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The OnClientClearButtonClicking client-side event immediately when the Clear button in the entry area of the RadDropDownTree is clicked.

The event handler receives two parameters:

  1. The instance of the RadDropDownTree client-side object.

  2. An Event argument parameter.

The event can be cancelled - simply set args.set_cancel to true - args.set_cancel(true); from the event handler and the RadDropDownTree dropdown will not be opened.

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