protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { rcbTerm.DataTextField = "tterm"; rcbTerm.DataValueField = "tterm"; rcbTerm.DataSource = cmb.GetAllTermByStudent(Session[sessionNames.userID_StudentOstad].ToString()); rcbTerm.DataBind(); rcbTerm.Items.Insert(0, new RadComboBoxItem("انتخاب نمایید")); } }