HOW TO: Add Up and Down Arrows to a Sortable GridView

Solution

• A Look at the GridView's New Sorting Styles in ASP.NET 4.0 by Scott Mitchell (4GuysFromRolla.com) - [ASP.NET 4.0] adding a sort arrow by using the new SortedAscendingHeaderStyle-CssClass and SortedDescendingHeaderStyle-CssClass GridView properties.
• Use an Up and Down arrow in the GridView's header columns by Fredrik Normen
• Extending the GridView to Include Sort Arrows by Scott Mitchell (4GuysFromRolla.com) - building a custom GridView server control (along with a custom BoundField control) in order to automatically display up and down arrow images for the sorted column.

Related Resources

• MSDN: GridView Class