protected void btnSave_Click(object sender, EventArgs e) { string id; DateTime tmp = DateTime.Now; String gkt = tmp.ToString("MM/dd/yyyy"); string cc; for (int i = 0; i < grvRoll.Rows.Count; i++) { id = grvRoll.Rows[i].Cells[0].Text; cc = ((RadioButtonList)grvRoll.Rows[i].FindControl("rdoListChamCong")).SelectedValue.ToString(); Manage.AddAttendance(id, gkt, Convert.ToInt32(cc)); cc = string.Empty; id = string.Empty; } Response.AddHeader("refresh", "0;url=Redirect.aspx"); }