Hi, does anyone know how to add date validation? This is what I currently have:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace Calculate_reservation_totals
{
public partial class CalReservationTotals : Form
{
public CalReservationTotals()
{
InitializeComponent();
}
private void CalReservationTotals_Load(object sender, EventArgs e)
{
const int pricePerNight = 115;
txtPrice.Text = pricePerNight.ToString("£.00");
}
private void butCalculate_Click(object sender, EventArgs e)
{
DateTime arrival;
DateTime depart;
if (String.IsNullOrEmpty(txtArrival.Text) || !DateTime.TryParse(txtArrival.Text, out arrival))
{
MessageBox.Show("Please enter a date");
return;
}
arrival = arrival.Date;
if (String.IsNullOrEmpty(txtDepart.Text) || !DateTime.TryParse(txtDepart.Text, out depart))
{
MessageBox.Show("Please enter a date");
return;
}
depart = depart.Date;
if (depart > DateTime.Today)
{
MessageBox.Show("The arrival date cannot be before the departure date");
return;
}
if (arrival < depart)
{
MessageBox.Show("The departure date cannot be before the departure date");
return;
}
if (arrival == depart)
{
MessageBox.Show("The arrival date and the departure date cannot be on the same date");
return;
}
double nights = (arrival.Subtract(depart).TotalDays);
double price = nights * 115;
string numberOfNights = nights.ToString();
txtNights.Text = numberOfNights.ToString();
string totalPrice = price.ToString("£.00");
txtTotal.Text = totalPrice.ToString();
}
}
private void butExit_Click(object sender, EventArgs e)
{
this.Close();
}
}
}
Please give me any suggestions for alteration.
Thanks
