private void BindGrid() { string constr = ConfigurationManager.ConnectionStrings["StudentsConnectionString"].ConnectionString; using (SqlConnection con = new SqlConnection(constr)) { using (SqlCommand cmd = new SqlCommand("SELECT * FROM Students")) { using (SqlDataAdapter sda = new SqlDataAdapter()) { cmd.Connection = con; sda.SelectCommand = cmd; using (DataTable dt = new DataTable()) { sda.Fill(dt); Attendance.DataSource = dt; Attendance.DataBind(); } } } } }