RadControls for ASP.NET AJAX
Sets the page size for the respective GridTableView object.
The internal logic that is executed 'behind the scenes' when using this property to set the page size is to fire
command event with name 'PageSize'. For this purpose we use
the fireCommand client-side method of
the respective GridTableView client object. Then you can intercept
the ItemCommand server-side event of the
grid, check whether the executed command name is "PageSize" and specify the new number of items that
will be visualized on the current page.