protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { if (Session["user"] == null) { Response.Redirect("~/ThaPoTuMi/Home"); } UserAcc user = UserAccService.GetUser(Session["user"].ToString()); txtEmail.Text = user.Email; lbPoint.Text = "Your point is: " + user.Point; drTitle.DataSource = TitleService.GetTitleSuitable(user.Point); drTitle.DataTextField = "TitleName"; drTitle.DataValueField = "TitleID"; drTitle.DataBind(); if (drTitle.SelectedItem == null) { btnChangeTitle.Enabled = false; } if (user.TitleID == 0) { btnRemoveTitle.Visible = true; } } }