On page load, radio button should be checked.

Hi I have a repeater control and 4 radio buttons at the top of it, on page load i want one of the radio buttons to be selected therefore it is always the one selected any time it loads. This is what I have so far, what do i need to do to achieve what i am trying to do. Thanks

 
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{

getData("productPrice"); //for now, this is your default

}

}

 
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