ASP.NET Display Selected Items from Listbox in Textbox

Question

I'm trying to display all selected items from a listbox into a textbox. Currently I'm doing the following without success:

For i As Integer = 0 To lb_words.ListCount
    If lb_words.Selected(i) = True Then
        tb_text.Text &= " Presto"
    End If
Next

What should be happening is that for every selected item in my listbox (lb.words) I want it to be appended to my textbox. So say my listbox contains Apple, Orange and Banana and I select Apple and Banana, my textbox text should read "Apple Banana"...

I've just introduced myself to ASP.NET so keep things simple :D Thanks.

Something possibly related to your problem - MsgBox won't work in server side code. It won't display a message on the client, and it sure as heck won't display a message on the server :-) — Dan F
– Dan F, Commented May 17, 2009 at 7:02
ok, i removed the messagebox stuff... I was more focusing on the loop than the result... seeing as my loops are the problem — user77482
– user77482, Commented May 18, 2009 at 0:30

Stephen Wrighton · Accepted Answer · 2009-05-18 01:39:08Z

3

Try this:

Dim s as String = ""

For each x as ListItem in lb_words.Items
     if x.Selected Then s &= x.Text & " "
Next

edited May 18, 2009 at 1:39

answered May 17, 2009 at 5:17

Stephen Wrighton

38.1k6 gold badges72 silver badges88 bronze badges

Sign up to request clarification or add additional context in comments.

5 Comments

Wayne Hartman Over a year ago

Using a StringBuilder would be more efficient.

Stephen Wrighton Over a year ago

yes, but he asked for simple, and appending to a string is simpler than dealing with String builders

user77482 Over a year ago

This code looks promising, however I'm getting errors for 'ListBoxItem' amd 'x.isselected'... should I note that I've got Option Explicit and String On? ListBoxItem error gives me the option to replace it with ListItem or ListBox

Stephen Wrighton Over a year ago

@tmhai - the IsSelected should be Selected. and listboxitem should have been ListItem. I blame the errors on it being midnight

Brian McCarthy Over a year ago

my only options w/ variable.selected are .selecteditem, .selectedcvalue, or .selectedindex...

Edwin de Koning · Accepted Answer · 2011-10-20 06:34:57Z

3

        foreach (ListItem Mail in ListBox1.Items)
        {
            if (Mail.Selected)
            {
                Mail.Selected = true+",";
                mail.To.Add(Mail.ToString());                                   
            }

edited Oct 20, 2011 at 6:34

Edwin de Koning

14.4k9 gold badges60 silver badges74 bronze badges

answered Oct 20, 2011 at 3:45

Rock

311 bronze badge

Comments

Community · Accepted Answer · 2011-01-19 09:22:45Z

1

aspx page:

   <asp:ListBox ID="myList" runat="server" SelectionMode="Multiple">
        <asp:ListItem>Apple</asp:ListItem>
        <asp:ListItem>Orange</asp:ListItem>
        <asp:ListItem>Grapes</asp:ListItem>
   </asp:ListBox>
   <br/>
   <asp:TextBox id="myText" runat="server"></asp:TextBox>

codebehind (C#)

 StringBuilder sb=new StringBuilder();
        for (int i = 0; i < myList.Items.Count; i++)
            sb.Append(myList.Items[i].Selected ? myList.Items[i].Text + " " : "");
 myText.Text=sb.ToString();

edited Jan 19, 2011 at 9:22

CommunityBot

11 silver badge

answered May 17, 2009 at 5:23

amantur

40.6k22 gold badges136 silver badges192 bronze badges

Comments

Josh Lee · Accepted Answer · 2011-02-13 19:39:15Z

1

If you are using databound listbox then try this code using button click event:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
    For Each objDataRowView As DataRowView In Me.ListBox1.SelectedItems
        Me.TextBox1.Text &= (objDataRowView("ITEM LIST").ToString() & " ; ")
        'here "ITEM LIST" is the "column name" which is used as DATASOURCE for LISTBOX1
    Next
End Sub

edited Feb 13, 2011 at 19:39

Josh Lee

179k39 gold badges278 silver badges282 bronze badges

answered Feb 13, 2011 at 15:52

RAJ

111 bronze badge

Comments

Wayne Hartman · Accepted Answer · 2009-05-17 05:17:43Z

0

One solution would be to override the .ToString() method to concatenate all the values in your list.

answered May 17, 2009 at 5:17

Wayne Hartman

18.5k7 gold badges88 silver badges116 bronze badges

1 Comment

Stephen Wrighton Over a year ago

the thing is that he doesn't want ALL the values, just the values that have been selected by the user

Rashmi Pandit · Accepted Answer · 2009-05-17 06:52:57Z

0

You can use lb_words.SelectedItems instead of looping through all the records and finding the selected items among them. You can use the following code:

        Dim s As New StringBuilder()

        For Each item As Object In Me.lb_words.SelectedItems
            s.Append(item)
            s.Append(" ")
        Next

        Me.TextBox1.Text = s.ToString()

If you select Apple & Banana, your textbox will contain 'Apple Banana '

answered May 17, 2009 at 6:52

Rashmi Pandit

23.9k17 gold badges75 silver badges114 bronze badges

1 Comment

Dan F Over a year ago

an asp.net listbox has no SelectedItems method

Malak · Accepted Answer · 2018-10-12 17:30:25Z

0

 protected void Button1_Click(object sender, EventArgs e)
{
    //to display multiple items
    String it =" ";
    foreach (ListItem item in listbox.Items)
    {
        if (item.Selected)
        {
            it = it + ", " + item.Text;
        }
        Label1.Text = it;
    }

}

answered Oct 12, 2018 at 17:30

Malak

351 silver badge8 bronze badges

1 Comment

Malak Over a year ago

with this code you can display multiple items instead of one from the (ListBox) web server control if you added the property (SelectionMode = "Multiple")

Collectives™ on Stack Overflow

ASP.NET Display Selected Items from Listbox in Textbox

7 Answers 7

5 Comments

Comments

Comments

Comments

1 Comment

1 Comment

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

7 Answers 7

5 Comments

Comments

Comments

Comments

1 Comment

1 Comment

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related