Slip-7 Q.A) Problem Statement
Q. Write an ASP.Net program to accept a number from the user in a textbox control and throw an exception if the number is not a perfect number. Assume suitable controls on the web form. 15 Marks
Answer:
Default.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication5.WebForm1" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h2>Check Perfect Number</h2>
Enter a Number :
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<br /><br />
<asp:Button ID="btnCheck" runat="server"
Text="Check"
OnClick="btnCheck_Click" />
<br /><br />
<asp:Label ID="Label2" runat="server"
ForeColor="Red"></asp:Label>
</div>
</form>
</body>
</html>
Default.aspx.cs
using System;
namespace WebApplication5
{
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnCheck_Click(object sender, EventArgs e)
{
int number = Convert.ToInt32(TextBox1.Text);
if (IsPerfectNumber(number))
{
Label2.Text = number + " is a Perfect Number";
}
else
{
Label2.Text = number + " is not a Perfect Number";
}
}
private bool IsPerfectNumber(int number)
{
int sum = 0;
for (int i = 1; i <= number / 2; i++)
{
if (number % i == 0)
{
sum = sum + i;
}
}
if (sum == number)
return true;
else
return false;
}
}
}