DaniWeb IT Discussion Community - View Single Post - listbox and selectedvalue urgent

Re: listbox and selectedvalue urgent

Dec 1st, 2008

I'm sorry but I don't understand your problem.
Lets assume you have the below stated example, it adds a few items to the listbox and after a selection is done, it responds the selected value to the page.....

Is thát what you achieved?

 Help with Code Tags 
 ASP.NET Syntax (Toggle Plain Text) 
Partial Class _Default
    Inherits System.Web.UI.Page
 
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        If Not Page.IsPostBack Then
 
            For iCnt As Integer = 1 To 5
                Dim lItem As New ListItem
                lItem.Text = String.Format("New Item {0}", iCnt.ToString)
                lItem.Value = iCnt
                Me.ListBox1.Items.Add(lItem)
                lItem = Nothing
            Next iCnt
        End If
    End Sub
 
    Protected Sub ListBox1_SelectedIndexChanged( _
            ByVal sender As Object, _
            ByVal e As System.EventArgs) _
            Handles ListBox1.SelectedIndexChanged
        HttpContext.Current.Response.Write( _
             String.Format("Selected Value = {0}", _
             CType(sender, ListBox).SelectedValue.ToString))
    End Sub
End Class
Partial Class _Default
    Inherits System.Web.UI.Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        If Not Page.IsPostBack Then

            For iCnt As Integer = 1 To 5
                Dim lItem As New ListItem
                lItem.Text = String.Format("New Item {0}", iCnt.ToString)
                lItem.Value = iCnt
                Me.ListBox1.Items.Add(lItem)
                lItem = Nothing
            Next iCnt
        End If
    End Sub

    Protected Sub ListBox1_SelectedIndexChanged( _
            ByVal sender As Object, _
            ByVal e As System.EventArgs) _
            Handles ListBox1.SelectedIndexChanged
        HttpContext.Current.Response.Write( _
             String.Format("Selected Value = {0}", _
             CType(sender, ListBox).SelectedValue.ToString))
    End Sub
End Class

pagecode;

 Help with Code Tags 
 ASP.NET Syntax (Toggle Plain Text) 
<%@ Page 
    Language="VB" 
    AutoEventWireup="false" 
    CodeFile="Default.aspx.vb" 
    Inherits="_Default" %>
<!DOCTYPE 
    html PUBLIC 
    "-//W3C//DTD XHTML 1.0 Transitional//EN" 
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form 
        id="form1" 
        runat="server">
    <div>
        <asp:ListBox 
            ID="ListBox1" 
            runat="server" 
            AutoPostBack="True" />
    </div>
    </form>
</body>
</html>
<%@ Page 
    Language="VB" 
    AutoEventWireup="false" 
    CodeFile="Default.aspx.vb" 
    Inherits="_Default" %>
<!DOCTYPE 
    html PUBLIC 
    "-//W3C//DTD XHTML 1.0 Transitional//EN" 
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form 
        id="form1" 
        runat="server">
    <div>
        <asp:ListBox 
            ID="ListBox1" 
            runat="server" 
            AutoPostBack="True" />
    </div>
    </form>
</body>
</html>

Last edited by 4advanced; Dec 1st, 2008 at 7:48 am.