Beverage Source Code

Beverage Example, source code file beverage.aspx

<%@ Page Language="C#" %>

public void btnSubmitOrder_Click(object sender, EventArgs e)
{
    string beverage, temperature, extras;
    
    beverage = radListBeverage.SelectedValue;
    temperature = radListTemperature.SelectedValue;
    if (chkListExtras.Items[0].Selected && chkListExtras.Items[1].Selected)
    {
        extras =  "with cream and sugar";
    }
    else if (chkListExtras.Items[0].Selected && !chkListExtras.Items[1].Selected)
    {
        extras =  "with cream";
    }
    else if (!chkListExtras.Items[0].Selected && chkListExtras.Items[1].Selected)
    {
        extras =  "with sugar";
    }
    else
    {
        extras = "";
    }
    litOrder.Text = "You ordered " + temperature + 
        " " + beverage + " " + extras + ".";
}

public void RadioButtonList_SelectedIndexChanged(object sender, EventArgs e)
{
    // Only cold orange juice is allowed.
    if (radListBeverage.SelectedValue == "oj")
    {
        radListTemperature.SelectedIndex = 0;
        chkListExtras.Items[0].Selected = false;
        chkListExtras.Items[1].Selected = false;
        radListTemperature.Enabled = false;
        chkListExtras.Enabled = false;
    }
    else
    {
        radListTemperature.Enabled = true;
        chkListExtras.Enabled = true;
        radListTemperature.Items[1].Selected = true;
    }
}

</script>

<html>

<head>
<title>beverage.aspx.aspx Example</title>
<link rel="stylesheet" type="text/css" href="../examples.css" />
</head>

<body>

<h2>Beverage Example</h2>

<p>Order your breakfast drink online.</p>

<p>Beverage<br /> 
<asp:RadioButtonList ID="radListBeverage" runat="server" AutoPostBack="true" 
    OnSelectedIndexChanged="RadioButtonList_SelectedIndexChanged">
    <asp:ListItem Value="coffee" Selected="True">Coffee</asp:ListItem>
    <asp:ListItem Value="oj">Orange Juice</asp:ListItem>
    <asp:ListItem Value="tea">Tea</asp:ListItem>
</asp:RadioButtonList>
</p>

<p>Temperature<br /> 
<asp:RadioButtonList ID="radListTemperature" runat="server" AutoPostBack="false">
    <asp:ListItem Value="cold">Cold</asp:ListItem>
    <asp:ListItem Value="hot" Selected="True">Hot</asp:ListItem>
</asp:RadioButtonList>
</p>

<p>Extras<br /> 
<asp:CheckBoxList ID="chkListExtras" runat="server" AutoPostBack="False">
    <asp:ListItem Selected="False">Cream</asp:ListItem>
    <asp:ListItem Selected="False">Sugar</asp:ListItem>
</asp:CheckBoxList>
</p>

</form>
</body>
</html>