Re: ListBox will not populate

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From: Alex Feinman [MVP] (public_news_at_alexfeinman.com)
Date: 01/26/05 

Date: Wed, 26 Jan 2005 01:07:08 -0800

Wrong group.
As for you code, remove the following from the Rage directive:

Codebehind="WebForm1.aspx.cs" AutoEventWireup="false"
Inherits="CH5_ListBoxes.WebForm1" 

-- 
Alex Feinman
---
Visit http://www.opennetcf.org
"google_me" <ben.ong@natoil.com> wrote in message 
news:1106696867.111790.111360@f14g2000cwb.googlegroups.com...
> Hi,
> I was doing some C#/ASP.NET examples from an O'Reilly book.
>
> I have this sample of code :
> <%@ Page language="c#" Codebehind="WebForm1.aspx.cs"
> AutoEventWireup="false" Inherits="CH5_ListBoxes.WebForm1" %>
> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
> <HTML>
> <HEAD>
> <title>ASP List Box Control</title>
> <script runat="server">
> void Page_Load(Object sender, EventArgs e)
> {
> // Put user code to initialize the page here
> if (!IsPostBack)
> {
> // Build 2 dim array for the lists
> // First dimension contains book name
> // 2nd dimension contains ISBN number
>
> string[,] books = {
> {"Programming C#", "0596001177"},
> {"Programming ASP.NET", "0596001711"},
> {"WebClasses From Scratch", "0789721260"},
> {"Teach Yourself C++", "06723072X"},
> {"Teach Yourself C++ in 10 Minutes", "067231603X"},
> {"XML & Java from Scratch", "0789724766"},
> {"Complete Idiots Guide to a Career in Computer Programming",
> "0789719959"},
> {"XML Web Documents from Scratch", "0789723166"},
> {"Clouds to Code", "1861000952"},
> {"C++: An Introduction to Programming", "1575760614"},
> {"C++ Unleased", "06723122395"}
> };
> // Populate the Lists
> int i;
> for (i=0; i < books.GetLength(0); i++)
> {
> //add both text and value
> lbSingle.Items.Add(new ListItem(books[i,0], books[i,1]));
> lbMulti.Items.Add(new ListItem(books[i,0], books[i,1]));
> }
> }
> }
>
> void lbSingle_SelectedIndexChanged(Object Source, EventArgs E)
> {
> //Check to verify that something has been selected.
> if(lbSingle.SelectedIndex != -1)
> {
> lblLbSingle.Text=lbSingle.SelectedItem.Text + "----> ISBN: " +
> lbSingle.SelectedItem.Value;
> }
> }
> void lbMulti_SelectedIndexChanged(Object Source, EventArgs E)
> {
> string str = "";
> foreach(ListItem li in lbMulti.Items)
> {
> if(li.Selected ==true)
> {
> str += "<br/>" + li.Text + " ----> ISBN: " + li.Value;
> }
> }
> if (str.Length == 0)
> lblLbMulti.Text ="No books selected.";
> else
> lblLbMulti.Text = str;
> }
> </script>
> <meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
> <meta name="CODE_LANGUAGE" Content="C#">
> <meta name="vs_defaultClientScript" content="JavaScript">
> <meta name="vs_targetSchema"
> content="http://schemas.microsoft.com/intellisense/ie5">
> </HEAD>
> <body MS_POSITIONING="GridLayout">
> <form id="Form1" method="post" runat="server">
> <h1>ASP Controls</h1>
> <h2>List Box</h2>
>
> <h3>ListBox - single selection</h3>
> <asp:ListBox
> id="lbSingle"
> autoPostBack="True"
> rows="6"
> selectionMode="Single"
> onSelectedIndexChanged="lbSingle_SelectedIndexChanged"
> runat="server" />
>
> <br/>
> <asp:Label ID="lblLbSingle" Runat="server" />
> <br/>
>
> <h3>ListBox - multiple selection</h3>
> <asp:ListBox
> id="lbMulti"
> autoPostBack="True"
> selectionMode="Multiple"
> onSelectedIndexChanged="lbMulti_SelectedIndexChanged"
> runat="server" />
> <asp:Label ID="lblLbMulti" Runat="server" />
> </form>
> </body>
> </HTML>
> ... everything compiles but for some reason when the page is brought up
> the list box is not populated with the data found in the "books" array.
> Any help will be great.
>
> Thanks,
>
> Ben
>

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