protected void pagarFactura_Click(object sender, EventArgs e)
        {
            var factura  = DD_Pagar.SelectedValue;
            var tipoPago = DD_Pago.SelectedValue;
            var prove    = DD_Provedor.SelectedValue;

            ConectionDB conection  = new ConectionDB();
            String      SqlCommand = String.Format("UPDATE [dbo].[Factura] SET [pago] = {0},[fechaPago] = '{1}',[Estatus] = 5 WHERE idFactura = {2}", tipoPago, DateTime.Now.ToString("yyyy-MM-dd"), factura);

            try
            {
                var result = conection.insertCommand(SqlCommand);

                if (result != 0)
                {
                    //notificacion
                    DD_Pagar.Dispose();
                    DD_Pago.Dispose();
                    Response.Write("<script>alert('Pago registrado Exitosamente.');</script>");
                    Response.Redirect("~/PagarFactura");
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }

            conection.CloseDB();
            DD_Pagar.SelectedValue = "";
            DD_Pago.SelectedValue  = "";
        }
        protected void Btn_guardar_Click(object sender, EventArgs e)
        {
            var requisicion = DropDownRequisiciones.SelectedValue;
            var monto       = Txt_Monto.Text;

            string      sqlCommand = "update [dbo].[Factura] set total = " + monto + " , fechaMaxPago = '" + DateTime.Now.AddDays(30).ToString("yyyy-MM-dd") + "' where requisicion = " + requisicion + "";
            ConectionDB connection = new ConectionDB();

            int result = connection.insertCommand(sqlCommand);

            sqlCommand = "update [dbo].[Requisicion] set estado = 3, fechaEntrega = '" + DateTime.Now.ToString("yyyy-MM-dd") + "';";
            result     = connection.insertCommand(sqlCommand);
            if (result != 0)
            {
                //notificacion
                DD_Pagar.Dispose();
                DD_Pago.Dispose();
                Response.Write("<script>alert('Requisicion actualizada correctamente.');</script>");
                Response.Redirect("~/NuevaRequisicion");
            }
        }