RadioButtonList

A RadioButtonList can be used to select 1 option within several options. The item "Pizza with egg" is selected by default.

    <asp:RadioButtonList ID="RadioButtonList1" runat="server">
                <asp:ListItem Selected="True">Pizza with egg</asp:ListItem>
<asp:ListItem>Pizza with tuna </asp:ListItem>
<asp:ListItem>Pizza with ham</asp:ListItem>

   </asp:RadioButtonList>

Set selected item from Database

If you load Data from a database you sometimes want to select a certain item based on the value in the DB.

You can do so by doing the following:

    string pizzaOptionFromDB = someCode.getPizzaFromDB();  // DB returns  "Pizza with tuna" 
    ListItem li = RadioButtonList1.Items.FindByValue(pizzaOptionFromDB);
    if (li != null)
        {
            li.Selected = true;
        }

This selects the ListItem with the string "Pizza with tuna".