how to keep the selected item of listbox selected

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Hi,
I have a listbox in which three list items have been hard coded.

<td align="justify">
                            <asp:ListBox ID="ListBox1" Width="200" SelectionMode="Multiple" runat="server" >
                            <asp:ListItem Text= "SP" Value= "1">
                            <asp:ListItem Text= "SC" Value= "2" >
                            <asp:ListItem Text= "TA" Value= "4" >       
                   
                           
                        </td>

I intend to keep the selected item selected(highlighted) when i check it again.
Please guide how can it be done.

Posted 13-Apr-11 23:39pm

Aksh@169

Updated 14-Apr-11 0:04am

BobJanova

v3

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BobJanova 14-Apr-11 6:05am

Edited to add ASP.net tag.

3 solutions

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Pong D. Panda · Answer 1 · 2011-04-13T23:41:00

Solution 1

<asp:ListItem Text="SP" Value= "1" Selected="true" ></asp:ListItem>

Update :

Before leaving the page, you can store your selected value in a Session.

Session["SelectedListItem"] = ListBox1.SelectedValue;

And on your PageLoad, you can check the Session["SelectedListItem"] if it has value and set it.

if (Session["SelectedListItem"] != null) {
   ListBox1.SelectedValue = (string)Session["SelectedListItem"];
}

Posted 13-Apr-11 23:41pm

Pong D. Panda

Updated 14-Apr-11 0:09am

v2

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Aksh@169 14-Apr-11 5:46am

I want that when i come back to the page where i selected the items in the listbox, i should find them selected(highlighted) still

Pong D. Panda 14-Apr-11 6:09am

check my updated solution

BobJanova · Answer 2 · 2011-04-14T00:03:00

I'm not an ASPX expert but ... I think you will need to store the information in the session, and in your Page_Load handler for this page, set the appropriate items to be selected again. Remember that HTTP is by default stateless and so each visit to the page is a new visit, unless you write some session code to remember things.

Pratik Bhesaniya · Answer 3 · 2011-04-14T03:55:00

SQL

ListBox.Items.Add(New ListItem("Select ListBox Type", ""))
        ListBox.DataSource = object
        ListBox.DataValueField = "TextField"
        ListBox.DataTextField = "ValueField"
        ListBox.DataBind()
        ListBox.SelectedIndex = 0

Here it Shows by Default selection as "Select ListBox Type" bcz it's SelectedIndex is set to ZERO(0).
You can change as per your requirement.

how to keep the selected item of listbox selected

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