on listbox selected index changed problem

Question

2.67/5 (3 votes)

See more:

In my project I bind a listbox1 with say 60px height. When I select an item (for raising another listbox2, using the selected item) that is beneath the 60px height using vertical scroll bar, the status of the listbox is returning back to the first position thereby the selected item goes unknown for the user. Is there any facility to retain the status of listbox on that selected item itself.
Regards.

C#

protected void ListBox1_SelectedIndexChanged(object sender, EventArgs e) 
{ 
	if (ListBox1.SelectedIndex == 0) 
	{ 
	
	} 
	else 
	{ 
		SqlDataAdapter da1 = new SqlDataAdapter("select block_name,block_code from block where dist_code='" + v_dist_code + "'", con); 
		SqlCommandBuilder cb1 = new SqlCommandBuilder(da1); 
		DataSet ds1 = new DataSet("block"); 
		da1.Fill(ds1, "block"); 
		for (int i = 0; i < ds1.Tables[0].Rows.Count; i++) 
		{ 
			List adds1 = new List(); 
			adds1.Add(ds1.Tables[0].Rows[i].ItemArray[0].ToString()); 
			string name1 = ds1.Tables[0].Rows[i]["block_name"].ToString(); 
			if (name1 == ListBox1.SelectedValue) 
			{ 
				v_block_code = Convert.ToInt32(ds1.Tables[0].Rows[i]["block_code"].ToString()); 
			}
				
		} 
	}
	
// once an item is selected the position of listbox goes to top and things happens as reported.

[EDIT]David_Wimbley: Moved code from comment to question[/EDIT]

// This problem only with VS2008 R2 and not with VS2008!

Posted 16-Jan-13 21:27pm

S.Rajendran from Coimbatore

Updated 19-Jan-13 1:48am

v3

Add a Solution

Comments

Ram Kumar(Webunitech) 17-Jan-13 3:31am

hey can u post your code then we will do better for you. otherwise you can dynamic add height on selectedchangeindex its maintain your height.

Mohd. Mukhtar 17-Jan-13 3:35am

What have you tried so for? Please copy some code snippet here.

vinodkumarnie 17-Jan-13 4:55am

It seems easy to resolve if you Post your code. So please post code.

S.Rajendran from Coimbatore 17-Jan-13 4:56am

protected void ListBox1_SelectedIndexChanged(object sender, EventArgs e)
{
if (ListBox1.SelectedIndex == 0)
{
}
else
{
SqlDataAdapter da1 = new SqlDataAdapter("select block_name,block_code from block where dist_code='" + v_dist_code + "'", con);
SqlCommandBuilder cb1 = new SqlCommandBuilder(da1);
DataSet ds1 = new DataSet("block");
da1.Fill(ds1, "block");
for (int i = 0; i < ds1.Tables[0].Rows.Count; i++)
{
List<string> adds1 = new List<string>();
adds1.Add(ds1.Tables[0].Rows[i].ItemArray[0].ToString());
string name1 = ds1.Tables[0].Rows[i]["block_name"].ToString();
if (name1 == ListBox1.SelectedValue)
{
v_block_code = Convert.ToInt32(ds1.Tables[0].Rows[i]["block_code"].ToString());
}
}
- once an item is selected the position of listbox goes to top and things happens as reported.

Richard C Bishop 17-Jan-13 16:04pm

You need to use the "Improve Question" widget to add the code to your thread.

S.Rajendran from Coimbatore 19-Jan-13 7:47am

The problem happens only when I use VS 2008 R2. In VS2008 no problem. Today I found it.

S.Rajendran from Coimbatore 19-Jan-13 21:42pm

Well, there is a correction. It is not VS 2008 R2..it is VS2008 team system.

1 solution

Add a Solution

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

vinodkumarnie · Answer 1 · 2013-01-18T17:14:00

Please try this..

XML

<script src="jquery-1.4.2.js" type="text/javascript"></script>
    <script type="text/javascript">
    $(document).ready(function() {
    $('#btnRight').click(function(e) {
        var selectedOpts = $('#lstBox1 option:selected');
        if (selectedOpts.length == 0) {
            alert("Nothing to move.");
            e.preventDefault();
        }

        $('#lstBox2').append($(selectedOpts).clone());
        $(selectedOpts).remove();
        e.preventDefault();
    });

    $('#btnLeft').click(function(e) {
        var selectedOpts = $('#lstBox2 option:selected');
        if (selectedOpts.length == 0) {
            alert("Nothing to move.");
            e.preventDefault();
        }

        $('#lstBox1').append($(selectedOpts).clone());
        $(selectedOpts).remove();
        e.preventDefault();
    });
});
    </script>

XML

<table style='width: 370px;'>
            <tr>
                <td style='width: 160px;'>
                    <b>Group 1:</b><br />
                    <select multiple="multiple" id='lstBox1'>
                        <option value="ajax">Ajax</option>
                        <option value="jquery">jQuery</option>
                        <option value="javascript">JavaScript</option>
                        <option value="mootool">MooTools</option>
                        <option value="prototype">Prototype</option>
                        <option value="dojo">Dojo</option>
                    </select>
                </td>
                <td style='width: 50px; text-align: center; vertical-align: middle;'>
                    <input type='button' id='btnRight' value='  >  ' />
                    <br />
                    <input type='button' id='btnLeft' value='  <  ' />
                </td>
                <td style='width: 160px;'>
                    <b>Group 2: </b>
                    <br />
                    <select multiple="multiple" id='lstBox2'>
                        <option value="asp">ASP.NET</option>
                        <option value="c#">C#</option>
                        <option value="vb">VB.NET</option>
                        <option value="java">Java</option>
                        <option value="php">PHP</option>
                        <option value="python">Python</option>
                    </select>
                </td>
            </tr>
        </table>

Hope it work well...

Thank you..

on listbox selected index changed problem

1 solution

Solution 1

Add your solution here

Preview 0

on listbox selected index changed problem

1 solution

Solution 1

Add your solution here

Preview 0

Existing Members

...or Join us