protected void Button1_Click(object sender, EventArgs e) { string source = txtSource.Text; string dest = txtDest.Text; DateTime date = Convert.ToDateTime(txtDate.Text); try { var res = b.UpdateSchedule(source, dest, date); if (res != null) { GridView1.DataSource = res; GridView1.DataBind(); } } catch (Exception ex) { throw ex; } }