EnableViewstate="false" of combobox

[Lenin]

Hi all,
I want to disable  viewstate property of  combo box. if i did, i cannot fill the combobox inside the isnotpostback of page load.
if i fill out of the ispostback, i cannot preserve the selected data of the combo box. 
how can i solve this  problem.? pls help me.

[Shinu]

Hi Lenin,
One suggestion is by using a hidden field to capture the selected index value of RadComboBox and set the RadComboBox selected item based on the hidden field value.

CS:

protected void Page_Load(object sender, EventArgs e)
    {
            RadComboBoxItem item = new RadComboBoxItem("India","1");
            RadComboBoxItem item1 = new RadComboBoxItem("usa", "2");
            RadComboBoxItem item2 = new RadComboBoxItem("Japan", "3");
            Title.Items.Add(item);
            Title.Items.Add(item1);
            Title.Items.Add(item2);
            if (hdnIndex.Value != String.Empty)
                  Title.SelectedIndex = Convert.ToInt16(hdnIndex.Value);
    }

JavaScript:

<script type="text/javascript">
function Select(sender, eventArgs)
{
    var item = eventArgs.get_item();
    var index = item.get_index();
    document.getElementById("<%= hdnIndex.ClientID %>").value = index;
}
</script>

ASPX:

<input type="hidden" runat="server" id="hdnIndex" />

Thanks,
Shinu.