How to display checkboxlist values in a listbox without using of button in asp.net ?

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I have a checkboxlist and it's values are "Max Payne","Hitman","Call Of Duty" etc. Now my question is that whenever i"ll click on any or all of these checkboxes then there values("Max Payne","Hitman" etc.) will be displayed in a listbox(listbox is there in my webform). please give full coding in C#.
Thanx in advance.....

Posted 18-Jan-13 4:34am

Chiklu.Soumya

Updated 18-Jan-13 5:24am

fjdiewornncalwe

v2

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adriancs · Answer 1 · 2013-01-18T04:54:00

Solution 1

This is not a full coding, its more like hints.
However, I do feel that it is almost near a full coding.

try to fill in the blanks for the rest.

Every control in ASP.NET has a property called AutoPostBack.
AutoPostBack is functioned like a button's click event.
If there is any changes made to control, it will carry out a postback event.
Next, the ASP.NET control need a action event for you to handle in code behind.
In your case, you need the CheckBoxList's SelectedIndexChanged action event.

Example of coding in ASP.NET page:

XML

<asp:CheckBoxList ID="CheckBoxList1" runat="server" AutoPostBack="True"
    onselectedindexchanged="CheckBoxList1_SelectedIndexChanged">
</asp:CheckBoxList>

This will handle the postback event of selected index changed:

C#

protected void CheckBoxList1_SelectedIndexChanged(object sender, EventArgs e)
{
    // Do something
}

Example of coding in code behind

C#

protected void Page_Load(object sender, EventArgs e)
{
    CheckBoxList1.AutoPostBack = true;
    CheckBoxList1.SelectedIndexChanged += new EventHandler(CheckBoxList1_SelectedIndexChanged);
}

protected void CheckBoxList1_SelectedIndexChanged(object sender, EventArgs e)
{
    // Do something
}

Posted 18-Jan-13 4:54am

adriancs

Updated 18-Jan-13 5:05am

v4

Comments

fjdiewornncalwe 18-Jan-13 11:25am

+5. Nice. You've given enough information to get him started without giving him all the details so he has to think a bit for himself.

Chiklu.Soumya 18-Jan-13 11:58am

I"m completely new to asp .net and don't know anything. Excuse my mistakes. Please try to solve my code. My requirement is:"whenever i"ll click on one or more checkboxlist there value/s will be displayed on listbox." Thanks.....

<form id="form1" runat="server">
<div>

<asp:CheckBoxList ID="CheckBoxList1" runat="server" AutoPostBack="True"
onselectedindexchanged="CheckBoxList1_SelectedIndexChanged">
<asp:ListItem>Max Payne
<asp:ListItem>Call Of Duty
<asp:ListItem>Hitman
<asp:ListItem>Shader
<asp:ListItem>Mafia

</div>
<asp:ListBox ID="ListBox1" runat="server" Height="146px" Width="134px">

</form>

protected void Page_Load(object sender, EventArgs e)
{
CheckBoxList1.SelectedIndexChanged += new EventHandler(CheckBoxList1_SelectedIndexChanged);
}
protected void CheckBoxList1_SelectedIndexChanged(object sender, EventArgs e)
{
ListBox1.Items.Add(CheckBoxList1.SelectedItem.ToString());
}

adriancs 18-Jan-13 12:06pm

Hi, your question asked that how to do it without a button. So which means you know how to do it if using a button?

by the way, if you declare the CheckBoxList1_SelectedIndexChanged event in ASP.NET page like this:

<asp:CheckBoxList ID="CheckBoxList1" runat="server" AutoPostBack="True" 
onselectedindexchanged="CheckBoxList1_SelectedIndexChanged">

You don't need to declare it in code behind:

protected void Page_Load(object sender, EventArgs e)
{
    CheckBoxList1.SelectedIndexChanged += new EventHandler(CheckBoxList1_SelectedIndexChanged);
}

and if you do it in code behind, you won't have to do it in ASP.NET page.

Chiklu.Soumya 18-Jan-13 12:26pm

Don't know how to display values using button. Please give me a full code for my convenience. Bcoz i"m completely new to asp.net.

adriancs 18-Jan-13 12:58pm

new to asp.net is not a problem. here,

for tutorial of using ListBox, you may have a look at here:
http://www.dotnetspark.com/kb/637-simple-example-with--listbox.aspx

for tutorial of using CheckBoxList, you may have a look at here:
http://www.youtube.com/watch?v=xmJPxCn3s0Q
http://www.dotnetcurry.com/ShowArticle.aspx?ID=77

you may post back comments if you have any question.

adriancs 18-Jan-13 13:20pm

To the best advise for beginner of ASP.NET

ASP.NET is a technology that built on top of HTML, CSS and JAVASCRIPT.
Before you start with ASP.NET, you must get your feet wet into html and css.

have some patient, read all through the topic about html at here:
http://www.w3schools.com/html/default.asp

then read all the topic about css at here:
http://www.w3schools.com/css/default.asp

then try to have some understanding of Javascript at here:
http://www.w3schools.com/js/default.asp

Without the knowledge of these 3, you will feel that something seems to be missing and you can't really perform.

ASP.NET can be described as a dynamic html generator. At the mean time ASP.NET runs processing logic in behind, it also generates HTML document and transmits it through internet to your client. And Javascript helps to process logic at client's computer. Javascript can dynamically generates or change the HTML at client's computer too. Javascript also helps to collect data from client and post it back to server for C# to process data.

Understanding HTML, CSS and Javascript will help you to understand the life circle of website better. You will eventually find that, ASP.NET do not fully generate all the HTML for you. Some of the parts will still require you to write HTML syntax manually. ASP.NET will help you combine the HTML syntax.

After that you can start to learn ASP.NET.
Here is a very good book for you to start off as a beginner.
A very nice book to read: Download this:
Beginning ASP.NET 3.5 in C# 2008 From Novice to Professional
http://www.mediafire.com/view/?f24w1mwfl52b4jd

Chiklu.Soumya 19-Jan-13 8:47am

Dear Adriancs thank u very much for ur useful links and special thanks for the asp.net ebook link.I"m remained ever grateful to you for your kind advice.

adriancs 19-Jan-13 9:54am

Good luck. :)

adriancs 19-Jan-13 10:05am

this is the code:

protected void Page_Load(object sender, EventArgs e)
{
    CheckBoxList1.AutoPostBack = true;
    CheckBoxList1.SelectedIndexChanged += new EventHandler(CheckBoxList1_SelectedIndexChanged);
}

void CheckBoxList1_SelectedIndexChanged(object sender, EventArgs e)
{
    ListBox1.Items.Clear();
    foreach (ListItem li in CheckBoxList1.Items)
    {
        if (li.Selected)
        {
            ListBox1.Items.Add(li.Text);
        }
    }
}

Chiklu.Soumya 19-Jan-13 12:15pm

Thank You Very Much. It works fine.

How to display checkboxlist values in a listbox without using of button in asp.net ?

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How to display checkboxlist values in a listbox without using of button in asp.net ?

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