[RESOLVED] listbox SelectedIndex problem

hello everyone,
I'm trying to retrieve the selected index of a listbox, but every time i do, i just get -1. here is my code:

Code:

---

Try
        Dim DeleteID As String = SectionList.SelectedIndex   
        MsgBox(DeleteID)       
        Catch ex As Exception
            lblWarning.Text = ex.Message           
        End Try

---

The listbox is filled from a dataset, in the code behind the code. here is that code:

Code:

---

Private Sub FillListview()
        Dim myConnString As String = "Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\AppStore.mdf;Integrated Security=True;User Instance=True"
        SectionList.Items.Clear()


        Dim userName As String = Session("MyUserName")
        Dim TeacherID As String = GetTeacherID(userName)

        Dim ds As New DataSet()
        Dim SQLDataTable As New DataTable
        Dim SQLCon As New SqlClient.SqlConnection
        Dim SQLCmd As New System.Data.SqlClient.SqlCommand
        Try
            With SQLCmd
                .CommandText = "FillSections"
                .CommandType = CommandType.StoredProcedure
                .Parameters.AddWithValue("@TeacherID", TeacherID)

                .Connection = SQLCon
            End With

        Catch ex As Exception
            lblWarning.Text = ex.Message
        End Try

        Dim da As New System.Data.SqlClient.SqlDataAdapter(SQLCmd)

        Try
            Using SQLCon
                SQLCon.ConnectionString = myConnString
                SQLCon.Open()
                da.Fill(ds)
            End Using
        Catch ex As Exception
            lblWarning.Text = ex.Message
        Finally
        End Try

        Try
            FinalCount = ds.Tables(0).Rows.Count
         
            ReDim MyArray(FinalCount, FinalCount)

            Dim i As Integer = 0

            If ds.Tables(0).Rows.Count > 0 Then
                For Each dt In ds.Tables
                    For Each dr In dt.Rows
                        MyArray(i, 0) = dr("SectionID")
                        MyArray(i, 1) = dr("SectionName")
                        SectionList.Items.Add(dr("SectionName"))
                        i = i + 1

                    Next
                Next
            Else
            End If
        Catch ex As Exception
            lblWarning.Text = ex.Message
        End Try


    End Sub

---

Like i said, regardless of which item i pick, i always get -1. anyone have any ideas?

thanks
jason

never mind. for anyone else who's has this problem, it due to post back. i guess whenever theres a postback, you have to make sure you dont refill the list view, or it wipes what is currently selected. this can be done with this:
If Not Page.IsPostBack Then
FillListview() 'where this is your method to fill the listbox
Else


End If