0
put your code in page load event with
if(!IsPostBack)
{
<pre>int i = 3;
DataTable dt = ibl2.combo1(i);
countrycombo.DataSource = dt;
countrycombo.DataBind();
countrycombo.DisplayMember =Convert.ToString( dt.Columns["Country_name"]);
countrycombo.ValueMember = Convert.ToString(dt.Columns["Country_id"]);</pre>
}