franto.com

package com.flexets.components.dataGridClasses
{
	import mx.controls.dataGridClasses.DataGridColumn;
	import mx.utils.ObjectUtil;
 
	public class NumericDataGridColumn extends DataGridColumn
	{
		public static const NUMERIC:String = "N";
		public function NumericDataGridColumn(columnName:String=null)
		{
			super(columnName);
			initCompare(NUMERIC);
		}
 
		function initCompare(numeric:Object):void
		{
			if (numeric == NUMERIC) {
				sortCompareFunction = numericCompare;
			}
		}
 
		/**
		* Pull the numbers from the objects and call the implementation. TAKEN FROM mx.collections.SortField
		*/
		private function numericCompare(a:Object, b:Object):int
		{
			var fa:Number;
			try
			{
				fa = dataField == null ? Number(a) : Number(a[dataField]);
			}
			catch(error:Error)
			{
			}
 
			var fb:Number;
			try
			{
				fb = dataField == null ? Number(b) : Number(b[dataField]);
			}
			catch(error:Error)
			{
			}
 
			return ObjectUtil.numericCompare(fa, fb);
		}
	}
}

<mx:DataGrid id="myDG" width="100%" height="100%" dataProvider="{myDataProvider}">
    <mx:columns>
	<mx:DataGridColumn dataField="id"/>
	<dataGridClasses:NumericDataGridColumn dataField="order"/>
	<mx:DataGridColumn dataField="title"/>
	<dataGridClasses:NumericDataGridColumn dataField="price"/>
    </mx:columns>
</mx:DataGrid>