How to add checkbox values to list box

[Gill1978]

Hi,

Does anyone know how you can add the value of a checkbox (selected by user) to a listbox in the order that the user selects.

The users will select from a list of files in directory, and the locations will be added to a collection.

Any help with this would be much appreciated.

Thanks

J

 

[ca8msm]

On each CheckedChanged event of every CheckBox, add a new ListItem by using the Items.Add method.


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Mark,
[URL unfurl="true"]http://aspnetlibrary.com[/url]

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[jbenson001]

I would use a checkboxlist and set AutoPostBack = FALSE. Then on a button click, loop through the items in the list and check which ones are checked and add them to your collection. This way there is only one postback.

 

[Gill1978]

jbenson001 ... would have done it that way ... but the list box needs to be updated one by one when the user selects a file so that they can change the order of the files they select.

If it wasn't for that I would have gone your way ...

 

[jbenson001]

I guess I don't understand what you are doing.. I thought you wanted to select a bunch of chekboxes and add those checked values to a list box..

 

[jbenson001]

never mind .. I got it it now.. you can still do it my way and allow the user to change the order once it is in the listbox..

 

[Gill1978]

I've only just started with .NET and c# ... so I was thinking the easiest way ... still surfing for examples of how to add the values with Items.Add

So far I have :

    protected void CheckBoxList1_CheckedChanged(object sender, EventArgs e)
    {
        ListItem litem;
        litem.Value = this.Items(

        FileSelectedListBox.Items.Add()
    }

 

[Gill1978]

I think I have it (or something anyway) ...
However the OnSelectedIndexChanged="CheckBoxList1_CheckedChanged"
isn't firing and I can't see why ... here a snippet:

aspx file:

<%@ Page Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="Questionnaire.aspx.cs" Inherits="Questionnaire" Title="Untitled Page" %>

<asp:Content ID="Content1" ContentPlaceHolderID="CandlesPlaceHolder" Runat="Server">
    <asp:CheckBoxList ID="CheckBoxList1" runat="server"  OnSelectedIndexChanged="CheckBoxList1_CheckedChanged" >
        <asp:ListItem Text="Presentation 1" Value="V:/projects/JG/PitchBook/PitchBook/Presentations/Test1.ppt"></asp:ListItem>
    </asp:CheckBoxList>
    <asp:CheckBoxList ID="CheckBoxList2" runat="server">
        <asp:ListItem Text="Presentation 2" Value="V:/projects/JG/PitchBook/PitchBook/Presentations/Test2.ppt"></asp:ListItem>
    </asp:CheckBoxList>
    <asp:ListBox ID="FileSelectedListBox" runat="server"></asp:ListBox>
    
</asp:Content>

.cs file

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

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

    }
    public void CheckBoxList1_CheckedChanged(object sender, EventArgs e)
    {
        //ListItem litem;
        //litem.Value = this.Items(
        object i;
        FileSelectedListBox.Text = "<p>Selected Items(s):</p>";
        for (int i = 0; i <= CheckBoxList1.Items.Count - 1; i++)

            if (CheckBoxList1.Items(i).Selected)
            {
                FileSelectedListBox.Text += CheckBoxList1.Items(i).Text + "<br />";
            }
        
        //FileSelectedListBox.Items.Add(CheckBoxList1.Text);
    }
}

Thanks for any help ...

 

[Gill1978]

Here's the fix:

http://www.tek-tips.com/viewthread.cfm?qid=1367581&page=1

Thanks for the help!!!

J