aspx:FieldRadioPicklist
This is a HTML input element that renders a group of HTML radio buttons, shows picklist values as radio buttons, and allows the user to have one selection.
<aspx:FieldRadioPicklist runat='server' value='{!Model.FoodChoice__c}' />
You can populate the options declaratively:
<aspx:FieldRadioPicklist runat='server' value='{!Model.FoodChoice__c}'>
<items>
<asp:ListItem text="Pizza" value="1"/>
<asp:ListItem text="Burger" value="2"/>
</items>
</aspx:FieldRadioPicklist>
You also load the option from values stored in Model or DataBag:
<aspx:FieldRadioPicklist runat='server' value='{!Model.FoodChoice__c}' DataSource='<%# DataBag.Foods %>' DataTextField='Name' DataValueField='Id'>
</aspx:FieldRadioPicklist>