How to delete a session variable showing in a dynamically created table

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hi.
i am trying to do a shopping cart project where whenever u add some product to the cart i will store in a session array with 3 variables. its a spectacle shop so.3 things are to be added into array is pid,total no of amount and lens type.bt that's not the big issue.
I have done the part to add the product details into an array. and showing the array in a dynamically created array. here in the table whenever its showing the details its created a delete button. now i have stuck to delete the product details from session whenever user click a particular button to delete a product from cart.

webapplication1 --->> here i am adding the details in 3 textboxes. and in webapplication2 its showing the array along with the delete button..

and the array is created in the cart.cs

webapplication1.aspx

XML

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication25.WebForm1" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
        <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
        <asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>
        <br />
        <asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" />
        <asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl="~/WebForm2.aspx">View table</asp:HyperLink>
    </div>
    </form>
</body>
</html

>

webapplication1.cs

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using WebApplication_Cart;

namespace WebApplication25
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            Cart_array c = new Cart_array();
            Cart obj = new Cart();
            obj.pid = TextBox1.Text;
            obj.amount = Convert.ToInt32(TextBox2.Text);
            obj.lens_type = TextBox3.Text;
            if (Session["cart"] == null)
            {
                c.add(obj);
                Session["cart"] = c;
            }
            if (Session["cart"] != null)
            {
                //WebApplication_Cart.Cart_array obj2 = new WebApplication_Cart.Cart_array();
                //obj2 = (WebApplication_Cart.Cart_array)Session["cart"];
                c = (WebApplication_Cart.Cart_array)Session["cart"];
                c.add(obj);
            }
        }
    }

}

webapplication2.aspx

XML

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm2.aspx.cs" Inherits="WebApplication25.WebForm2" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Label ID="Label1" runat="server" Text=""></asp:Label>

        <br />
        <asp:Table ID="tblName" runat="server" BorderWidth="1px">
        </asp:Table>

        <br />

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

>

webapplication2.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using WebApplication_Cart;

namespace WebApplication25
{
public partial class WebForm2 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (Session["cart"] != null)
{
WebApplication_Cart.Cart_array obj1 = new WebApplication_Cart.Cart_array();
obj1=(WebApplication_Cart.Cart_array) Session["cart"];
for (int i = 0; i < obj1.len; i++)
{
TableRow t = new TableRow();
TableCell c1 = new TableCell();
TableCell c2 = new TableCell();
TableCell c3 = new TableCell();
TableCell tcButton = new TableCell();
Button btn = new Button();
c1.Text = obj1.obj[i].pid.ToString();
c2.Text = obj1.obj[i].amount.ToString();
c3.Text = obj1.obj[i].lens_type.ToString();
btn.Text = "delete";
tcButton.Controls.Add(btn);
t.Cells.Add(c1);
t.Cells.Add(c2);
t.Cells.Add(c3);
t.Cells.Add(tcButton);

tblName.Rows.Add(t);
//Label1.Text = obj1.obj[i].pid.ToString();
Label1.Text += obj1.obj[i].pid.ToString() +obj1.obj[i].amount.ToString() + obj1.obj[i].lens_type.ToString();
}
}
}
}
}

cart.cs

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace WebApplication_Cart
{
    public class Cart
    {
        public string pid,lens_type;
        public int amount;
        private int p;

        /*public Cart(int p)
        {
            // TODO: Complete member initialization
            this.p = p;
        }*/

    }
    public class Cart_array
    {
        public Cart[] obj;
        public int len;
        public Cart_array()
        {
            len = 0;
            obj = new Cart[10];
            for (int i = 0; i < 10; i++)
            {
                obj[i] = new Cart();
            }
        }
        public void add(Cart e)
        {
            obj[len].pid = e.pid;
            obj[len].amount = e.amount;
            obj[len].lens_type = e.lens_type;
            len++;

        }

    }
}

pls help me out..
thank u

Posted 29-Apr-13 5:25am

Arkadeep De

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Comments

ZurdoDev 29-Apr-13 11:39am

Sorry, too much code for me to read through and try to make sense. But, to answer your post title, just do Session[variable] = null;

Thanks7872 30-Apr-13 0:22am

try posting the smallest code snippet possible.No one would like to go through this lengthy code and find out the solution. Mention clearly at which line or a code block you need help and whats the issue?if you want to clear just the session then Session[xyz]= null is the solution.what else you need.be more specific.

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