The command item feature of Telerik RadGrid is useful when you want to trigger commands directly from 
buttons/controls residing above the column headers. The visibility of the command item can be customized using the 
<strong>GridTableView.CommandItemDisplay</strong> property. 
<br/>
In the first grid from the demo the command item template is used to perform a 
selection-based editing functionality. When you select several items from the grid you
can edit, update or delete them at once. The command buttons also allow you to add new record
or refresh the data in the grid.
<br />
<br /> By default the command item displays <b>Add new record</b> and <b>Refresh</b> link 
buttons with images. 
<br /> 
<br />
The <strong>RadGrid.ItemCommand</strong> event will be fired
when a custom command bubbles from the CommandItem, which lets you define custom functionality
that can be executed in the <b>ItemCommand</b> handler. Additional major benefit is that all buttons 
(residing in the CommandItem) will automatically take advantage of the RadGrid AJAX mechanism,
without writing any extra code. 
<br />
<br />
Here are some more references concerning the <b>CommandItem</b> features:
<br/>
<a href="http://www.telerik.com/help/radcontrols/prometheus/?grdDefaultBehavior.html">Default behavior</a>
<br/>
<a href="http://www.telerik.com/help/radcontrols/prometheus/?grdCommandReference.html">Event bubbling</a>
<br/>
<a href="http://www.telerik.com/help/radcontrols/prometheus/?grdCommandItemTemplate.html">
CommandItemTemplate</a>