hi I'm using VS express for web and I'm using C#
I know how to replace value in arrraylist in java , but I found it hard to do it in c#
in the designe view in VS I have add button and textBox.. first I need to get what the user chose from the listBox and get the quantinty, but if the user chose the same product again , but with diffrenet quantity then the quantity in the output (lable) should change
this is the list of items
http://s3.postimage.org/gafmb5upv/list.png
and here is the outout http://s12.postimage.org/eqwr86ntp/output.png
here is my code
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Collections;
public partial class Menu_Order : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
ArrayList ar = BuildItems();
ArrayList temp = new ArrayList();
foreach (Item it in ar)
{
ListItem li = new ListItem(it.Desc + "," + it.Price , it.ID.ToString());
ListBox2.Items.Add(li);
}
//defualt value
ListBox2.SelectedIndex = 0;
TextBox1.Text = "1";
}
}
ArrayList BuildItems(){
ArrayList temp = new ArrayList();
temp.Add(new Item (11, "Burger", 15));
temp.Add(new Item(12, "Cheese Burger", 20));
temp.Add(new Item(13, "Kebab", 24));
temp.Add(new Item(20, "Chiken Schawerma", 18));
temp.Add(new Item(22, "Beef Schawerma", 20));
temp.Add(new Item(35, "Grilled Chiken", 25));
temp.Add(new Item(34, "Grilled Fish", 22));
temp.Add(new Item(40, "Big Pizza", 18));
temp.Add(new Item(42, "Small Pizza", 14));
temp.Add(new Item(50, "Falafel", 10));
return temp;
}
void DisplayList(ArrayList temp)
{
Label1.Text = "<table>";
Label1.Text = Label1.Text + "<tr><td>" + "ID"
+ "</td><td>" + "Description" + "</td><td>" + "Price" + "</td><td>" + "Quantity" + "</td><td>" + "Amount" + "</td></tr>";
foreach (OrderedItem s in temp)
{
Label1.Text = Label1.Text + "<tr><td>" + s.ID+ "</td><td>" + s.Desc + "</td><td>" + s.Price + "</td><td>" + s.Qt +"</td><td>"+ s.Qt * s.Price + "</td></tr>";
}
Label1.Text = Label1.Text + "</table>";
}
protected void Button1_Click1(object sender, EventArgs e)
{
string choice = ListBox2.SelectedItem.Text;
string [] p = choice.Split(',');
string des = p[0];
int price = int.Parse(p[1]);
int id = int.Parse(ListBox2.SelectedValue);
int qt = int.Parse(TextBox1.Text);
OrderedItem a = new OrderedItem(id, des, qt, price);
ArrayList savedItem = new ArrayList();
if (Session["items"] != null)
{
savedItem = (ArrayList)Session["items"];
}
savedItem.Add(a);
Session["items"] = savedItem;
DisplayList(savedItem);
}
}
