How to add sort capability to the web based XtraReport

This example illustrates how to add, and force to work, sorting option buttons to the header area of the web based report. Some key points of this example:

- Sorting is accomplished during the callback, which prevents full page post back (AJAX-oriented behavior).
- Callback raised from the client side by the ASPxClientCallbackPanel.PerformCallback method.
- FieldName of the column, on which the sorting action should take place and the Shift key pressed state is passed to the server as a callback parameter.
- XtraReport.HtmlItemCreated event handled, in order to insert sorting option buttons to the report header via the HtmlEventArgs.ContentCell parameter.