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The server-side OnDropDownSelectedIndexChanged event occurs when the user clicks on item in the DropDown, causing a postback.

The event handler function receives two arguments:

  1. The RadRibbonBar which has fired the event. This argument is of type object, but can be cast to the RadRibbonBar type.

  2. An EventArgs object.This object has a number of properties for handling the request for the items:

    • Index – index of the newly selected item.

    • Item – the newly selected item.

    • DropDown – the DropDown which fired the event.

    • Group – the group in which the DropDown is placed.

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