Access "dynamically created controls on page load" in page postback

hi experts,

I want to create table with name and checkbox for the values from database (I am trying to create it as dynamically...)
and then on submit button, the items for which checkbox is checked, want to calculate few fields from database.... and update database related to that checkbox.

I tried to do it as two ways
1. with client side controls in code behind, on page load. I am not able to retrieve the checkbox checked values on page postback.......
 'strDisplay.Text = strDisplay.Text & "<tr><td>" & reader2("name").ToString & " : </td><td><input type='checkbox' id='item" & reader("item").ToString & " ' name='' onclicked=saveItems(); style='font-family:Verdana; font-size:11px; width:50px;' /></td></tr>"

where strDisplay is label..........


2. created server side controls on page load, but it gets disappeared on page postback
                    Dim tc As New TableCell()
                    Dim tc2 As New TableCell()
                    Dim tr As New TableRow()
                    tc.Style.Add("font-size", "11px")
                    tc.Style.Add("font-family", "Verdana")
                    tc2.Style.Add("font-size", "11px")
                    tc2.Style.Add("font-family", "Verdana")

                    Dim _lbl As Label = New Label()
                    _lbl.ID = "lbl" & reader("item").ToString
                    _lbl.Text = reader2("name").ToString
                    tc.Controls.Add(_lbl)
                    Dim _checkbox As CheckBox = New CheckBox()
                    _checkbox.ID = "chk" & reader("item").ToString
                    tc2.Controls.Add(_checkbox)
                    tr.Cells.Add(tc)
                    tr.Cells.Add(tc2)
                    tbl.Rows.Add(tr)
                    Panel1.Controls.Add(tbl)


Can you please help me to get dynamically created checkbox values on page postback.......

I am using VS 2010 and SQL Server 2008 and implementing all this using vb.net.

Thanks.