How to determine currently sorted header column in data grid?

I want to know which header the user clicked on to give the currently sorted view. Is there an API in flex framework that I开发者_StackOverflow中文版 can use to achieve this? Hopefully I can get back a column index so I know how it is currently sorted.

Thanks, Mike

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The mx.controls.DataGrid has a property named columns. Each column in this collection is an object of type mx.controls.dataGridClasses.DataGridColumn with a boolean property named sortDescending.

Otherwise, you can receive and handle the DataGrid event headerRelease. This event is transmitted when the user releases the mouse button on a column header, causing the column to become sorted.