:Button label="Add column" click="init();" />
    </mx:ApplicationControlBar>

    <mx:DataGrid id="dataGrid"
            dataProvider="{arrColl}"
            width="400"
            rowCount="6">
        <mx:columns>
            <mx:DataGridColumn dataField="col1" />
            <mx:DataGridColumn dataField="col2" />
            <mx:DataGridColumn dataField="col3" />
        </mx:columns>
    </mx:DataGrid>

</mx:Application>

View source is enabled in the following example.