Reading dynamically added data on postback

[judo]

I have a Listbox on my page which I add RadListBoxitems to on page.load , however when I try read these items from a button.click event they disappear. I can add the items back on page.load but this wont solve the problem as the items the user selected are lost. I guess this is more of an ASP.NET issue but I am stumped as to how I should solve it (I enabled viewstate and presistclientchanges but with no luck).

aspx code:

 <telerik:RadScriptManager ID="RadScriptManager1" runat="server">
        </telerik:RadScriptManager>
        <telerik:RadListBox ID="RadListBox1" runat="server" Style="left: 0px; top: 0px" EnableViewState="true"
            ButtonSettings-ShowTransferAll="False" CheckBoxes="True">
            <ButtonSettings ShowTransferAll="False" />
        </telerik:RadListBox>
        <asp:Button ID="submitBtn" runat="server" Text="Submit" />

code behind:

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

        End If
    End Sub

    Protected Sub submitBtn_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles submitBtn.Click

        For i As Integer = 0 To RadListBox1.Items.Count - 1
            If RadListBox1.Items(i).Checked Then
                'do actions here
            End If
        Next


    End Sub


    Sub populateUserListing()

        For i As Integer = 0 To item.Count - 1
            Dim dummyListItem As New RadListBoxItem("xxx", "xxx")
            RadListBox1.Items.Add(dummyListItem)

        Next

    End Sub

Thanks

[Genady Sergeev]

Hi judo,

I have created sample project using the very code you have provided. As far as I can see, the items are correctly preserved over the postbacks. In the submit button click handler I am able to access all of the previously added files. You can find my sample project as an attachment. Am I missing something?

Regards,
Genady Sergeev
the Telerik team

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