📄 demo-ifelseif.aspx
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<%@ Page Language="C#" %>
<script runat="server">
void page_Load()
{
if(Page.IsPostBack)
{
if(chkIsMember.Checked==true)
{
lblOut.Text = "Members get a free ticket";
lblOut.BackColor=System.Drawing.Color.LightPink;
}
else if(Convert.ToInt32(txtAge.Text)<=18)
{
lblOut.Text = "Students get a free ticket";
lblOut.BackColor=System.Drawing.Color.LightPink;
}
else
{
lblOut.Text = "Price is ¥500";
lblOut.BackColor=System.Drawing.Color.LightSeaGreen;
}
} //end if(Page.IsPostBack)
} //end page_Load()
</script>
<html>
<head>
</head>
<body>
All members get a free ticket
<br />
Students (age 18 and under) get a free ticket
<br />
For others price is ¥500
<br />
<form runat="server">
Please enter your age
<asp:TextBox id="txtAge" runat="server"></asp:TextBox>
<br />
Are you a member?
<asp:CheckBox id="chkIsMember" runat="server"></asp:CheckBox>
<asp:Button id="Button1" runat="server" Text="Submit"></asp:Button>
<br />
<asp:Label id="lblOut" runat="server"></asp:Label>
<br />
</form>
</body>
</html>
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