To get value of a ADFdropdown in backing bean without submit button

hi all,
It maybe a very easy thing to do ,but please could you help me with this as I am new to ADF?I have a dropdown whose value i need in my backing bean without the use of a submit button..
please do help me out!!!!

Hi Frank ,
Thank You for replying...
But even after autosubmit=true, it didnt work..
i shall post the code below,could u please throw more light on it?
<af:selectOneChoice value="#{bindings.fetchbusinessservicesVO1Pagename.inputValue}"
label="#{bindings.fetchbusinessservicesVO1Pagename.label}"
binding="#{GiveAccess.selectOneChoice1}"
id="selectOneChoice1" >
<f:selectItems value="#{bindings.fetchbusinessservicesVO1Pagename.items}"
binding="#{GiveAccess.selectItems1}"
id="selectItems1"/>
</af:selectOneChoice>
<af:commandButton text="commandButton 1"
binding="#{GiveAccess.commandButton1}"
id="commandButton1"
action="#{GiveAccess.getItemsList}"/>
When i use Command button it works fine..but i want the same functionality without the command button.(GiveAccess is the backing bean where i want the value from dropdown)

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