Occurs on the client side before the drop down window is closed and allows you to cancel the operation.
The QueryCloseUp event handler receives an argument of the ASPxClientCancelEventArgs type. The following properties provide information specific to this event.
|cancel||Gets or sets a value indicating whether the action which raised the event should be canceled.|
Each time a drop down window is going to be closed on the client side, the QueryCloseUp event occurs. You can cancel closing the window by setting the ASPxClientCancelEventArgs.cancel property to true.