protected void Page_Load(object sender, EventArgs e) { int radiovalue = 0; if (!Page.IsPostBack) { if (!String.IsNullOrEmpty(HttpContext.Current.Request.QueryString["s"])) { radiovalue = Convert.ToInt32(HttpContext.Current.Request.QueryString["s"]); } switch (radiovalue) { case -1: RadioButtonList1.SelectedValue = "All"; break; case 0: RadioButtonList1.SelectedValue = "NotEnrolled"; break; case 1: RadioButtonList1.SelectedValue = "Enrolled"; break; } ElevesHelper eh = new ElevesHelper(); ddlFamilySearch.DataSource = eh.FamilyNamesLookup(); ddlFamilySearch.DataTextField = "Nom"; ddlFamilySearch.DataValueField = "ID"; ddlFamilySearch.DataBind(); } }