protected void checklogin() { if (Session["is_login"] != null) { if (Session["is_login"].ToString() == "t") { DataTable dt = bus.fetch_leaves_taken(); if (dt.Rows.Count > 0) { grd_ltaken.DataSource = dt; grd_ltaken.DataBind(); } else { btnpdf.Visible = false; btnexl.Visible = false; } } else { Response.Redirect("~/404"); } } else { Response.Redirect("~/Login"); } }