In C# I need to Create a new WEB SITE with the following:-

1. Create a webpage that contains server side directives, code declaration blocks, includes and controls.
2. Create a simple calculator the contains four labels, three textboxes, six buttons and a list box:
3. The first label = enter first number
4. The second label= enter second number
5. The third label = should display the result
6. Four of the buttons should be "+", "-", "*", "/"
7. The result textbox should be read only
8. The startup page must be named index.
9. Display a message indicating cannot divide by when the user click / and there is a zero the in the second box
10. Prevent the user from entering text in the number fields
11. Create the other two buttons
    1. store data - The store data will store the results into array
    2. display data - The display data will display the contents of the array (use 10 for the array size)

I need some help with steps 9 11 on the server side for the C# website.

Heres what I have so far for the C# website and code behind:

Index.aspx:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Index.aspx.cs" Inherits="Calculator.Index" %>

Welcome to the C# Calculator!

Index.aspx.cs:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

namespace Calculator

{

public partial class Index : System.Web.UI.Page

{

double dec1stNum;

double dec2ndNum;

double decResult;

protected void Page_Load(object sender, EventArgs e)

{

}

protected void btnAdd_Click(object sender, EventArgs e)

{

//Accepts input from txt1stNum & txt2ndNum

double.TryParse(txt1stNum.Text, out dec1stNum);

double.TryParse(txt2ndNum.Text, out dec2ndNum);

//'Adds the 1st & 2nd numbers & displays the results

decResult = dec1stNum + dec2ndNum;

txtResult.Text = dec1stNum + " + " + dec2ndNum + " = " + decResult;

}

protected void btnSubtract_Click(object sender, EventArgs e)

{

//Accepts input from txt1stNum & txt2ndNum

double.TryParse(txt1stNum.Text, out dec1stNum);

double.TryParse(txt2ndNum.Text, out dec2ndNum);

//Subtracts the 2nd number from the 1st number & displays the results

decResult = dec1stNum - dec2ndNum;

txtResult.Text = dec1stNum + " - " + dec2ndNum + " = " + decResult;

}

protected void btnMultiply_Click(object sender, EventArgs e)

{

//Accepts input from txt1stNum & txt2ndNum

double.TryParse(txt1stNum.Text, out dec1stNum);

double.TryParse(txt2ndNum.Text, out dec2ndNum);

//Multiplies the 1st & 2nd numbers & displays the results

decResult = dec1stNum * dec2ndNum;

txtResult.Text = dec1stNum + " X " + dec2ndNum + " = " + decResult;

}

protected void btnDivide_Click(object sender, EventArgs e)

{

//Accepts input from txt1stNum & txt2ndNum

double.TryParse(txt1stNum.Text, out dec1stNum);

double.TryParse(txt2ndNum.Text, out dec2ndNum);

//Divides the 1st number by the 2nd number & displays the results

decResult = dec1stNum / dec2ndNum;

If dec2ndNum = 0;

Then;

txtResult.Text = dec1stNum + " / " + dec2ndNum + " = " + decResult;

End If;

}

}

}