example Week 4.txt

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class _CurrencyConverter : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            fromCurrencyDropDown.Items.Add(new ListItem("INR", "65.3"));
            fromCurrencyDropDown.Items.Add(new ListItem("Japanese Yen", "110.33"));
            fromCurrencyDropDown.Items.Add(new ListItem("Euro", "0.85"));
        }
    }
    protected void SubmitClickedEvent(object sender, EventArgs e)
    {
        string convertedValue = convertCurrency();
        labelAns.Text = convertedValue.ToString();
    }
    string convertCurrency()
    {
        double oldValue = 0;
        double newValue = 0;
        double.TryParse(inputCurrency.Text, out oldValue);
        ListItem temp = fromCurrencyDropDown.Items[fromCurrencyDropDown.SelectedIndex];
        newValue = oldValue * double.Parse(temp.Value);
        string s = oldValue.ToString() + " USD = " + newValue.ToString() + " " + temp.Text;
        return s;
    }
}
-----------------------------------------------------------------
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="CurrencyConverter.aspx.cs" Inherits="_CurrencyConverter" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Label runat="server" id="Label1" text="Input Currency"></asp:Label> 
            <asp:TextBox runat="server" id="inputCurrency"/></asp:textbox> 
            <asp:Label id="fromLable" runat="server" text="From USD to"></asp:Label> 
            <asp:DropDownList id="fromCurrencyDropDown" runat="server"></asp:DropDownList>
            <br> <br> 
                <asp:Label runat="server" id="labelAns"></asp:Label> 
            <br> <br>
            <asp:Button Text="Convert!" OnClick="SubmitClickedEvent" runat="server"></asp:Button>
            <br><br>
    </div>
    </form>
</body>
</html>